Sep 23 2023, 08:45 AM
QUOTE(goolie @ Sep 20 2023, 10:16 AM)
Does the aircon temperature affect electricity consumption? How much electricity do I save by setting the home air conditioner temperature one degree Celsius higher? Let say from 23 degree to 24 degree. How many percent can save from electricity bill for each degree higher? 3 to 5 % cut?
Heard that running at 24 degrees, the compressor will work for much less time, leading to less power consumption. Once the desired temperature is reached, the compressor stops functioning, and only the AC fan works. The compressor restarts once the thermostat detects increase in temperature. Is that true? Is there any facts or data research on this?
Are you even using an inverter? If not then there is no point discussing this.Heard that running at 24 degrees, the compressor will work for much less time, leading to less power consumption. Once the desired temperature is reached, the compressor stops functioning, and only the AC fan works. The compressor restarts once the thermostat detects increase in temperature. Is that true? Is there any facts or data research on this?
A non inverter is basically on and off state. Hence it cuts off power to the compressor when your room reached the set temperature. It will restart the compressor when it went above your set temperature. An inverter works differently. Even before it reached the set temperature, the compressor already start to reduce power consumption when the room gets close to the set temperature and the compressor never turn off. It basically just run at a very low power mode when it reached your set temperature and increase it slightly when it goes above it later. So instead of being 0% (off) or 100% (on), it could be running at 20% when it reached set temperature, and then ramp up to 40% or 60% when the temp increase.
It is very hard to prove exactly how much you will save since everyday is different and not a controlled environment like a lab. On a hot day, the ac would have to work harder to lower the room temperature which would lead to higher energy usage. For example, past few days has been quite chilly. I have set the ac (Samsung Windfree Premium 1hp) in my son's room (10x12ft) to turn on at 840pm and turn off at 500am. Temp set is 25C. Power usage tracking in smarthings app record daily usage around 1.2~1.3kWh. Normally it would not be so low. On a normal day with real good sunlight, it normally record around 1.7~2.2kWh daily.
One thing that I cant say for sure is whether using inverter will help you save since most ac were tested in a controlled lab environment to cool until 25C. Yours is set to 23C and it would take longer time to reach said temperature and keep it there especially on a hot day. Inverter or non inverter would end up using the same amount of power if it never reach or get close to the set temp. Just like my mom who kept complaining high electricity bill. She dont understand why she needs to change to 24/25c from her 20c. Basically her inverter ac just run at full power consuming almost 1kWh per hour. Basically identical power usage compared to a non inverter.
To give you an example of how much 1C would use, I used to set my son ac at 26C and the daily power usage is around 1.2~1.7kWh. Another point to remember is that ac performance deteriorate as you run it due to dust and clogged blower. I just cleaned my son ac blower with compressed air and brush a week ago since the power usage double despite the same setting.
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