ph4019 shatin tsung tsin secondary school project holders: fan chun kit (felix) hui chun kit...
TRANSCRIPT
![Page 1: PH4019 Shatin Tsung Tsin Secondary School Project Holders: Fan Chun Kit (Felix) Hui Chun Kit (Gibson) Li Miu Yin (Winnie) Sze Kam Fung (Sam)](https://reader036.vdocuments.site/reader036/viewer/2022081519/56649e715503460f94b6ff9c/html5/thumbnails/1.jpg)
PH4019Shatin Tsung Tsin Secondary School
Project Holders: Fan Chun Kit (Felix) Hui Chun Kit (Gibson) Li Miu Yin (Winnie) Sze Kam Fung (Sam)
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40th Joint School Science Exhibition Competition
Scientific solutions for the green revolution
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Our problems
-Problems we are facing now
-Pollution
-Global warming
-Energy Crisis
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Our target
-Reduce the use of electricity by using
-Auto lighting system
-Air directing system
-Solar-heating system
![Page 5: PH4019 Shatin Tsung Tsin Secondary School Project Holders: Fan Chun Kit (Felix) Hui Chun Kit (Gibson) Li Miu Yin (Winnie) Sze Kam Fung (Sam)](https://reader036.vdocuments.site/reader036/viewer/2022081519/56649e715503460f94b6ff9c/html5/thumbnails/5.jpg)
Auto lighting system
Aims
- Reduce extra lighting
- Maintain a comfortable lighting environment
![Page 6: PH4019 Shatin Tsung Tsin Secondary School Project Holders: Fan Chun Kit (Felix) Hui Chun Kit (Gibson) Li Miu Yin (Winnie) Sze Kam Fung (Sam)](https://reader036.vdocuments.site/reader036/viewer/2022081519/56649e715503460f94b6ff9c/html5/thumbnails/6.jpg)
Auto lighting system
Model
![Page 7: PH4019 Shatin Tsung Tsin Secondary School Project Holders: Fan Chun Kit (Felix) Hui Chun Kit (Gibson) Li Miu Yin (Winnie) Sze Kam Fung (Sam)](https://reader036.vdocuments.site/reader036/viewer/2022081519/56649e715503460f94b6ff9c/html5/thumbnails/7.jpg)
Auto lighting system
Components1. Sensors2. Control Unit3. LED Lighting
- LED- Frame- LED Driver
4. Blinds and motor
![Page 8: PH4019 Shatin Tsung Tsin Secondary School Project Holders: Fan Chun Kit (Felix) Hui Chun Kit (Gibson) Li Miu Yin (Winnie) Sze Kam Fung (Sam)](https://reader036.vdocuments.site/reader036/viewer/2022081519/56649e715503460f94b6ff9c/html5/thumbnails/8.jpg)
Auto lighting system
Sensors
-Detect light intensity
-Put at different positions
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Auto lighting system
The Control Unit
- Implements negative feedback
- Controls lighting
![Page 10: PH4019 Shatin Tsung Tsin Secondary School Project Holders: Fan Chun Kit (Felix) Hui Chun Kit (Gibson) Li Miu Yin (Winnie) Sze Kam Fung (Sam)](https://reader036.vdocuments.site/reader036/viewer/2022081519/56649e715503460f94b6ff9c/html5/thumbnails/10.jpg)
Auto lighting system
LED Lighting- LED- Frame- LED Driver
- High efficiency- No Heat Produced- No UV and infra red- Long lifespan
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Auto lighting system
Blinds- Control sunlight
- Reduce heating effect
Motor- Control the blinds
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Auto lighting system
Condition 1 The light intensity is too high
The lighting becomes dimmer
Working principle
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Auto lighting system
Condition 2 The light intensity is too low
The lighting gets brighter
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Auto lighting system
Condition 3 The light intensity is extremely high
The motor will lower the blinds
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Air directing system
Aims
- To maintain a comfortable temperature in an office
- Save energy for air-conditioning
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Air directing systemModel
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Air directing system
Components1. Sensors2. Control Unit
- Manual modulator3. Fan4. Deflectors5. Motors6. Paper strips
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Air directing system
Sensors
Movement of the deflectors
- Each sensor will control only half of the deflectors
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Air directing systemControl Unit
- Negative Feedback
~used to maintain a comfortable temperature in an office
- Manual modulator
~allow people to adjust the set temperature as they want
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Air directing systemFan, deflectors and motors
-Fan and deflectors are installed in the air outlet
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Air directing systemFan
-Control the speed of the air flow
Deflectors
-Facilitate air flow
-Control air flow in local areas
Motors
-used to swing the deflectors to an appropriate position
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Air directing systemPaper strips
- use to show the direction of the air flow
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Air directing systemWorking principle
(T= Temperature sensed by one sensor, S= range of set temperature)Condition 1: T > Upper bound of S~The deflectors will be swung to the position of the sensor by the motors
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Air directing systemWorking principle
(T= Temperature sensed by one sensor, S= range of set temperature)Condition 2: T < Lower bound of S~The deflectors will be swung and closed
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Air directing systemWorking principle
(T= Temperature sensed by one sensor, S= range of set temperature)Condition 3: All T < Lower bound of S ~ the speed of fan will be decreased or even stopped
Condition 4: All T> Upper bound of S ~ the speed of the fan will increase
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Solar Pantry
Aims- To reduce the use of electricity for heating water as much as possible
- To implement a clean and renewable energy source
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Solar Pantry
Light source
Solar Panel
Model
Rubber tubing
Water tankWindow
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Solar Pantry
Components
1. Solar Panel
2. Rubber tubing
3. Water tank
4. Temperature sensor
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Solar Pantry
Solar Panel
- Use solar energy for heating
- Dark surface
- Fluid circulation assisted by convection
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Solar Pantry
Water tank
- Double- layered- Inner layer Spiral shaped, Metal coated
- Outer layer Water circulation
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Solar Pantry
Temperature sensor
- Detect water temperature- If the temp of heated
water detected < Set temp,
conventional heating
would be carried out
- Else, cool water would
be released
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Solar Pantry
Water in
Light source
Solar Panel
Temp. sensor
Rubber tubing
Water tank (Heat exchange occurs)
Heater
Cool water
Mixing tank
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Solar Pantry
Convection current
Heated water
Cooler water Water with
desired temp
![Page 34: PH4019 Shatin Tsung Tsin Secondary School Project Holders: Fan Chun Kit (Felix) Hui Chun Kit (Gibson) Li Miu Yin (Winnie) Sze Kam Fung (Sam)](https://reader036.vdocuments.site/reader036/viewer/2022081519/56649e715503460f94b6ff9c/html5/thumbnails/34.jpg)
The End