Air source heat pump water supply at different temperatures, used in different scenarios
2022-05-13
Air energy heat pump technology has a history of more than 30 years. With the continuous breakthrough and improvement of technology, air energy heat pump technology is also used in many fields. In recent years, with the continuous advancement of coal-to-electricity projects, air-energy heat pumps have developed rapidly in the heating industry. As we all know, the air energy heat pump uses the water cycle as the heat transfer medium, and the water temperature can be processed to between 0°C and 90°C. Therefore, it can be applied in different scenarios under different outlet temperature conditions.
Air energy is mainly used for scene and temperature. The temperature is 15 ℃-20 ℃ central air conditioning refrigeration. Ordinary central air conditioners focus on cooling, and air heat pumps are mainly used for heating, but the wide water capacity of air heat pumps makes them have good cooling and heating capabilities. When working in summer, the evaporator area, air change and fin area of the air heat pump are much larger than those of the ordinary central air conditioner. Through the four-reversing valve conversion, the outdoor host evaporator enters the condenser, and the heat dissipation area of the condenser is larger than that of the ordinary central air conditioner, and the heat dissipation performance is large. The cooling effect is not as good as that of the ordinary central air conditioner, the water system air conditioner is soft, the temperature difference is small, the indoor humidity is small, and the indoor cooling temperature is also higher than that of the ordinary central air conditioner. The swimming pool has constant temperature hot water with a temperature of 26°C-28°C. With the improvement of living conditions, more and more people pay more attention to the comfortable family life. They also need to swim in winter, but the water temperature of the swimming pool is required. Compared with the traditional boiler plate changer to heat the swimming pool, it can play a good constant temperature effect, but the boiler does not burn low-temperature water strongly, which will bring frequent startups and low combustion efficiency. Save more than half. Floor heating and domestic hot water with a temperature of 35℃-50℃. The best state of the air source heat pump is to provide hot water below 45°C. At this time, the air energy heat pump has a higher energy efficiency ratio, stronger energy saving and more stable operation. This is also the main reason why air-energy heat pumps are used in large systems of domestic hot water (schools, dormitories, hotels, factories, etc.). It is often said that the temperature of the water supply for floor heating is between 50°C and 60°C, which is also the most efficient period for wall-hung boiler heating. When the floor heating water temperature reaches 45 ℃, the heating efficiency is already very high. Air source heat pump floor heating adopts the method of small flow rate and large temperature difference. Compared with electric heating, the monthly heating cost can be saved by more than 50%, and compared with gas wall-hung boiler heating, it can also be saved by more than 30%. If the indoor floor heating with better heat dissipation performance is used, the water supply temperature of the air energy heat pump can be reduced to 35 °C, and the energy saving performance will be higher. Agricultural greenhouses and animal husbandry where the temperature is around 50°C. In winter, agricultural greenhouses and animal husbandry require a temperature of about 50 °C. Traditional heating equipment needs to use coal-fired hot blast stoves, which not only consumes high energy and pollutes a lot, but also requires uninterrupted protection by special personnel. The temperature cannot be stable for a long time, and temperature fluctuations can easily cause serious problems. The use of other electric heating equipment also has the problem of high energy consumption, and there is a safety risk. The air energy heat pump can use floor heating, radiator and fan coil, which not only heats relatively uniformly, but also has a relatively fast heating speed, and can intelligently sense and control the temperature in the shed. The safety risk is relatively small, and no special management is required. Of course, the initial investment in air energy heat pump equipment will be larger, but the stability of heating reduces the risk of losses due to temperature fluctuations, and the energy consumption is relatively lower and cleaner. A radiator system with a temperature of 65°C-80°C. A radiator is one of the ends of an air heat pump heating. The hot water flows in the radiator, which releases heat and increases the indoor temperature. There are many materials for radiators, including iron radiators, steel radiators, copper-aluminum composite radiators and copper radiators. Since the heat transfer mode of the radiator belongs to convection and radiation, there is no fan coil unit, the hot air blows fast, and the temperature of the floor heating is uneven. Therefore, in order to reach the indoor temperature, the radiator needs to provide a water temperature above 60°C to meet the indoor heat demand. Using an air source heat pump to drive a radiator requires more electrical energy in exchange for heat. The larger the size of the house, the more radiators are required and the higher the energy consumption. At this time, the radiator is used as the heat dissipation end, and it is difficult for ordinary air energy heat pumps to achieve energy saving, and high temperature overlapping heat pumps need to be used. The applications of air heat pumps include domestic and commercial domestic hot water, heating, refrigeration, constant temperature greenhouse, drying, drying, high temperature heat pump, industrial heat pump, constant temperature storage, complementary energy, waste heat recovery and other fields, and based on heating technology, continue to extend outward , has penetrated into the home appliance industry, air conditioning industry, solar energy industry and electric heating industry and other fields. With the importance of energy conservation, emission reduction and clean energy in all walks of life, the application fields of air heat pumps are still increasing
