DESIGN AND FABRICATION OF SMART

PORTABLE AIR CONDITIONER

MOHAMAD AZRIL AFIF BIN GHAZALI

UNIVERSITI KUALA LUMPUR MALAYSIAN

INSTITUTES OF AVIATION ENGINEERING

TECHNOLOGY

JULY2013

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ACKNOWLEDGEMENT

The final year project entitled ― Design and Fabrication of Smart Portable Air

conditioner‖ was successfully finished with the of everyone who participated and

supported me from the beginning to the end of this project. In this opportunity, I

would like to thank on my family and my friends because of their understanding to all

my effort on this project.

A special thanks I given to Mr Abdul Aziz Bin Ahmad and Mr Khir Bin Harun

as my supervisor and co supervisor who were guided and giving full attention to

finish this project. All their suggestions and ideas were very brilliant which very

helpful to apply in this project. The constant support from them leads this project to be

succesull.

Beside that, to a very special person Mr Ahmad Zaini Bin Idris from Giat Mara

Teluk Intan that I would to thanks because of giving permission to use his workshop

and helping on finding the components and material for this project.

Finally, I would like to express my full appreciation to all my comrades from ―

Bachelor Mechanical Semester 7‖ on giving support and sharing ideas. Without them,

this project may not be established.

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LIST OF TABLES

1. Table 1 : Result Of Test

2. Table 2 :Distance of Cold Air Can Travel

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LIST OF FIGURES

1. Figure 1 : Minimal Air Conditioning

2. Figure 2 : Evaporator

3. Figure 3 : Condensor

4. Figure 4 : Expansion Valve

5. Figure 5 : Compressor

6. Figure 6 : Decoration Of Tree In Outdoor

7. Figure 7 : Decoration Of Tree On Stage

8. Figure 8 : Final Product Of Smart Portable Air Conditioner

9. Figure 9 : Flexible Hose

10. Figure 10 : Blower of Broken Window Air Conditioner

11. Figure 11 : Originally of Broken Compressor

12. Figure 12 : Composite Body Of Portable Air Conditioner

13. Figure 13 : Design of The Smart Portable Air Conditioner

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ABSTRACT

Heat as always been a problem in every country such as Malaysia.

Doing work in a hot summer day can be tiring and are prone to make silly

and unwanted mistakes. A proper air conditioner would be good item to

have during these times. When doing work or event, the place could

become stuffy and uncomfortable for technician or engineer. However, air

conditioners are mostly marketed as fix and hard to change places

portable air conditioners are dime a dozen but somehow are very

expensive to have. In this project, we aim to make a portable air

conditioner that is affordable and reliably cool small confined for a

limited amount of time and space..

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CONTENTS

LIST OF TABLES

LIST OF FIGURES

ABSTRACT

CHAPTER 1: INTRODUCTION ............................................................................................ 10

1.1. Portable Air Conditioning system ............................................................................. 10

1.2. Statement Of Problem ............................................................................................... 11

1.3. Objective .................................................................................................................... 12

1.4. Scope And Limitation ................................................................................................ 12

CHAPTER 2: LITERATURE REVIEW ................................................................................. 13

5.1 A Short History Of Refrigerant-Cycle Air Conditioners ........................................... 13

5.2 General Air Conditioning System ............................................................................. 14

5.3 Air-Conditioning Processes ....................................................................................... 17

5.4 Type Of Air Conditioning Systems ........................................................................... 18

4.2.1 Central Air Conditioning Systems. .................................................................... 18

4.2.2 Unitary Air Conditioning Systems. .................................................................... 19

4.2.3 Room Air Conditioning Units. ........................................................................... 19

4.2.4 Built-up Systems. ............................................................................................... 20

4.2.5 Split System Air Conditioners ............................................................................ 20

5.5 Air Conditioning System Components ...................................................................... 21

5.6 Outdoor Design Conditions ....................................................................................... 23

5.7 Motion Sensor ............................................................................................................ 25

5.8 Design Of Tree As Decoration .................................................................................. 27

5.9 PORTABLE AIR CONDITIONER .......................................................................... 29

4.2.1 EARLY DATA ROOM ..................................................................................... 29

4.2.2 RENTAL MARKET .......................................................................................... 30

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4.2.3 CONTRACTOR SOLUTIONS .......................................................................... 31

CHAPTER 3 METHODOLOGY ............................................................................................. 32

5.1 THEORETICAL ANALYSIS ................................................................................... 33

4.2.1 Group Discussion ............................................................................................... 33

4.2.2 Final year project topic. ...................................................................................... 33

4.2.3 Time frame of the project. .................................................................................. 33

4.2.4 Risk and analysis of this project successfully. ................................................... 34

4.2.5 Internet ............................................................................................................... 34

4.2.6 Design Analysis .................................................................................................. 34

4.2.7 Visit .................................................................................................................... 34

5.2 VALIDITY OF THEORITICAL ANALYSIS .......................................................... 35

4.2.1 Manufacturing .................................................................................................... 35

4.2.2 Product Testing .................................................................................................. 36

CHAPTER 4 RESULT AND DISCUSSION .......................................................................... 37

5.1 RESULT .................................................................................................................... 37

4.2.1 FLEXIBLE HOSE .............................................................................................. 38

4.2.2 TESTING ........................................................................................................... 38

5.2 DISCUSSION ............................................................................................................ 41

4.2.1 AIR CONDITIONER REPAIRED COMPONENTS ........................................ 41

4.2.2 DECORATION DESIGN .................................................................................. 43

4.2.3 EASY TO SETUP .............................................................................................. 44

CHAPTER 5 CONCLUSION AND RECOMMENDATION ................................................. 45

5.1 CONCLUSION ......................................................................................................... 45

5.2 FUTURE DEVELOPMENT ..................................................................................... 46

REFERENCES ......................................................................................................................... 47

APPENDIX .............................................................................................................................. 48

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CHAPTER 1: INTRODUCTION

1.1. Portable Air Conditioning system

Portable air conditioner is an innovation product originally from standard air

conditioner that is limited to be used in room or inside building . Then, it is design to

make it easier to move from one place to another. This product is design looks like a

decoration tree which people mostly use it as an decoration in outdoor event such as

wedding and talk.

As we all notice that Malaysia has a tropical rainforest climate due to its

proximity to the equator. It is hot and humid country all year round, with an average

temperature of 27 °C (80.6 °F) and almost no variability in the yearly temperature.

Mostly malaysians are finding a way to get comfort escpecially during day event. This

portable air conditioner can help them to produce comfortable environment in the hot

day. Besides, they do not have to depend to conventional fan that still producing warm

air but this portable will give cold air same as normal air conditioner that in close

room.

This portable air conditioner is equiped with photo sensor that can sense the

existence of people in front of it and it will automatically switch off if there is no

people and it will turn on back if it detect people crossing or standing in front of it.

This will make people easier rather than switching on or off manually especially in the

busy event. It is also economize the electricity when the usage is continously without

people using it which lead to waste the energy.

The present of air conditioner is difficult to install especially to fit in outdoor

environment. This product is design with wheel which make it easier to move and

install. With the simplest installation procedure, anyone can easily install the air

conditioner to wherever they are desired.

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1.2. Statement Of Problem

Nowadays, air conditioners are commonly found in homes and in public

enclosed spaces due to the natural demand for thermal comfort.the air conditioner has

become an important thing in providing comfortable due to hot temperature climate

especially in south east asia countries. Because of that, they need an alternative way to

encounter the hot day especially in outdoor event.

But right now, lack of air conditioner has been produced for outdoor usage and

because of that there are some difficulties to set up the normal air conditioner to be

used in the open space which is required a lot of time to spend to move and set up the

air conditioner.

Concerning into this problem, I have found there is a high demand to a product

which solving this problem and make people easier to transfer from one place to

another which is saving in term of time and cost.

Besides that, during outdoor event the air conditioner should has suitable space

to place in order to get full air condition function which is located as near to

participant of the event and it should not bother the decoration of the event. To solve

this case, the air conditioner should be looks like a part of the event decoration such as

decoration tree.

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1.3. Objective

1. To develop a new type of portable air conditioning system which is

easy to setup and bring everywhere rather than conventional air

conditioner.

2. To design a new design of air conditioner that can reduce space

which can be used as decoration.

3. To repair a broken air conditioner to be working and produce a new

type of air conditioner.

1.4. Scope And Limitation

After a discussion about this project, I have set up a few limitations that must

be attention for this project. The air conditioner should place near and direct to people

in order to get full function of the air conditioner. And user needs provide power

supply to plug in the electricity to the air conditioner.

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CHAPTER 2: LITERATURE REVIEW

5.1 A Short History Of Refrigerant-Cycle Air Conditioners

Remarkably, one of our founding fathers, Ben Franklin, had a hand in the

underlying science of air conditioning. In 1758, Ben Franklin and a colleague in

England, chemist John Hadley, conducted an experiment on the cooling properties of

evaporation. By using a bellows to evaporate highly volatile liquids like alcohol and

ether, they were able to drop the temperature to 7°F, building up a thick layer of ice on

their mercury thermometer—while the ambient temperature was 64°F (Energy

Solution, 2012)

In 1820, another of history‘s greatest scientists, the British inventor Michael

Faraday, showed that by mechanically compressing ammonia to liquefy (condense) it

and then allowing the ammonia to expand and evaporate, he could cool air. And in

1842, a Florida physician, John Gorrie, wanting to keep patients cool, was able to use

this principal to make ice in an Apalachicola hospital. Gorrie patented his system in

1851 and hoped to commercialize it to cool buildings, but his financial backer died

and with it, Gorrie‘s path to success. Air conditioning would not reappear for 50 years

(Energy Solution, 2012).

In 1902, Willis Carrier of Syracuse, New York perfected a system for

dehumidifying a commercial printing plant. The goal was to stabilize the paper, but

the invention also kept the plant‘s temperature more comfortable and the workers

more productive. He formed The Carrier Air Conditioning Company of America to

produce these systems, eventually extending beyond commercial buildings to homes.

With 32,000 employees in 170 countries, Carrier Corporation(now a subsidiary of

United Technologies Corporation) is today the world leader in high-technology

heating, air conditioning, and refrigeration systems (Energy Solution, 2012).

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5.2 General Air Conditioning System

A fan draws air from the room first through a cooling device, consisting of

metal fins extending from a pipe through which cooling fluid circulates, at a rate

determined by the thermostat or by the humidistat. The air next passes over a heater,

usually electrical, which is energised on instructions from the room thermostat.

FIGURE 1- Minimal Air Conditioning.

The part of the system in the room, on the left, pulls airfirst over a cool surface

and then over a warming surface. The part of the system on the right recirculates the

cooling fluid. The fluid passes from the reservoir through a valve B into the lower

pressure within the cooling unit in the room. There the liquid boils, removing heat

from the air. The boiling point is fixed by the constant pressure set by valve A. The

vapour is then compressed and condensed back into a liquid which collects in the

reservoir ready for another cycle.

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Air conditioning has in the past been used where the climate is too hot for

comfort. Cooling will increase the relative humidity of the air, so humidification is not

usually built into these systems. If it is necessary, the usual method is to inject steam

from electrically boiled water. That is all there is to the part of the system in the room,

which is sketched on the left in figure The bit that is more difficult to understand, or at

least unfamiliar to most people, is how the cooling fluid is produced and controlled.

That is the part on the right of the diagram.

The cooling fluid used to be a chlorofluorocarbon compound, and often still is,

though they all more or less ravage the earth's ozone layer. The essential

characteristics of these fluids is that they have quite a low boiling point at atmospheric

pressure and that they can stay in the pipes for a long time without decomposing either

themselves or the pipes. Finally they need to have some lubricating ability, or the

ability to carry a lubricant, because the fluid has to be compressed and pumped round

the system. This rare set of necessary properties has proved difficult to combine with

friendliness to the earth's atmosphere. The liquid is let into the cooling unit through a

valve marked B on the diagram. It evaporates while it passes through the pipe, taking

heat from the air just as water evaporating from a towel laid on your fevered brow

cools you when on holiday in the Mediterranean.

The temperature in the cooling coil depends partly on the amount of fluid let

in by the valve, which is controlled by the thermostat or the humidistat. But now

comes a crucial difference from your Mediterranean experience: the minimum

temperature at the cold surface can be fixed by controlling the pressure in the cooling

coil, with the valve marked A on the diagram. The boiling point of any liquid depends

on the pressure. One could use water in the cooling coil, if the pressure is kept low

enough. At 1000 Pa pressure, which seems a lot but is just 1% of atmospheric

pressure, water boils at 7 degrees. It isn't used in cooling coils of this evaporative type

because it has practical disadvantages.

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The reason for wanting to limit the minimum temperature is to stop ice clogging the

air passage. There are clever systems which notice when ice has formed and hold a

melting pause, but that adds to the cost. The pressure controller is therefore set to

make the cooling fluid boil at the lowest temperature that is likely to be needed to

control the humidity, but always over zero degrees. The temperature needed for

cooling is nearly always higher than that needed for dehumidification so it is the RH

setting that is decisive.

This brings me to the first point that conservators need to understand: it is expensive to

produce air at a dew point below about 4 degrees in this type of equipment. This

dewpoint corresponds to 50% RH at 15°C. This sort of air conditioning is entirely

suitable for keeping people comfortable but it is not good for specialised stores, for

films or for furs, for example, where one needs a temperature below 15 degrees. Such

equipment is, however, often used for such places. A better solution is to use an

absorption dehumidifier, which will be described in a later article.

Now back to the main story: The vapour that emerges through the pressure controller

is gathered up by a compressor. The compression also heats the gas, as will be

understood by anyone who has pumped up a cycle tyre. The hot gas is then led away

from the room, to be cooled down. This is often done on the roof or in a small

enclosure which vibrates to the roar of the fan blowing air over the fins of a condenser.

The cooled, now liquid coolant is piped back to the reservoir, ready for its next tour

through the room air conditioner.

The entire process described above is inefficient and uses electricity, which is itself

produced by inefficient conversion of heat energy. Such systems are therefore

confined to small places where the inefficiency is compensated by the generally high

reliability and freedom from maintenance.

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5.3 Air-Conditioning Processes

An air-conditioning proces (Wang, S.K. and Lavan, Z, 2009) describes the

change in thermodynamic properties of moist air between the initial and final stages of

conditioning as well as the corresponding energy and mass transfers between the moist

air and a medium, such as water, refrigerant, absorbent or adsorbent, or moist air itself.

The energy balance and conservation of mass are the two principles used for the

analysis and the calculation of the thermodynamic properties of the moist air.

Generally, for a single air-conditioning process, heat transfer or mass transfer

is positive. However, for calculations that involve several air-conditioning processes,

heat supplied to the moist air is taken as positive and heat rejected is negative.

The sensible heat ratio (SHR) of an air-conditioning process is defined as the

ratio of the change in absolute value of sensible heat to the change in absolute value of

total heat, both in Btu/hr:

Equation 1:

For any air-conditioning process, the sensible heat change

Equation 2:

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The latent heat change is

Equation 3:

5.4 Type Of Air Conditioning Systems

There are several type of air conditioning systems(J. Paul Guyer, 2009)) that

are commonly use to build up an air conditioner which are:

4.2.1 Central Air Conditioning Systems.

Use these systems for applications where several spaces with uniform loads

will be served by a single apparatus and where precision control of the environment is

required. Cooling coils can be direct expansion or chilled water. Select air cooled or

evaporative condensers, cooling towers, and ground-loop systems based on life cycle

economics considering operating efficiencies and maintenance costs associated with

outdoor design conditions and environment, e.g., high ambient temperatures and dusty

conditions could adversely impact the operation of air cooled condensers. Consider

temperature rise of chilled water supply when selecting chilled water coils, especially

for applications requiring precision humidity control.

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4.2.2 Unitary Air Conditioning Systems.

These systems should generally be limited to loads less than 100 tons. Unitary

systems are packaged in self-contained or split configurations. Self-contained units

incorporate components for cooling or cooling and heating in one apparatus.

Thermostatic expansion valves are preferred over capillary tubes and orifices for

refrigerant control when available as a manufacturer's option since expansion valves

provide better superheat control over a wide range of operating conditions. Split

systems may include the following configurations:

a) Direct expansion coil and supply fan combined with a remote

compressor and condensing coil; or

b) Direct expansion coil, supply fan, and compressor combined with a

remote condenser, cooling tower, or ground-loop system.

These systems generally have lower first cost than central systems but may

have higher life cycle costs. If part load operation is anticipated for a majority of

equipment operating life, consider multiple unitary equipment for superior operating

efficiencies and added reliability. Refer to ASHRAE Handbook, Equipment for size

and selection criteria.

4.2.3 Room Air Conditioning Units.

These units are self-contained units serving only one space. These units are

typically referred to as window or through-the-wall type air conditioners. Rooms

served by these units should have a separate HVAC unit to provide ventilation air for a

group of rooms. Use them when they are life cycle cost effective, and in accordance

with MIL-HDBK-1190. Refer to ASHRAE Equipment Handbook.

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4.2.4 Built-up Systems.

These systems consist of individual components assembled at the building site.

Generally, use them when a large volume of air is handled. These systems may be

used as remote air handling systems with a central cooling plant. unitary air handling

units. Determine the number of air handling units by an economic division of the load,

considering: (a) the value of space occupied by equipment; (b) the extent of ductwork

and piping; (c) the multiplicity of control, maintenance, and operating points; and (d)

energy conservation factors.

4.2.5 Split System Air Conditioners

The more common of the two types of central air conditioners, split system air

conditioners have the compressor / condenser housed in a unit outdoors and the

evaporator indoors. The primary benefit of split system air conditioners is that they

keep the noisy part outside. Split system air conditioners connect into your existing

ductwork, cooling your home evenly and quietly

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5.5 Air Conditioning System Components

These are major parts of an air conditioner that can be use to build up the

portable airconditioner which is to manage refrigerant and move air in two directions:

indoors and outside:

1) Evaporator – to receives the liquid refrigerant

Figure 2 - Evaporator

2) Condenser - Facilitates heat transfer

Figure 3 – Condensor

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3) Expansion Valve – to regulates refrigerant flow into the

evaporator

Figure 4 - Expension Valve

4) Compressor - a pump that pressurizes the refrigerant

Figure 5 - Compressor

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5.6 Outdoor Design Conditions

In principle, the capacity of air-conditioning equipment should be selected to

offset or compensate for the space load so that indoor design criteria can be

maintained if the outdoor weather does not exceed the design values. Outdoor and

indoor design conditions are used to calculate the design space loads. In energy use

calculations, hour-by-hour outdoor climate data of a design day should be adopted

instead of summer and winter design values. ASHRAE Handbook 1993 Fundamentals

(Chapter 24 and 27) and Wang’s Handbook of Air Conditioning and Refrigeration

(Chapter 7) both list tables of climate conditions for the U.S. and Canada (Wang‘s

Handbook of Air Conditioning and Refrigeration - Chapter 7) based on the data from

the National Climate Data Center (NCDC), U.S. Air Force, U.S. Navy, and Canadian

Atmospheric Environment Service(ASHRAE Handbook 1993). In these tables:

• Summer design dry bulb temperature in a specific location To.s, in F, is the rounded

higher integral number of the statistically determined summer outdoor design dry bulb

temperature To.ss so that the average number of hours of occurrence of outdoor dry bulb

temperature To higher than To.ss during June, July, August, and September is less than 1,

2.5, or 5% of the total number of hours in these summer months (2928 hr). The data

are an average of 15 years. An occurrence of less than 2.5% of 2928 hr of summer

months, that is, 0.025 2928 = 73 hr, is most widely used.

• Summer outdoor mean coincident wet bulb temperature in F, is the mean of all the

wet bulb temperatures at the specific summer outdoor design dry bulb temperature To.s

during the summer months.

• Summer outdoor 2.5% design wet bulb temperature is the design wet bulb

temperature that has an average annual occurrence of less than 73 hr. This design

value is often used for evaporative cooling design.

• Mean daily range, in F, is the difference between the average daily maximum and

the average daily minimum temperature during the warmest month.

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• In ASHRAE Handbook 1993 Fundamentals, solar heat gain factors (SHGFs), in

Btu/h.ft2, are the average solar heat gain per hour during cloudless days through

double-strength sheet (DSA) glass. The maximum SHGFs are the maximum values of

SHGFs on the 21st of each month for a specific latitude.

• Winter outdoor design dry bulb temperature To.w, in F, is the rounded lower integral

value of the statically determined winter outdoor design temperature To.ws, so that the

annual average number of hours of occurrence of outdoor temperature To > To.ws is equal

to or exceeds 99%, or 97.5% of the total number of hours in December, January, and

February (2160 hr).

A degree day is the difference between a base temperature and the mean daily outdoor

air temperature To.m for any one day, in F. The total numbers of heating degree days

HDD65 and cooling degree days CDD65 referring to a base temperature of 65F per

annum are (J. Paul Guyer, 2009)

Equation 4:

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5.7 Motion Sensor

Motion detection(Wikipedia, the free encyclopedia) is a process of confirming a

change in position of an object relative to its surroundings or the change in the

surroundings relative to an object. This detection can be achieved by

both mechanical and electronic methods. In addition to discrete, on or off motion

detection, it can also consist of magnitude detection that can measure and quantify the

strength or speed of this motion or the object that created it. When motion detection is

accomplished by natural organisms, it is called motion perception.

Motion can be detected by: sound (acoustic sensors), opacity (optical and

infrared sensors and video image processors), geomagnetism (magnetic sensors,

magnetometers), reflection of transmitted energy (infrared laser radar, ultrasonic

sensors, and microwave radar sensors), electromagnetic induction (inductive-loop

detectors), and vibration (triboelectric, seismic, and inertia-switch sensors). Acoustic

sensors are based on: electret effect, inductive coupling, capacitive

coupling, triboelectric effect, piezoelectric effect, and fiber

optic transmission. Radar intrusion sensors have the lowest rate of false alarms.

Motion sensor is a device for motion detection. That is, it is a device that

contains a physical mechanism or electronic sensor that quantifiesmotion that can be

either integrated with or connected to other devices that alert the user of the presence

of a moving object within the field of view. They form a vital component of

comprehensive security systems, for both homes and businesses.

Motion sensor that transforms the detection of motion into an electric signal.

This can be achieved by measuring optical changes in the field of view. Most motion

detectors can detect up to 15 – 25 meters (50–80ft).

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There are four types of sensors used in motion detectors spectrum:

1. Passive infrared sensors (Passive)-Senses body heat. No energy is

emitted from the sensor.

2. Ultrasonic (active)-Sends out pulses of ultrasonic waves and measures

the reflection off a moving object.

3. Microwave (active)-Sensor sends out microwave pulses and measures

the reflection off a moving object. Similar to a police radar gun.

4. Tomographic Detector (active)-Senses disturbances to radio waves as

they travel through an area surrounded by mesh network nodes. Has the

ability to detect through walls and obstructions.

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5.8 Design Of Tree As Decoration

In Malaysia, mostly events are designed with tree decoration especially in

wedding because it is the symbol of traditional. There few types of tree that been used

as decoration such as oak, palm oil and christmas.

Nowadays, tree branches is a trend of the wedding decoration that will not

being out-dated. Tree is growing from a seed via hundred years, thousand years. It is a

gift from mother nature and it is a gift for wedding couple to have a memorable

wedding uniquely(aweddingplannermalaysia.blogspot.com,2012).

Tree signatures a support and strong bond with human. Tree trunk is like our

love of each other who is giving a solid supports to all the people to sit or stand under

it. When hot sun or heavy rain, the tree leaves will cover us and let us to have faith

facing challenge and continue the life journey. It symbolize a lovely meaning for

couple to use tree as their wedding decoration.

Figure 6 – Decoration Of Tree In Outdoor

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Tree can be decorated in various way and present in different theme such as

Winter Wonderland with white cherry blossom tree, Oriental with pink cherry blossom

tree, Secret Garden with green trees, etc.Tree can be transformed in various design in a

wedding such as table centerpiece, walkway, entrance, wishing tree to hang message.

Every tree branches used in decoration are real and taken from forest.

If you are an eco-friendly supporter or go green supporter, be mindful to choose this

decoration idea.

Figure 7 – Decoration Of Tree On Stage

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5.9 PORTABLE AIR CONDITIONER

The evolution of an industry and its impact on society often make an

interesting study. Take portable air conditioning: Introduced to America in 1983 by

Denso, a Japanese manufacturer of automotive products, portable air conditioning was

first designed to cool workers on the assembly line.

Initially distributed through the traditional air conditioning wholesale supply

channel, it achieved marginal success in the early years. American industry had little

interest in such an expensive solution, and only a handful of companies adopted this

method for worker comfort.

Most sales in those first years consisted of stock orders from the wholesaler.

Few end user orders were placed. With excess inventory in stock, wholesaler reorders

were scarce. It wasn‘t long before some adjustments needed to be made to the

distribution channel to jump start sales. The decision was made to establish a network

of direct-sales outlets that specialized in portable air conditioning and sold directly to

the marketplace.

This proved to be much more successful than traditional wholesale-

distribution. Sales to the end user improved, but it was good timing that proved to be

the most influential element to the success of the industry. That timing relates to the

explosion of the minicomputer that began in the mid 1980s, during this same period.

4.2.1 EARLY DATA ROOM

Enter the portable air conditioner (spot cooler as it has since been dubbed) as a

dedicated a/c system for many of these smaller computer rooms.

Use in the computer room created visibility and really previewed the products‘

problem-solving capabilities. Other applications for people and process cooling were

soon extrapolated from this exposure. But not all of these new applications had the

year-round requirements of the dedicated computer cooler.

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Some of these new applications resulted from emergency a/c failures or

shutdowns. Others resulted from the higher ambient temperatures in the summer.

These shorter-term needs spawned a demand for rentals, so many of these specialty

distributors responded by developing rental fleets and a structure to provide immediate

access to their customers.

4.2.2 RENTAL MARKET

Portable air conditioning providers started setting up shop across the country.

By the mid 1990s, nearly all major and most secondary cities had a supplier in the

area.

As the market expanded, additional manufacturers with new and different

products sprang up. Units were now offered in not only air-cooled but also water-

cooled, split system, and heat pump configurations. Spot cooling was being used to

solve people-, equipment-, and process-cooling problems throughout the workplace.

Portable air conditioning was becoming mainstream.

Portable air conditioners generally refer to units on wheels that can fit through

standard interior doorways. As such, they can be deployed anywhere within a

commercial building. This tends to limit portable air conditioners to about 5 tons in

capacity. Mobile air conditioners are units mounted on trailers or skids, which can be

hauled or trucked to a site. Mobile units can be anything from a 10-ton trailer-mounted

unit, to 1,000-ton chillers on flat beds.

As the portable air conditioning market was expanding, the mobile air

conditioning market was also growing. American business was becoming increasingly

reliant upon instant access to cooling for any number of cooling problems, large or

small. While portables were ideal for isolated cooling issues within a commercial or

institutional building, mobile units could be dispatched to provide cooling for entire

buildings or structures. Often, both were used for providing the cooling solution.

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4.2.3 CONTRACTOR SOLUTIONS

Air conditioning and mechanical contractors became the biggest advocates for

portable air conditioners. Uses vary depending on conditions. Most contractors rent

equipment, as the larger portable a/c providers will inventory all types and models

locally, making renting a viable option.

Some contractors also maintain a small fleet of the more popular models for

quick deployment. Among the most popular applications are rentals for interim

cooling when replacing, repairing, or servicing server or computer room air

conditioning units. Many contractors also specify portables as dedicated cooling units

for a variety of long-term cooling needs.

But the end user also found spot cooling to be the ideal way to provide

equipment protection as well as worker comfort. Customers in industries across the

entire spectrum have utilized portables in the office, warehouse, production area, or on

the construction site. It‘s safe to say there aren‘t many, if any, types of business that

haven‘t used portables to solve heat-related issues.

Companies with multiple locations or national platforms have become

particularly frequent users as heat-related problems at one location often are also

experienced at others. It is quite common to provide the same products or services to

different branches of nationwide companies across the country. For the same reason,

national service companies also utilize portables regularly.

When something solves your problem, you come to rely on it. Use it often

enough, and it is no longer considered a luxury, but a necessity. Take it away, and you

experience hardship. You would find this to be true if you no longer had access to

your cell phone, laptop, or the Internet.

Add portable air conditioning to this list. It has evolved to the point where it is

no longer just a curiosity; from our standpoint, it ranks in importance right up there

with all of our other modern conveniences.

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CHAPTER 3 METHODOLOGY

Methodology can properly refer to the theoretical analysis of the methods

appropriate to a field of study or to the body of methods and principles particular to a

branch of knowledge(www.answers.com/topic/methodology). In this chapter, it talks

about the methods use to gather information in order to finish the research. It was

involve the process flow of every step in archive the objective of this project. There

are many methods use in this project such as internet references, interviewing lecturers

and technicians and the most important is group discussion.

METHODOLOGY

Internet

Design Analysis

Group Discussion

Product Testing

Manufacturing

Visit

Validity of Theoretical

Analysis

Theoretical

Analysis

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5.1 THEORETICAL ANALYSIS

4.2.1 Group Discussion

There 2 more students with same that are doing research on the same type of

project which is air conditioner but 2 of them are doing in different part. So, we are

also gather together to discuss about this project,. By discussing among the group, we

help each other to solve problem. By doing group discussion we manage to came out

with a few solution of the problem statement. These are the discussion that we were

discussed:

4.2.2 Final year project topic.

To complete the requirement of this final year project, I need to choose three topic to

be our own project and we have come out with few topics which need further

discussion to select which topic are the suitable. The 3 topics are compressor study,

refrigerant study and I have finally decided to choose new generation of portable air

conditioner as the topic of my final year project. We have concluded that they will do

their test also in my project. This is because the new generation of portable air

conditioner has full fill all the final year project requirement that are application,

realistic, modification and innovation.

4.2.3 Time frame of the project.

At first stage, we have discussed the time line of this project. After the topic

was selected, we were writing the topic proposal for one week. We had divided into

four phases of the time frame. For the first phases, we had searched as many as

information that could for about two month. The second phases are we start writing

the progress report. The progress report included introduction, literature review and

methodology. We spent time for this phase about two months. Phase three and four

will be next semester which the manufacturing process and result.

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4.2.4 Risk and analysis of this project successfully.

In our project, i have found few risks that can jeopardise my result. So i discuss

with them. The risks that we face are the process of manufacturing needs highly skill.

Manufacturing the portable air conditioner involve process such as safety, assembling,

and painting. If there are mistake happen, the functionality of this air conditioner will

be reduce. Other than that, to develop the portable air conditioner we need to spend a

lot of money to make this project success. So we have set up a few limitations on our

project to get good result.

4.2.5 Internet

By using the internet, I manage to get useful information about components to

construct the portable air conditioner that I can choose which the suitable components

can be equipped to the portable air conditioner. From the internet I have found the

common decoration that people are using especially for Malaysians.

4.2.6 Design Analysis

After gather all information, I need to design portable air conditioner. At the

early stage I only do drawing and sketching on the paper. I have drawn as many

designs that possible. After complete the drawing, we have chosen one drawing that is

the best design and the latest. The next step is to get the measurement of the design

that can be suit into air conditioning system.

4.2.7 Visit

I have been set up to visit Giat Mara Teluk Intan which they have won

innovation competition among Giat Mara Malaysia with innovation airconditioner

product. The purpose to come here is to get some advice about the air conditioning

system from their teacher and use some of their facilities to manufact the air

conditioner due to Unikl Miat is not have enough tools and equipment especially for

normal air conditioner.

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5.2 VALIDITY OF THEORITICAL ANALYSIS

4.2.1 Manufacturing

Before starts the manufaturing process, there are some materials are needed to

prepared to manufact this smart portable air conditioner which are:-

1. Hose

2. Fiber

3. Resin

4. Wheels

5. Paint

6. Decoration stuff

7. Refrigerant (R22 and Co2)

Beside that, the list equipments needed on this project are:-

1. spanar set

2. solder and welder

3. filler

4. brush

5. thermometer

6. drill

7. vacuum pump

8. pressure gauge

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In the manufacturing process, I have chosen all the suitable components to use

in the system then assemble all of it to be a air conditioning system. The decoration of

the portable airconditioner will be making as housing of the conditioner. There are

severeal steps in manufacturing process which are:-

1. Finding unused components whether already damaged or still working

but it should be repairable. The main components should find is

compressor and blower.

2. The next step is repair the components. There are several steps of

repairing process such as placing parts, welding, soldering and wiring.

The problem that usually occur on the unused compressor and blower is

leakage at the pipes.

3. The air conditioner is design raftly and it should be fitted wih the

components then do the scaling to get the exact size of the air

conditioner body.

4. Then it is proceed with molding the the air conditoner body by using

composite materials. The materials used to build the air conditioner

body are fiber, resin and catalyst.

5. After the bulding the body is finished, it is proceed with the painting

process. The body is paint by using varnish to make it look like a real

tree. then it will add some decorations like leaf.

6. The last stage of the process is testing. The product is tested by

assembling all the components and connect with the power source.

4.2.2 Product Testing

After the product has been finalized, this product will be tested in Unikl Miat

workshop. it will test the portable air conditioner to use inside the workshop whether it

can operate or not. If not, some modification should do to make sure it functions

properly.

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CHAPTER 4 RESULT AND DISCUSSION

5.1 RESULT

To create smart portable air conditioner, the components of the air conditioner

that will be used has been identify to suit with the design. It has been done by finding

unused components of air conditioner such as blower and compressor. The data was

collected.

Figure 8 – Final Product Of Smart Portable Airconditioner

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4.2.1 FLEXIBLE HOSE

Flexible wire is use on this smart portable air conditioner system because it is

easier to move the air conditioner rather than using cooper tube. The flexible hose is

made of rubber and it is usually uses in car air conditioning system. For this this

system, I have been using this hose for 10ft but we can increase the length of the hose

if need.

Figure 9 - Flexible Hose

4.2.2 TESTING

The testing of this smart portable air conditioner has been tested at two type of

place which are in small confined place ad outdoor. The thermometer has been used to

measure the temperature. It was put 1meter in front of the air conditioner direct to the

air out. This test is done to measure the effectiveness of the air conditioner to cool the

environment.

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Time (Minute)

Temperature (Degree

Celcius) at 6x8x4ft room

Temperature (Degree

Celcius) atoutdoor in

open air

1 34 36

2 32 36

3 30 35

5 28 33

10 25 32

20 25 32

Table 1- Result of the test

As we can see from the result, the air conditioner is easier to cool in the small

confined room because of the closed area. But in the open area, this is very difficult to

cool because of the some reason which are it was placed in open air and the blower

was not strong for cooled air to reach longer distance. The blower should be strong as

a big fan to cool larger area.

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Distance (feet)

Temperature (Degree Celcius) in small

confined room

0 25

0.5 25

1 25

1.5 27

2 28

2.5 29

3 30

Table 2 – Distance the cold air can travel

Based on the result above, the maximum distance of the cold air can travel is 2

feet which is the optimum distance effectiveness of the portable air conditioner. It is

still not reaching the target in the beginning of the project. This should be improved in

the future with adding a stronger blower which can increase the distance of the cold air

travel.

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5.2 DISCUSSION

4.2.1 AIR CONDITIONER REPAIRED COMPONENTS

The old type of window air conditioner is choose because of the size of the

component is small and easy to be suited to the design which is tree. The component is

use as blower of the smart portable air conditioner.

Figure 10 - Blower of Broken Window Airconditioner

Then, I found a damaged compressor but it still repairable because of the motor

is still working properly.

Figure 11- Originally of Broken Compressor

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For the repaired, I have been doing repairing on the compressor and the

blower. For the blower, there are some leakage found on the copper pipe but the I have

soldered all the leakage. To make sure there is no leakage, the pipe have been tested

by using water and soap.

On the compressor part, there are some problem on the wiring which is the

wired broken and it may caused by rat or wire decayed. New set of wiring has been

installed on this compressor.

In the other side, by using the repaired components of the air conditing system

has been reducing the cost of making the project which the price of the components

were sold in low price.

In market view, we can just selling this product cheaper in the market place

compared to other portable air conditioners that already established in the market.

Beside that, we might able to recycle the broken components instead of the

components become waste.

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4.2.2 DECORATION DESIGN

The smart portable air conditioner has been design to look like a decoration

tree. It has been made from composite and painted in brown which look like a real

tree. The tree is suitable to be used as a decoration.

Figure 12 - Composite Body Of Portable Airconditioner

So that, there is no needs a larger area to place air conditioner especially during

event. We can also place the smart portable air conditioner directly to cool the area.

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4.2.3 EASY TO SETUP

The smart portable air conditioner has been equipped with wheels which make

it easier to move rather than lift it up with the heavy compressor. The weight of their

air conditioner blower also has been reduced due to the body was ade of composite

which is light weight and strong.

Beside that, it has been designed with ‗plug and on‘ concept which we just

needed to plug the power source to switch on this system. Other than that, there are

just a few steps to assemble the system. It is also could make us faster to install the air

conditioner system rather than conventional air conditioner system.

Figure 13 - Design of The Smart Portable Air Conditioner

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CHAPTER 5 CONCLUSION AND RECOMMENDATION

5.1 CONCLUSION

As a conclusion, we can conclude that a cheap portable air conditioner is

achievable and can be marketable in reality. The portable air conditioner made

satisfies the basic air conditioner functions for cooling purpose. The air conditioner

has been tested to its functions and realibility of its design.

Human factor taught us that human may feel comfortable because of several

factors. One of the factor is the temperature, as we all noticed that some of the country

especially country with equatorial climate such as south east asia have hot temperature

climate. Because of that, air conditioner become one of the important thing that help

people to feel comfortable with reducing temperature in their sorrounding. We can

conclude that this smart portable air is marketable.

With the decoration design such as tree is the frequent that been used in

Malaysia during events. It is because it shows the concept of nature and many people

the concept. But then, mostly event such as on stage has very limited space to place

air conditioner. So, this smart portable air conditioner is possible to reduce space for

air conditioner with placing in decorations space which is near to the user.

The smart portable air condtioner is also proved that it is making people easier

to move the air condtioner with the wheels and simple assembling system. It could

make user faster to move and setup the air conditioner.

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5.2 FUTURE DEVELOPMENT

As this is the first stage of development. Some of the ideas is still can not be

applied on this project because of some problems and time limitation. So that, I will

leave it for the other stage of development either for my own project or other student.

There are a few things that can be improvised this portable air conditioner in the future

develepment.

The electrical energy consumed can be reduced by setting the smart portable

air conditioner to operate automatically. This can be simply done by placing motion

sensor that can sense the motion of people and turn the power on then it will of when

there is no people in that area.

Besides that, other improvement that can be made on this project is to increase

the strength of the cold air flow with creating a new design with adding more or

replce high power of blower. The high power of blower can produce strong air flow

which can increase the length distance.

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REFERENCES

i. Energy Solution,buildinggreen.com,

http://www2.buildinggreen.com/blogs/chilling-out-air-conditioners

ii. Wang, S.K. and Lavan, Z. ―Air-Conditioning and Refrigeration‖ Mechanical

Engineering Handbook, 2009

iii. J. Paul Guyer, 2009,Introduction to Air Conditioning Systems

iv. Wang‘s Handbook of Air Conditioning and Refrigeration (Chapter 7)

v. ASHRAE Handbook 1993 Fundamentals (Chapter 24 and 27)

vi. Wikipedia, the free encyclopedia,

http://en.wikipedia.org/wiki/Motion_detection

vii. A Wedding Planner MalaysiaBlog,

http://aweddingplannermalaysia.blogspot.com/2012/09/tree-branches-wedding-

decoration-idea.html

viii. http://www.answers.com/topic/methodology

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APPENDIX

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