Air Conditioners (A/C) use roughly 1 trillion kWh of power annually. The project seeks to reduce power consumption of A/Cs. The proposal is a movable false ceiling. It will be lowered when the occupant is sleeping to reduce the volume of the room allowing the A/Cs to cool faster. The question which had to be addressed was ‘How much will reducing the volume of the room at night using a movable false roof, reduce power consumed by air conditioners?’ The hypothesis was that there was a relation between the time taken to cool the room and its volume.
The experiment tested energy savings by using a high power A/C to cool a smaller volume. Two boxes of thermocol were built, simulating a room. The first box represented the original volume of the room. The second box’s volume was adjustable. 4 tests were conducted, changing the output temperature on the A/C and the volume of the second box in each test.
All the tests pointed to two important results:
- The lower the volume, the greater the energy saving. There was an average power saving of 0.14 kWh/hour translating into a 14% reduction in power consumption.
- The lower the A/C output temperature the greater the energy saving.
Large scale implementation of such a device will result in massive energy savings worldwide. In an escalating electricity cost scenario, this device can help households to reduce power costs without compromising on comfort.
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A Project by – Raghav Anand and Rahul GS