Solar and biogas combined heat pump system

Abstract

The invention discloses a solar and biogas combined heat pump system which comprises a biogas supply system, a heat pump working medium circulation system, a solar energy utilization system and a tail gas heat recovery purification system, wherein the biogas supply system comprises a biogas digester, a biogas storage tank and a heater; the heater is arranged in the biogas digester; the heat pump working medium circulation system comprises a compressor, a condensing coil pipe, a throttling valve, an intermediate heat exchanger, a biogas internal combustion engine, a water tank, an air source heat exchanger, a four-way reversing valve, a first three-way valve and a second three-way valve; the compressor is driven by the biogas internal combustion engine; the solar energy utilization system comprises a solar energy collector, a water pump, a third three-way valve and a fourth three-way valve; the tail gas heat recovery purification system comprises the heater and a tail gas purification device. According to the system, cooling in summer, heating in winter and the supply of hot water are combined by utilizing a biogas driving mode, and the biogas digester is heated by tail gas produced by the combustion of biogas to promote the fermentation of microorganisms, so that the yield of the biogas is ensured, and the reliable and continuous running of the system is ensured.

Description

technical field [0001] The invention relates to a combined heat pump system of solar energy and biogas. Background technique [0002] With the increasing shortage of energy, the state vigorously advocates the development of new energy and encourages the use of secondary energy. [0003] Rural resources are relatively rich, such as human and livestock manure and a large amount of straw are raw materials for biogas production, so a large amount of biogas can be produced. This "self-production and self-consumption" biogas production method can ensure the supply of biogas. [0004] Solar energy is a huge renewable and clean energy with the characteristics of inexhaustible, cheap, safe, clean and non-polluting. At present, more and more people pay attention to it, and the technology of solar energy utilization has been developed rapidly. [0005] However, solar energy is unstable, and the production of biogas is greatly restricted by temperature. Therefore, how to solve the inst...

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Problems solved by technology

[0005] However, solar energy is unstable, and the production of biogas is greatly restricted by temperature. Therefore, how to solve the instability of the sun, how to increase the temperature in the biogas digester, increase the production of biogas, ensure a reliable and continuous supply of biogas, and at the same time, how to provide users with more The required heat is the current problem

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