Ritter Arena Improvements

Joe CooperDan Crossen

Diego GuineaAlex Peterson

Mike Walsh

Projects 1 & 2: Reclaiming Wasted Energy

Dan & Mike

Project 1: Using Wasted Heating for Heating Needs

Daniel Crossen

Concrete

Underslab

Ice Surface

Cooling Tower

Heat out from Pumps

Heat Exhaust

14°F 10°F

32°F 36°F

50°F 60-90°F

Current System

Semi-warm water leaving pumps/entering cooling towers at 70-95° F and leaving cooling towers/entering pumps (for cooling) at 65-90°F

Cold water leaving pumps/entering underslab (for warming of ground)at 36° F and leaving underslab/entering pumps at 32°F

Currently, these two systems do not interact, other than through the pumps. However, the semi-warm water is only used to cool the pumps, and does not come into contact with the cold water at all.

70-95°F65-90°F

Concrete

Underslab

Ice Surface

Cooling Tower

Heat out from Pumps

Heat Exhaust

14°F 10°F

32°F 36°F

50°F 60-90°F

Current System (cont’d)

RIT pays to cool down this water from 65°-90°F to 45°-55°F while…

…in the next room, we pay to heat up this water from 32° to 36°F

They are on two separate loops, never coming into contact, and energy is wasted moving their temperatures in opposite directions.

70-95°F65-90°F

Concrete

Underslab

Ice Surface

Cooling Tower

Heat out from Pumps

Heat Exhaust

Heat exchanger

System Overview: Using Waste Heat for Heating

Take the output of this system (65-90°F)

And take the output of this system (32 °F)

And put them through a heat exchanger to utilize the waste heat/cold from one system to heat/cool the other system

70-95°F

65-90°F 70-95°F65-90°F

Functional Flow Diagram Dan Crossen RIT Campus Improvements Group

Wasted Heat/Cold Water Usage Functional Decomposition

Electric power in Water @ 50-70°F

Warm (65-90°F) water

Water @ 36°F

Cold (32°F) water Waste heat from pump

Temperature Outputs

Vary pump speed

Vary pump speed

Pump water to exchanger

Pump water to exchanger

Exchange Heat

Sense Temperature

(input)

Sense Temperature

(output) Calculate

appropriate pump speed

Functional InterfacesRIT Campus Improvements Warm/Cold Water Heat Exchanger Dan Crossen

Warm water Input

Sense Temperature (warm water)

Cold Water Input

Sense Temperature (cold water)

Vary Pump Speed

Pump Water to Exchanger

Exchange Heat

Cold Water Output

Warm Water Output

Fit Into Space

thermometer

data

data

data

data

pipe connection

data

pipe connection

pipe connection

pipe connection

pipe connection

thermometer

thermometer

thermometer

size

size

Benchmarks

Specifications / Metrics Source Function Specification (metric) Unit of

Measure Marginal

Value Ideal Value

Comments/Status

S1 CN6,7 System Warm Water Temp Input °F 70-95 S2 CN6,7 System Warm Water Temp Output °F 65-90 S3 CN6,7 System Cold Water Temp Input °F 32 S4 CN6,7 System Cold Water Temp Output °F 36 S5 CN1,3 System Pump energy usage KW 5 1 S6 CN6 System Pump flow Rate max gpm 6.2 S7 CN1,3 System Heat loss from pipes KW 1 0 S8 CN7 System Pump time constant sec <1 S9 CN1,3 System Pump efficiency % 60 100

S10 CN5,6 System Size of Equipment inches 24x24

x12 12x12

x12

S11 CN2 System System cost $$ <=

$1000

S12 CN5,6 System Weight lbs 60 40

S13 CN7,8 System Operating conditions: temperature °F 32-95 Ambient indoor ice rink S14 CN7,8 System Operating conditions: relative humidity % 0-100 Ambient indoor ice rink

House Of QualityLow

er cost

of heating/cooling

Cost of modific

ations less

than money saved

Modifications must

be sustain

able (green)

Aestheticall

y pleasing

Safe for

human

operatio

n

Can be integrated into current system

Maintain

effective

running conditio

ns

Low mai

ntenanc

e 

Row Tota

l

Column

Total

Row +

Column

Total

Relative

Weight

Lower cost of heating/cooling   C R R C C R R   4 0 4 14%Cost of modifications less than money saved     R R C C R R   4 1 5 18%Modifications must be sustainable (green)       R C C C C   1 0 1 4%

Aesthetically pleasing         C C C C   0 0 0 0%

Safe for human operation           R R R   3 4 7 25%Can be integrated into current system             R R   2 4 6 21%

Maintain effective running conditions               C   0 2 2 7%

Low maintenance                   0 3 3 11%                   Column Total 0 1 0 0 4 4 2 3 28 100%

House of Quality

Customer Needs Final Percentage Ranking

Safe for human operation 25%

Can be integrated into current system 21%Cost of modifications less than money saved 18%

Lower cost of heating/cooling 14%

Low maintenance 11%

Maintain effective running conditions 7%

Modifications must be sustainable (green) 4%

Aesthetically pleasing 0%

House of Quality Summary

StaffingDiscipline How

Many? Anticipated Skills Needed

EE 0

ME 3

ME1: Take care of the design of the flow of fluids. Model the flow of the fluid based off of given temperatures and properties. Choose applicable pump(s). ME2: Thermal modeling of the fluid flow. Analytically obtain flow needed to sustain desired output of 36°F based on input temperatures. ME3: Labview: Construct program to take in the input of the temperatures and output desired flow rates for both warm and cold water. Output the <input temps>, <output temps>, <warm flow rate>, and <cold flow rate> for data analysis.

CE 0

ISE 1

ISE1: Make sure that it will fit in the designed space. Construct a general design that will meet the size requirements obtained from observing usable space in the ice rink.

Project 2: Using Waste Cooling for Air Conditioning

Mike Walsh

Waste Cooling for Air Conditioning

Concrete

Underslab

Ice Surface

Cooling Tower

Heat out from Pumps

Heat Exhaust

14°F 10°F

32°F 36°F

50°F 60-90°F

Functional Decomposition

BENCHMARKING

Cornell University: Lake Source Cooling Project (LSC)

REMKO RVS H Series

SeaWater Air Conditioning(SWAC)

Scale Provides Cooling for Cornell Campus

The system shown is a small scale, but they do have much larger versions

Cooling for Factories, power plants, universities, etc.

# Heat Exchangers 7 n/a Varies with system size

Total Heat Exchanger Surface Area

102,000 feet square n/a Varies with system size

Water used 39 °F Tap Water Sea or Lake Water, temp varies with depth

Energy Savings 80% 5.8-14.7 kW 80% more than conv. AC(Capital is 60% higher)

Other Notes Almost completely replaced mechanical refrigeration on campus

Can be used in winter for heating as well

5-10 year payback

Specifications / MetricsSource Function Specification (metric)

Unit of Measure Marginal Value Ideal Value

Comments/Status

S1 CN6,7 System Ambient Air Temp Input °F   70-95  

S2 CN6,7 System Cooled Air Temp Output °F   65-90  

S3CN6,7 System Underslab Coolant Cold Side

Temp Input°F   32  

S4CN6,7 System Underslab Coolant Warm Side

Temp Output°F   36  

S5 CN1,3 System Pump energy usage KW  5 1-5  

S6 CN6 System Pump flow Rate max gpm   6.2

S7 CN1,3 System Heat loss from pipes KW  1 0-2  

S8 CN7 System Pump time constant sec   <1  

S9 CN1,3 System Pump efficiency %  60 60-100  

S10

CN5,6 System Size of Equipment inches 24x24x12

12x12x12

 

S11

CN2 System System cost $$   <=$1000

S12

CN5,6 System Weight lbs  60 40

S13CN7,8 System Operating conditions:

temperature°F   32-95 Ambient indoor

ice rink

S14CN7,8 System Operating conditions: relative

humidity%   0-100 Ambient indoor

ice rink

Discipline How Many? Anticipated Duties

ME 4

ME1: Design Heat Exchanger, Focus on Validation of Test Results, CAD workME2: Design Heat Exchanger, CAD work, Build Heat ExchangerME3: Build Heat Exchanger, Focus on Validation of Test ResultsME4: Focus on System Integration, Focus on Validation of Test Results

ISE 1 ISE1: Focus on System Integration Aesthetics

Staffing

Presented Design to Customer Customer thought it would be a great idea

for savings, but probably impractical unless the savings were immense.

Requires 400+ feet of piping 1-1/4” Lines◦ Also would require stronger pumps for underslab

system.◦ Not really in the scope of MSD I or II◦ Perhaps MSD VIII

Customer Feedback

Arena SchematicAir

Handler 1

Air Handler

3

Air Handler

2

Underslab SystemAt least 200 feet of piping

in each direction Corner Crew

Air Handler

4

Projects 3& 4: Using the Ice Pile

Joe & Diego

Project 3: Using the Ice Pile for Air

ConditioningJoseph Cooper

Functional Decomposition

Benchmarking

Project Goals:• Same output as Ice Bear• Energy usage without

freezing ice.

Scaled Goals:• 1/5 size of Ice Bear unit• Similar output to

portable a/c unit

Metrics

AB

C

Ice In

Warm Air In

Cool Air Out

A) Ice box/container (~1/2 total unit)B) Air passage/duct w/ heat exchanger (~1/4

total unit)C) Pump/component area (~1/4 total unit)

0.31m0.51 m

0.25m

House of Quality

Discipline How Many? Anticipated Duties

ME 5

ME1: 1) Establish heat exchanger requirements/design between ice and coolant

 ME2: 1) Define the Ice box design, working with ME1

2) Determine the pump required for purchase

ME3: 1) Establish heat exchanger requirements for water to air in order to find one (or more) to purchase

2) Define air flow requirements and research correct fan to purchase

ME4: 1) Design layout of unit and mounting of components (progressive

throughout project)

ME5: 1) Define insulation requirements using knowledge from ME1-3

2) Design power distribution to powered components

Staffing

Customer would like to find purpose for meltwaterUsing “Heat Pipes” with a pre charged coil that will migrate depending on the delta-V between cold & hot side.Is interested in the future possibility of using snow during the winter as well.

Customer Feedback

Project 4: Using the Ice Pile for Pipe

CoolingDiego Guinea

System Overview

Functional Decomposition

Function Interface

BenchmarkCooling Coil Temperature Sensor

Temperature Range: -50oC to 200oC

Applicable flow velocity: Less than 4 m/s

Time Constant: 50s

Heat Exchanger

Flow Rate: 800 GPM

House of QualityEngineering Functions & Metrics              

Customer RequirementsCustomer Weights

Ice Input from Zamb

oni

Warm Water Input Flow

Warm Water Input Temperatur

e

Cold Water Outpu

t Temperatur

e

Tank (Heat Exchanger) Size

Pump Flow Rate

Pump Flow

Adjustment Time

Melted Ice Temperatur

e

Melted Ice

Output Flow

Electrical

Power

Sensor +

Electrical

Lifetime

Heat Exchanger Lifetime

Dimensions

Low maintenance cost 4%                   9      Low prototype cost for a scaled design 1%       9   9              Realistic payback period 3%         3         9 9 9 1Safe for human operation 7%                          Easy intuitive use 4%                          Easy access for maintenance 6%                         3Can be integrated to current cooling tower system 13%   9       9              Clean appearance 7%           9             9Easy acces to ice storage 7% 3                        Durable under hard working conditions 9%                         1Low downtime when being integrated 11%   3       1             3Able to use at the same time with the cooling towers 10%   9   9   9              Provide efficient support to cooling tower 12%       9     3            Holds full ice load from zamboni 0% 9                        Able to run all year round 1% 1                        Easy removal of water from melted ice 5%               3 9        

Discipline How Many? Anticipated Duties

EE   1 EE 1: Design the temperature reading system and integrate to the project working together with the CE 1.

ME   3

ME 1: Determine heat exchange rates between ice and water, water flow rates and the requirements the system needs do have to fulfill the specifications in water temperature.

ME 2: Design the ice container and the heat exchanger, according to the specifications working together with ME 1 to validate theoretical calculations.

ME 3:Model the system using computer-based software. Collaborate with ME 1 and ME 2. Determine and acquire the components needed in the system.

CE   1

CE 1: Elaborate system that will command water flow according to the temperature readings, and the water flow specifications determined by the team. Work together with the EE 1.

ISE   1

ISE 1:Elaborate design according to the requirements so the design fits the designated space. Work on ergonomic and human factors for the system and focus on system integration.

Staffing

Project 5: Monitor and reduce CO emissions in

Ritter ArenaAlex Peterson

Functional Decomposition

CO Level

Air Temperature

Fan Speed

Emissions Log File

Parameters

Fan Health

Sensor Health

Check Hardware

Availability

Read all sensors

Load log and

parameter files

Write data and check against

appropriate range

Output results and warnings

Make adjustments if needed

Check if adjustments happened

Hardware log Health

Hardware log Health

Emissions Log File

Fan Speed

Check against CO2 required ventilation

Benchmarking

Metrics Source Function Specification (metric) Unit of

Measure Marginal

Value Ideal Value Comments/Status

S1 CN2,CN3 Monitoring Maximum 10-minute CO level in arena ppm 15 0 EPA: 9ppm for 8hr, 35ppm for 1hr max S2 CN12 Monitoring Average air temperature in arena C S3 CN12 Monitoring Relative humidity in arena % 22% From Rich Stein S4 CN2 Monitoring Sampling rate of sensor seconds 40 20

S5 CN6,CN7 Monitoring Sensor Interface - Computer, Air Controls

Computer, Air Controls Must do both for fan control and logging

S6 CN11 Monitoring Sensor Uptime % 99.6 100 S7 CN4, CN9 Monitoring Manual Override - Yes Yes If system fails, reverts to CO2+Positive Pressure S8 CN5 Logging Value log file length days 7 30 Offload at end of month to database S9 CN5 Logging Event log file length months 12 all All alarms/threshold events should be recorded S10 CN1 Installation Sensor Cost $ 400 300 Purchased part S11 CN1 Installation Interface Cost $ 100 50 Designed circuit S12 CN10 Installation Downtime during installation days 2 1 Ice down in June, no Zamboni or games then S13 CN8 Installation Design Lifespan years 10 20 In-line with current equipment

S14 CN2 Analysis Handheld CO detectors units 1 4 Would like to measure at 4 corners, but would use entire budget

S15 CN2 Analysis Data Points Taken/Run points 20 100 Depends on run length and sampling rate of detector

S16 CN2 Analysis Handheld Detector Data Logging - No Yes Could be manually recorded S17 CN2 Analysis Number of Runs units 2 4 Spread out like a game

House of Quality

Discipline How Many? Anticipated Duties

ME 2

1,2- Obtain arena emissions and airflow data1- 1st order transient model of airflow in arena1- Compare to collected data2- Design mounting bracket for sensor and interface circuit2- Design enclosure for interface circuit

EE 1Design circuit to convert mA level DC output from sensor to interface with air handler control system. Research current air handler control system.

CE 1 Computer interface chip selection, develop basic program to log emissions data

Staffing

Use handheld detector(s) to measure Map arena well to find hotspots of emissions Place sensor in worst part Interface with controller may be possible if

bill of materials and design complete

Customer Feedback

Questions?