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...

Examples

Embodiment

[0033] Such as figure 1 As shown, a photovoltaic solar heat pump composite system, the system includes:

[0034] Solar heat pump circulation loop: By receiving solar energy and converting it into heat energy, the circulating working fluid is driven to exchange heat with the buried natural gas pipeline 8;

[0035] Solar power generation branch: connected to the solar heat pump circulation loop, converting solar energy into electrical energy, and feeding back to the solar heat pump circulation loop;

[0036] Auxiliary working fluid branch: connected to the solar heat pump circulation loop, through the switching of different operating modes in different seasons, while assisting the solar heat pump circulation loop to perform heat exchange and effectively solve the frost heaving of the pipeline, it can realize cooling in summer and supply throughout the year Power output and other functions;

[0037] Control device: including a temperature detector, a controller, and cut-off val...

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...

Examples

Embodiment

[0033] Such as figure 1 As shown, a photovoltaic solar heat pump composite system, the system includes:

[0034] Solar heat pump circulation loop: By receiving solar energy and converting it into heat energy, the circulating working fluid is driven to exchange heat with the buried natural gas pipeline 8;

[0035] Solar power generation branch: connected to the solar heat pump circulation loop, converting solar energy into electrical energy, and feeding back to the solar heat pump circulation loop;

[0036] Auxiliary working fluid branch: connected to the solar heat pump circulation loop, through the switching of different operating modes in different seasons, while assisting the solar heat pump circulation loop to perform heat exchange and effectively solve the frost heaving of the pipeline, it can realize cooling in summer and supply throughout the year Power output and other functions;

[0037] Control device: including a temperature detector, a controller, and cut-off val...

Images