Compound system of photovoltaic solar heat pump

Abstract

The invention relates to a compound system of a photovoltaic solar heat pump. The system comprises a solar heat pump circulation loop, a solar power generation branch, an assisting working medium branch and a control device, wherein the solar heat pump circulation loop is used for receiving solar energy and converting the solar energy to heat energy so as to drive circulation working media and a buried natural gas pipe to be subjected to heat exchange; the solar power generation branch is connected with the solar heat pump circulation loop, and used for converting solar energy into electric energy and feeding the electric energy back to the solar heat pump circulation loop; the assisting working medium branch is connected with the solar heat pump circulation loop and used for assisting the solar heat pump circulation loop in heat exchange at different temperatures in different seasons in different operating modes; the control device comprises a temperature detector, a controller and stop valves, and the stop valves are arranged on the solar heat pump circulation loop, the solar power generation branch and the assisting working medium branch respectively; the controller is connected with the stop valves and the temperature detector. Compared with the prior art, the compound system of the photovoltaic solar heat pump has the advantages of preventing frost heaving, being good in effect, good in economical efficiency, capable of saving energy, environmentally friendly and high in power generation efficiency, relieving the heat island effect, being wide in application range and the like.

Description

technical field [0001] The invention relates to the field of natural gas pipeline transportation, in particular to a photovoltaic solar heat pump composite system. Background technique [0002] During the long-distance transportation of natural gas, high pressure is required to provide transportation power (for example, the second line of West-East Gas Pipeline is generally 8-12MPa), and when the natural gas reaches the distribution station, in order to meet the pressure of downstream users ( Generally, the demand is 1.5~4MPa), and the pressure needs to be adjusted at the distribution station. After the high-pressure natural gas is regulated by the pressure regulating valve, the pressure will drop, and the temperature will suddenly drop below the freezing point due to the Joule-Thomson effect. During the transportation of low-temperature natural gas, especially in winter, the soil around the buried natural gas pipeline (8) after pressure regulation will be frozen, and the p...

AI Technical Summary

Problems solved by technology

Solar heat pumps will release a large amount of heat to the high-temperature environment during the condensation stage of the working fluid. This part of the heat is used for indoor heating in winter, and is usually directly discharged to the atmosphere in summer, resulting in waste of heat energy.

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