Solar photovoltaic heat pump system

Abstract

The invention relates to a solar photovoltaic heat pump system, which comprises a solar photovoltaic electricity generation system, a recycle cooling system and a heat pump hot water system. A waterside inlet of an evaporator is connected with an inlet branch of a condenser through a branch, a fourth temperature control valve is arranged in the middle part, a cooler is pasted on the back of a photovoltaic component, an outlet of the cooler is respectively connected with a hot water storage tank and a constant-temperature water tank through a second temperature control valve and a first temperature control valve, a left side branch in the lower part of the hot water storage tank is connected with the cooler through a first recycle water pump, a right side branch in the upper part of the hot water storage tank is connected with the waterside inlet of the evaporator through a second recycle water pump and a third temperature control valve, an outlet of the evaporator is connected with the lower right side of the hot water storage tank through a pipe, the waterside inlet of the evaporator is connected with a third recycle water pump and the constant water tank in series through the pipe, a refrigeration loop of the evaporator is connected with a regenerator and is connected with an air entry and an exhaust outlet of a compressor through a liquid storage tank, and the inlet and the outlet of the condenser is connected with the evaporator entry through the regenerator and the electronic expansion valve.

Description

technical field [0001] The invention relates to a solar photovoltaic heat pump system, in particular to a combined solar photovoltaic heating and cooling system. Background technique [0002] At present, reports on solar photovoltaic heat pumps are relatively rare. The well-known similar reports are the invention patent "solar heat pump refrigeration and photovoltaic photoelectric integrated device", which was announced by the State Intellectual Property Office of China in 2006 and applied for by Xu Haiying and Zhang Xiaosong of Southeast University. The patent number is CN 1862148A, and the application number is 200610085449.8; the patent is mainly to use the direct expansion solar heat pump evaporator as a cooling backplane and combine it with the battery board to form a photovoltaic / heat collecting plate, and the purpose is to collect the energy of the photovoltaic / heat collecting plate through the heat pump cycle. Heat, on the one hand, improves the efficiency of the hea...

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Problems solved by technology

[0003] (1) It is difficult to solve the matching problem between photovoltaic panels and heat pumps. Since there is a large difference in the quantity between the photoelectric conversion of panels and the collection of light and heat, often if the capacity of photovoltaic / heat collector panels can guarantee it The amount of heat collected by the heat pump meets the needs of the heat pump for evaporation and heat absorption, so the electricity generated by the photovoltaic / thermal collector plate under this capacity is far from enough for the heat pump to consume, and if the power generation of the photovoltaic / thermal collector plate can meet the heat pump consumption, Then the amount of heat collected by the photovoltaic / heat collector panels under this capacity will be much greater than the heat pump needs for evaporation, resulting in the fact that it is difficult for the solar panel to be cooled

[0004] (2) It directly couples the photovoltaic module and the evaporator, so it is difficult to solve the problem of mutual restraint between the heat pump and the photovoltaic module, so that the actual operation of the heat pump is seriously affected by solar radiation and the stability is poor; while the photovoltaic module The floor area is often large, the refrigerant circuit of the evaporator is too long, and the pressure loss is large, thereby reducing the performance of the heat pump. In addition, the installation site of the system is often limited

[0005] (3) The structure of its photovoltaic / heat collector plate is that the evaporation coil is embedded in the interlayer between the solar photovoltaic module and the heat collector plate. The evaporation coil and the battery plate are in line contact, and the heat transfer effect is not good. Therefore, the cooling effect of photovoltaic modules is not ideal, and the temperature uniformity is poor

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