I often get asked if air source saves electricity? How much electricity does it consume in a day? How much electricity does it cost to use it for one heating season? Don't worry, here's an analysis of exactly how much electricity an air source consumes.
The difference with traditional heating equipment is that an air to air heat pump is powered by a small amount of electricity to drive a compressor, which absorbs heat from the air in order to produce heat. Therefore, the higher the ambient temperature, the less power it consumes. When the ambient temperature is above 7°C, the energy efficiency of an air source heat pump can be around 3.7, i.e. it can absorb 3.7kW of heat per kWh.
The
consumption of the air source also depends on the power input of the
air source itself. It is assumed that the air energy for a 1kW power
input (i.e. a 1P machine) is 1kWh per hour under standard operating
conditions. at low temperatures, as the unit is susceptible to frost, it
will need to consume a proportion of its own heat to defrost the unit,
which will result in an increase in the power consumption per hour,
which is typically no more than 1.5 times the rated power, i.e. 1.5kW.
Therefore, in order to reduce the consumption of air energy, the use of
air-powered units with high energy efficiency and can produce more heat
under the same conditions of power consumption. Current air source heat
pump manufacturers produce 3 HP units with a power consumption of about 2
degrees per hour.
For
example, a one hundred square meter home with good insulation would
require an air source heat pump 5hp unit rated at 3.6kW, or 3.6 degrees
per hour. Of course, this is in the case of high-frequency operation,
when the indoor temperature reaches the set temperature, inverter air
source can be turned to low-frequency operation, this time the power
consumption will be very low, a day of 24 hours of operation of about 50
degrees of electricity.
Of
course, even with the same heating area and the same choice of heating
equipment, there may be a big difference in operating costs because the
house is insulated and the operating costs are closely related. A
well-insulated home will not consume much heat after the temperature is
set. If the home is poorly insulated and dissipates too much heat, the
air source heat pump will need to run at a high frequency and will use
much more energy. This is why heating costs are lower in the North than
in the South for the same floor space.
However,
for air source heat pumps, there is no problem. The South is not
insulated, but the ambient temperature is higher than in the North. The
energy efficiency of heat pumps is much higher than in the North.
Below is a cost reference for the heating season for an air source heat pump:
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