Solar and geothermal energy coupling power generation system device based on organic Rankine cycle

Abstract

The invention discloses a power generation system device based on an organic Rankine cycle coupled with solar energy and geothermal energy, which is composed of four subsystems: solar heat collection, geothermal water, organic Rankine cycle, and cooling water circulation. Among them: the solar heat collection subsystem is composed of solar heat collectors, temperature-increasing heat exchangers, and superheaters; the geothermal water subsystem is composed of pumping wells, temperature-increasing heat exchangers, evaporators, and preheaters. The organic refrigerant Rankine cycle subsystem is composed of superheater, scroll expander, condenser and so on. The cooling water circulation subsystem is composed of condenser, cooling tower and so on. The four subsystems are connected into a power generation system device through superheaters, preheaters, evaporators, etc. The device mainly enters different power generation modes through the logic switching of six valves. Through the above method, the present invention can effectively improve the operating efficiency and stability of the system; improve the utilization rate and thermal efficiency of medium and low temperature geothermal water, and belong to green power generation, so it has broad application prospects.

Description

technical field [0001] The invention belongs to the field of new energy, and in particular relates to a power generation system coupled with solar energy and geothermal energy. Background technique [0002] At present, energy conservation and emission reduction are the energy policies of many countries in the world, among which geothermal power generation technology with medium and low temperature heat sources is one of the research hotspots and the direction of industrialization promotion. Due to well-known reasons, the organic Rankine cycle is mostly adopted in the use of medium and low temperature geothermal energy for power generation. The organic Rankine cycle is a Rankine power cycle that uses organic matter instead of water as the working medium, and its characteristic is that it is very suitable for using low-grade heat energy to generate electricity. [0003] Both geothermal power generation and solar power generation are renewable clean energy power generation. Ge...

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Problems solved by technology

Utilizing the respective advantages of solar energy and geothermal energy can improve the shortcomings of a single power generation method, make up for the low efficiency of low-temperature geothermal power generation systems in spring, summer and autumn, and changeable operating conditions, so as to improve the comprehensive utilization of renewable energy. purpose of efficiency

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