Wifi-enabled solar heating Jostedal Lau Daniel Yeo St Josephs - PowerPoint PPT Presentation

Wifi-enabled solar heating Jostedal Lau Daniel Yeo St Joseph’s Institution

INTRODUCTION

Solar Energy ● Abundant and renewable ● Not efficient ● Uses only 20% of solar energy

Aims ● Hybrid solar panel utilising Peltier Coolers ● Heats water to 60 Degrees Celsius

PROTOTYPE

Materials used ● Utilises Peltier effect ○ Transfers heat Peltier cooler in between metal pipes

DESIGN

Design Of Prototype Side view of prototype View of circuit inside solar panel

Diagram of Prototype Solar Panel Aluminium Peltier Cooler Metal Rod Water from tank Water to tank

EXPERIMENTS

Testing set-up ● Solar panel was replaced with hot water from water bath ● Peltier Cooler powered by DC power supply ● Peltier Cooler transfers heat from hot water to tap water

Testing set-up Set-up used for testing.

Design of set-up Room temperature water from tank Clamp Temperature sensor (thermistor) Pipes Peltier cooler (cool side facing down, hot side facing up) Hot water drained to sink From water bath To water bath Diagram of set-up used to collect data

METHODOLOGY

Methodology ● Water bath temperature at 30 to 70 Degrees Celsius ● Peltier cooler powered with 7.6 to 8.3 Watts ● Final temperature of tap water was stabilised before recorded ● Experiment was done thrice for the average

Methodology ● Flow rates of 0.40 and 1.6 grams/s ● Clamp to control the flow rate of water ● Flow rates measured by collecting the volume of water in 30 seconds then dividing it by 30. ○ average flow rate was obtained after repeating it thrice.

Methodology ● Temperature change and Coefficient of Performance were calculated ● COP = KW heating / KW electricity ● If the COP is above 1, it means that output energy is more than input energy.

RESULTS

Results Table of results

Results Graph of change in temperature versus water bath(solar panel) temperature

Results Graph of coefficient of performance (COP) versus water bath(solar panel) temperature

Results

Practicality ● Slow flow rate is negated by multitude of solar panels ● More Peltier Coolers will be used ● Possible to reach 60°C

EXPERIMENT TWO

Second Test ● Checks for usefulness of Peltier Cooler ● Set-up was similar, one had a Peltier Cooler on while the other did not ● The difference in temperature change for both experiments were drastic

RESULTS

Results (2nd experiment) When the Peltier Cooler is off

Results (2nd experiment) When the Peltier Cooler is on

CONCLUSION

Conclusion ● Hybrid solar panel is viable ● Large scale project is required for residential use

LIMITATIONS

Limitations ● Set-up has not tested in actual conditions ○ Results are not 100% accurate ● The temperature sensors were also not properly calibrated. ○ Although factored in standard deviation and power calculation, it could be inaccurate

FURTHER STUDIES

Further Studies ● System of storing the heated residential water should be developed. ● Solar panels must recirculate the tap water till 60 Degrees Celsius ● System to monitor the solar heater hybrid for convenience Wifi-Enabled Progression will be useful

Acknowledgements We would like to thank the following people for helping us to complete the project: Professor Lee Choon Kiat, our Supervisor Mr Ng Shu Lit, our Teacher Mentor