1. overview of water loop heat pump air conditioning system
Water loop heat pump air conditioning system refers to an application mode of small water / air heat pump unit, that is, the water loop connects small water / heat pump units in parallel to form a closed loop, forming a set of heat pump heating and cooling air conditioning system which recovers the internal residual heat of the building as its low-level heat source. A typical water loop heat pump air conditioning system consists of three parts: (1) indoor small water / air heat pump unit; (2) water loop; (3) auxiliary equipment (such as cooling tower, heating equipment, heat storage device, etc.).
The basic working principle of the water loop heat pump air conditioning system is: when the water / air heat pump unit is heating, the water in the water loop is used as the heating source; when the unit is cooling, the water is used as the heat source. When the heat absorption of the heating operation of the water loop heat pump air conditioning system is less than the heat release of the heating operation, the temperature of the water in the circulation loop rises, and to a certain extent, the cooling tower is used to release the heat; on the contrary, the temperature of the water in the circulation loop decreases, and to a certain extent, the heat is absorbed by the auxiliary heating equipment. Only when the heat absorption capacity of water / air heat pump unit in heating operation and the heat release capacity of refrigeration operation are basically equal, the water in the circulation loop can be maintained in a certain temperature range, at this time, the system operates efficiently.
2. advantages of water loop heat pump air conditioning system
In the early 1980s, some water ring heat pump air-conditioning systems applied in China showed many advantages, such as the unique function of recovering the residual heat of buildings; unlike the traditional boiler, it will pollute the environment; it will save or reduce the cold and heat source equipment and machine room of the conventional air-conditioning system; it is convenient for household measurement and fee recording; it is convenient for installation and management, etc. According to the prediction and analysis of relevant literature, the water loop heat pump air conditioning system is a very promising energy-saving air conditioning system. Next, this paper analyzes the advantages of water loop heat pump air conditioning system from three aspects of the system.