Heat source switching method of surface water source and air source composite heat pump hot water system

Abstract

The invention provides a heat source switching method of a surface water source and air source composite heat pump hot water system. The heat source switching method comprises the following steps of using Origin software to fit the annual air temperature and the surface water temperature of a to-be-applied-to region so as to obtain a correlation equation of Tw=a+b*Ta; determining curves of actualperformance parameters, changing with the change of the heat source temperature, of a heat pump main machine in a surface water source heat pump hot water system and a heat pump main machine in an airsource heat pump hot water system; according to the actual performance changing curves of the heat pump main machines, calculating the energy consumption of the surface water source heat pump hot water system and the air source heat pump hot water system under different climate working conditions, namely, different outdoor temperatures, and then performing comparative analysis; and according to calculation results and analysis, drawing temperature-unit heating capacity energy consumption curves, and finding out an crossed area so as to find out a crossing point of the two curves to determinea heat source switching operation point. According to the heat source switching method, the heat pump hot water system with lower energy consumption is adopted correspondingly to supply heat based onthe actual outdoor air temperature, so that the comprehensive energy consumption of the system is reduced, and it is guaranteed that the heat pump hot water systems can work continuously and efficiently.

Description

【Technical field】 [0001] The invention relates to a heat source conversion method in the field of heat pump hot water systems, in particular to a heat source conversion method for a surface water source and air source composite heat pump hot water system. 【Background technique】 [0002] Building hot water systems mostly use electric boilers, coal-fired boilers, oil-fired boilers or heat pump hot water systems; and because electric boilers, coal-fired boilers, and oil-fired boilers provide heat by consuming electricity, coal and oil respectively, there is a high cost , Pollution problems, therefore, currently encourage the use of heat pump hot water system. [0003] There are many forms of heat pump hot water system, such as surface water source heat pump hot water system, air source heat pump hot water system and soil source heat pump hot water system. In buildings that need hot water throughout the year (such as hotel buildings), the existing heat pump water heating system...

AI Technical Summary

Problems solved by technology

In buildings that need hot water throughout the year (such as hotel buildings), the existing heat pump water heating system either uses a single air source heat pump water heating system or a single surface water source heat pump water heating system; Temperature changes throughout the year, it is difficult for this single hot water system to work continuously and efficiently

[0004] And as we all know, the air temperature and surface water temperature change all the time, sometimes the air temperature is higher than the surface water temperature, and sometimes the air temperature is lower than the surface water temperature; The working efficiency of the hot water system is high; if the heat source is converted between the two, it can ensure that the heat pump hot water system can work continuously and efficiently, but this part of the technology or method has not been reported yet

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