3. disadvantages of water loop heat pump air conditioning system
The development of the air conditioning system of water loop heat pump mainly faces two problems: one is from the aspect of the system, some domestic buildings have little or no residual heat, and need to supplement heating equipment, so that they can not give full play to some of the original advantages; the other is from the aspect of the equipment, the small water / air heat pump unit used in the air conditioning system of water loop heat pump Some inherent problems also limit its wider application. At present, in view of the above two shortcomings, there are many solutions to promote the application of water loop heat pump air conditioning system.
3.1 insufficient residual heat in the building
Through the analysis of the operation characteristics of the water loop heat pump air conditioning system, we can know that only when there is a large amount of waste heat in the building area and the surrounding area needs heating, can the waste heat in the building area be transferred to the surrounding area that needs heat through the water loop heat pump air conditioning system, so as to achieve the purpose of recovering the building waste heat and saving energy. However, the internal load of all kinds of buildings in our country is not large, and the area of the internal area of buildings is small, so the amount of waste heat of buildings is also small. In this case, if the water loop heat pump air conditioning system is to be used, it is necessary to add boilers. However, it is uneconomical and unreasonable to heat the circulating water in the water circulation loop with the high-level heat energy of the boiler to become a low-temperature heat source which is almost the same as the room temperature, and then use the electric energy of the water / air heat pump unit to raise it to the high-level heat for indoor heating. In addition, if the coal-fired boiler is used, there is still a problem of environmental pollution.