Photoelectric complementary multi-stage heating flash evaporation compression type and air source heat pump heat supply system

Abstract

The invention discloses a photoelectric complementary multi-stage heating flash evaporation compression type and air source heat pump heat supply system which comprises a heat supply network circulating water pipe provided with a heat supply network circulating water pump. A solar heat collection system, an air source heat pump system, a negative pressure flash evaporation type sewage source heat pump system and a heat storage tank are sequentially communicated with a heating section of the heat supply network circulating water pipe in the flowing direction of return water. The solar heat collection system comprises a shell-and-tube heat exchanger, a hot oil circulating pump and a groove type solar heat collector. The solar heat collector, the compression type heat pump, the flash tank and the heat storage tank are combined, low-grade heat energy in air and domestic sewage is utilized, deep recovery of available waste heat of a user side is achieved, heat supply network circulating water return water is heated in a cascade heating mode, the working temperature difference of all stages of heat pumps is reduced, the COP of the heat pumps is improved, and the power consumption of the heat pumps is reduced; meanwhile, a solar heat collector is configured to replace heat pumps of different heating sections under different illumination intensities, and a heat storage tank is configured to further reduce the heating cost by utilizing peak and valley electricity prices.

Description

technical field [0001] The invention belongs to the technical field of heating equipment, in particular to a photoelectric complementary multi-stage heating flash compression type and air source heat pump heating system. Background technique [0002] Heating in the severe cold period in northern my country mainly relies on fossil energy such as coal and natural gas. During the mining and use of these resources, a large amount of pollutants and greenhouse gases will be generated, leading to environmental degradation. Under the background of the interaction of energy shortage, environmental degradation and climate problems, it is an important problem to be solved urgently to establish an energy-saving, high-efficiency, low-carbon and environmentally friendly heating technology route as a substitute or supplement to the traditional central heating system. [0003] As the original waste heat of the city, domestic sewage has a series of advantages such as easy collection, high lo...

AI Technical Summary

Problems solved by technology

However, air source heat pumps in severe cold areas are affected by the low outdoor ambient temperature, which is prone to problems such as evaporator frosting. At the same time, the temperature difference between high and low temperature heat sources will reduce the heating performance coefficient of heat pumps; while the residual heat of sewage is limited by the flow of domestic sewage in living areas. Extractable residual heat is limited

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