June 2, 2025
The working principle of the air source heat pump unit is to absorb low-temperature heat in the air to produce heat energy. The electricity is only an auxiliary role in the whole process, and there is no pollution; the water and electricity are completely isolated during operation, and the heat is conducted by copper pipes, which is absolutely safe; the main heat in the working process is obtained from the air, and the electric heat energy is also converted into heat, so the cost of heating the same volume of hot water is very low. Let's analyze the energy consumption and cost of using air source heat pumps in the constant temperature case of Inner Mongolia, China.
1. Analysis of the operating cost of air source heat pumps
According to the specific operation of the builder, the pools are used in part in different time periods, so this operating cost analysis is calculated based on the simultaneous use of all pools.
The 12 pools are open for 12 hours a day (9:00-21:00), with a total constant temperature of 41°C and a heat supply of 917kW/h. The unit operation time is calculated as 6 hours. The non-business hours (21:00-9:00) are 12 hours in total, with a constant temperature of 30°C and a heat supply of 400kW/h. Considering the lower temperature in the morning and evening, the machine operation time is calculated as 8 hours. The initial heating of the pool is 1027Kw/h, and the number of water changes is designed to be 3 times a month. The annual operation time is from May 1st to October 1st, for a period of 6 months. The unit's energy efficiency COP is 4.3 during the daytime business hours in summer and autumn, and the unit's energy efficiency ratio is 2.8 during non-business hours.
Details of local peak-valley electricity prices:
0:00-5:00 0.45 yuan/kWh (valley); 5:00-7:30 0.95 yuan/kWh (average);
7:30-11:30 1.25 yuan/kWh (peak); 11:30-17:30 0.95 yuan/kWh (average);
17:30-21:00 1.25 yuan/kWh (peak); 21:00-24:00 0.45 yuan/kWh (valley);
2. Calculation of air source heat pump operation cost:
Bathroom temperature during business hours:
Daily peak power consumption: 917kW/h×4÷4.3=853kW, electricity fee 853×1.25=1067 yuan
Daily average power consumption: 917kW/h×2÷4.3=427kW, electricity fee 609×0.95=406 yuan
Daily electricity cost: 1067+406=1473 yuan
Bathroom temperature during non-business hours:
Daily constant temperature operation power: 500kW/h×3.5÷2 .8=625kW
Electricity required for daily constant temperature: 625×0.45=282 yuan
Electricity required for daily heating: 825×3.5÷2.8=1032kW; 825×1÷4.3=192Kw;
1032+192=1224Kw
Electricity required for daily heating: 1032÷3.5×0.5×0.45=67 yuan; 1032÷3.5×2.5×0.95=700 yuan;
1032÷3.5×0.5×1.25=185 yuan; 192×1.25=240 yuan; a total of 1192 yuan.
Daily operation cost of the pool: 1473+282+1192=2947 yuan.
First heating of the pool:
Each operation power consumption: 1050kW/h×18÷4.3=4400kW; 1050×30÷2.8=11250kW
In general, air source heat pumps are better than electric water heaters and bring higher value. Of course, air source heat pumps also have disadvantages, such as large size and other problems. Consumers should choose the air source heat pump that suits them when purchasing. Each brand has its own characteristics: good quality, good service, or high cost performance, and they also need to consider their actual situation. This is what the editor shared, I hope it will be helpful to everyone.
