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

A heat pump hot water and conversion method technology, applied in residential hot water supply systems, heating systems, heating methods, etc., can solve problems such as no relevant reports, high work efficiency, lower than surface water temperature, etc., and achieve significant energy saving efficiency, reducing the overall energy consumption of the system, and the effect of continuous and efficient work

A heat pump hot water and conversion method technology, applied in residential hot water supply systems, heating systems, heating methods, etc., can solve problems such as no relevant reports, high work efficiency, lower than surface water temperature, etc., and achieve significant energy saving efficiency, reducing the overall energy consumption of the system, and the effect of continuous and efficient work

CN109827232AInactive Publication Date: 2019-05-31FUJIAN UNIV OF TECH
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  • Heat source switching method of surface water source and air source composite heat pump hot water system
  • Heat source switching method of surface water source and air source composite heat pump hot water system
  • Heat source switching method of surface water source and air source composite heat pump hot water system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1, taking the Shanghai area as an example:

[0032] (1) Using Origin software to fit the annual air temperature and surface water temperature in Shanghai area, the following correlation formula is obtained:

[0033] T w1 =2.19951+0.9298×T a1 ;

[0034] Among them, T w1 is the hourly temperature of surface water in Shanghai area, T a1 is the hourly temperature of the air in the Shanghai area;

[0035] (2), draw the heat pump main engine in the surface water source heat pump hot water system and the heat pump main engine of the air source heat pump hot water system with the outdoor climate change curve, that is, the curve of the performance parameter COP changing with temperature, such as figure 1 shown;

[0036] (3) According to figure 1 Calculate and compare the energy consumption of two hosts under different climatic conditions, that is, different outdoor temperatures;

[0037] (4) draw the temperature-unit heating energy consumption curve according ...

Embodiment 2

[0039] Embodiment 2, taking the Fuzhou area as an example:

[0040] (1) Using Origin software to fit the annual air temperature and surface water temperature in Fuzhou area, the following correlation formula is obtained:

[0041] T w2 =7.98438+0.47368×T a2 ;

[0042] Among them, T w2 is the hourly temperature of surface water in Fuzhou area, T a2 is the hourly temperature of the air in Fuzhou;

[0043] (2), draw the heat pump main engine in the surface water source heat pump hot water system and the heat pump main engine of the air source heat pump hot water system with the outdoor climate change curve, that is, the curve of the performance parameter COP changing with temperature, such as image 3 shown;

[0044] (3) According to image 3 Calculate and compare the energy consumption of two hosts under different climatic conditions, that is, different outdoor temperatures;

[0045] (4) draw the temperature-unit heating energy consumption curve according to the calculati...

Embodiment 3

[0047] Embodiment 3, taking the Chongqing area as an example:

[0048] (1) Using Origin software to fit the annual air temperature and surface water temperature in Chongqing area, the following correlation formula is obtained:

[0049] T w3 =-0.45706+1.46734×T a3 ;

[0050] Among them, T w3 is the hourly temperature of surface water in Chongqing area, T a3 is the hourly temperature of the air in Chongqing;

[0051] (2), draw the heat pump main engine in the surface water source heat pump hot water system and the heat pump main engine of the air source heat pump hot water system with the outdoor climate change curve, that is, the curve of the performance parameter COP changing with temperature, such as Figure 5 shown;

[0052] (3) According to Figure 5 Calculate and compare the energy consumption of two hosts under different climatic conditions, that is, different outdoor temperatures;

[0053] (4) draw the temperature-unit heating energy consumption curve according t...

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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...

Claims

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Application Information

Patent Timeline
31 May 2019
Publication
CN109827232A
IPC
F24D17/02; F24D19/10
Inventors
蒋小强; 陈雪淇