Solar energy, ground source heat pump and boiler combined heating and cooling system

Abstract

A solar energy, ground source heat pump and boiler combined heating and cooling system comprises a solar heat collection system, a plate heat exchanger, a boiler, a soil heat exchanger and a heat pump unit, wherein the solar heat collection system comprises a solar thermal collector, a water tank and a heat collection box; the heat pump unit comprises an evaporator side and a condenser side; the evaporator side comprises a first evaporator side connector and a second first evaporator side connector; the condenser side comprises a first condenser side connector and a second condenser side connector; one side of the plate heat exchanger is communicated with the heat collection box; a plate heat exchanger outlet and a plate heat exchanger inlet are formed in the other side of the plate heat exchanger; the plate heat exchanger outlet is communicated with the inlet of a user water utilization system through a fifth valve; and the outlet of the user water utilization system is communicated with the plate heat exchanger inlet through a second water pump. By adopting the system, the investment cost of a ground source heat pump is reduced, the running cost is reduced, centralized heating and cooling demands of large-area buildings of different functions and types are met and the problem that cooling and heating loads are not balance in the whole year is solved.

Description

technical field

[0001] The invention relates to the technical field of energy saving and environmental protection, in particular to a composite heating and cooling system of solar energy, ground source heat pump and boiler. Background technique

[0002] As efficient and non-polluting new energy sources, geothermal energy and solar energy have become important energy sources to alleviate the pressure on energy demand. Due to its own characteristics, the ground source heat pump system has its best applicable geographical range, that is, areas with hot summer and cold winter and equal cooling and heating loads in winter and summer. In cold areas, because the heating load in winter is greater than the cooling load in summer, the heat absorbed by the heat pump from the underground soil is greater than the heat discharged to the soil in summer, resulting in a gradual decrease in soil temperature, resulting in the steam generated by the ground source heat pump unit in winter. The ...

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