Low-temperature working medium solar photo-thermal power generation system and solar photo-thermal power generation equipment

Abstract

The embodiment of the invention provides a low-temperature working medium solar photo-thermal power generation system and solar photo-thermal power generation equipment. According to an existing solarphoto-thermal power generation system with water and steam as power generation working media, the effective heat efficiency is only about 22%, about 80% of energy is released into ambient air througha cooling tower or an air cooling island, and huge waste of solar photo-thermal energy is caused. According to the system, CO2, liquid nitrogen or liquid air and other low-temperature power generation working media are adopted, heat energy of a solar photo-thermal mirror field heat collection system and a heat storage system can be fully absorbed, and high-efficiency power generation output can be conducted; the low-temperature power generation working medium solar photo-thermal power generation system is not provided with the cooling tower and the air cooling island, water resources do not need to be consumed, the effective heat efficiency of the low-temperature working medium solar photo-thermal power generation system can reach 75% or above, and electric energy output of three solar photo-thermal power generation systems and power stations is equivalently obtained by originally investing one solar photo-thermal power generation system; and clean and efficient solar energy is provided for human beings.

Description

technical field [0001] The invention relates to a solar thermal power generation system and solar thermal power generation equipment, belonging to the technical field of solar thermal power generation, and in particular to a supercritical solar thermal power generation technology using a low-temperature power generation working medium, liquid air or liquid nitrogen; It absorbs the high-temperature heat energy generated by the solar thermal collection system through liquid nitrogen and other low-temperature working fluids and realizes power generation and output, and is a very efficient solar thermal power generation system or solar thermal power generation equipment. Background technique [0002] Solar thermal power generation is one of the important projects in the utilization of solar energy. It gathers solar energy to heat the working fluid, and drives the steam turbine and generator to generate electricity. Solar cells are expensive and have low efficiency. Relatively sp...

AI Technical Summary

Problems solved by technology

Many technicians engaged in power generation learn and see that water is used as working medium for power generation. Most of them don’t think about using cryogenic liquid working medium. Some people think it is impossible to achieve, and some people think it is impossible. It is a "perpetual motion machine", so I will no longer study it in depth

[0009] In addition, the cylinder block of the steam turbine is stationary, and the rotor of the steam turbine rotates very fast. The high-speed rotating shaft and the stationary cylinder block must be strictly sealed, otherwise the ultra-high pressure gas input to the steam turbine will leak out along the shaft of the steam turbine. And the leak pressure is huge

Steam turbines need a shaft seal system, traditionally there are toothed seals, Braden seals, honeycomb seals, brush seals, soft tooth seals, and elastic tooth seals; although shaft seals are installed at the high-pressure inlet end, It is still unavoidable to avoid the leakage of steam through the shaft seal; the leakage of large steam turbines can reach more than 10 tons per hour

Especially low-temperature organic power generation working fluid (up to 100,000 yuan per ton), so the leakage cost of the shaft seal is also quite expensive

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