November 10, 2013
Air source heat pumps are the mainstream form of heating at present. Air source heat pumps absorb heat from the air and then convert it into thermal energy, which makes air source heat pumps more energy-saving than other heating equipment. So how much power does an air source heat pump consume?
The power consumption generated by air source heat pump heating is mainly determined by the input power of the air source heat pump itself, and is also affected by factors such as regional climate, terminal matching type, and house insulation conditions.
1. Regional climate
Because the temperature and humidity in each region are different, it mainly depends on the average ambient temperature and humidity of the city where winter heating is located. The air source heat pump heating energy efficiency ratio is different for ambient temperatures such as -12℃ and -25℃.
The national standard stipulates that at -12℃, the outlet water temperature is 41℃, the energy efficiency ratio must not be lower than 2.1, and it can be started normally at minus 25℃. The power consumption generated by air source heat pump heating at these two ambient temperatures is different. In addition, the humidity of the weather will also determine the frequency of frost formation of the unit, and frost defrosting will increase the power consumption of the heat pump.
2. Terminal type
The heating terminal of the air source heat pump will affect the power consumption, because the outlet water temperature required by the heating terminal is different.
For example, for floor heating radiation, the outlet water temperature only needs to be 35-40℃, fan coil heating is generally 40-45℃, and the radiator is above 55℃. The outlet water temperature required by the old cast iron radiator is even higher. The higher the outlet water temperature, the higher the power consumption. Therefore, the air source heat pump with underfloor heating can be said to be the most energy-saving.
3. House insulation
The insulation of the building will affect the calculation of the heat load. For buildings with poor insulation, heat loss needs to be considered when designing and selecting air source heat pump heating, which generally increases the heat load value. Therefore, for buildings with good insulation, the power consumption of air source heat pump heating is less.
To sum up, the power consumption of air source heat pumps will be related to the regional climate, building insulation conditions, and terminal matching type (water outlet temperature), and there is no fixed power consumption standard.
