Photovoltaic loop heating pipe assisted twin-heat-source heat-pump heat supply system

Abstract

Provided is a photovoltaic loop heating pipe assisted twin-heat-source heat-pump heat supply system. The photovoltaic loop heating pipe assisted twin-heat-source heat-pump heat supply system mainly comprises a solar / air evaporator, a pipeline A, a valve A, a pipeline B, a compressor, a pipeline C, a pipeline D, a condenser, a valve C, a pipeline E, a solar photovoltaic-loop heating pipe evaporator, a pipeline F, a valve D, a pipeline G, a pipeline H, a valve B and a capillary tube. According to the operation mode of a heat pump, solar energy and air are adopted as heat sources, the defect that an air source heat pump has low operation efficiency or can not operate in a low temperature environment is overcome, and the problem that the area of a heat collector in a common solar auxiliary heat-pump heat supply system is too large is solved; by arranging the evaporator in the loop heating pipe mode and the evaporator in the heat pump mode in a split mode, mismatch between the condenser and the evaporators when the two modes share the condenser is avoided; and the overall structure is simple, the solar photo-thermal utilization integrated conversion efficiency can be improved sufficiently, external power supply of the system is achieved, and the energy consumption of the heat supply system for buildings is approximately zero.

Description

technical field [0001] The invention belongs to the technical field of building energy saving, and relates to a heat supply system with a dual heat source heat pump. Background technique [0002] The water temperature prepared by the solar photovoltaic photothermal heat collection system is generally lower than the outlet water temperature of the traditional solar hot water system. Coupled with the influence of weather factors, the hot water prepared by the solar photovoltaic photothermal heat collection system usually cannot meet the heating requirements of buildings. temperature requirements. The operating performance of air source heat pumps is greatly affected by the outdoor temperature, especially in cold and severely cold regions in winter, there will be frosting problems, which will cause the performance of the heat pump to decline or even fail to work normally. In the existing technology combining heat pipe, solar energy and heat pump, when the heat pump and heat pi...

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Problems solved by technology

[0002] The water temperature prepared by the solar photovoltaic photothermal heat collection system is generally lower than the outlet water temperature of the traditional solar hot water system. Coupled with the influence of weather factors, the hot water prepared by the solar photovoltaic photothermal heat collection system usually cannot meet the heating requirements of buildings. temperature requirements

The performance of the air source heat pump is greatly affected by the outdoor temperature, especially in cold and severe regions in winter, there will be frosting problems, which will cause the performance of the heat pump to decline or even fail to work normally

In the existing technology combining heat pipe, solar energy and heat pump, when the heat pump and heat pipe modes share the same condenser, the mismatch between the evaporator and the condenser is prone to occur due to the large difference in the working conditions of the two modes; and the existing evaporator The structural form of the device is not conducive to the effective use of solar energy and air energy at the same time

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