Electricity-water coproduction method combining solar power generation and sea water desalination

Abstract

The invention discloses an electricity-water coproduction method combining solar power generation and sea water desalination, and the method is characterized in that a solar heat collection system is used for converting the solar radiation energy to the heat energy of a heating agent, and the heating agent respectively transfers the energy to the high-pressure vapor and the low-pressure vapor inside a vapor generator; partial energy of the high-pressure vapor is converted to the electric energy through a vapor power generation system; the low-pressure vapor injects partial vapor in a low-temperature multi-effect distillation desalination device and collectively enters the low-temperature multi-effect distillation desalination device to be used as driving heat source to produce the fresh water; and after exchanging the heat through the vapor generator, the heating agent is supercharged by a heating agent pump to enter a solar heat collection system so as to absorb the solar radiation energy. The residual heat after the solar power generation is further utilized for desalting the sea water, so that not only is the solar radiation heat high efficiently utilized, but also the temperature of the heating agent returned to the heat collection system is reduced, and the heat collection efficiency is improved. Meanwhile, the electricity-water coproduction is realized, and high technical benefit and economic benefit can be realized.

Description

technical field

[0001] The invention relates to an electricity-water cogeneration method combining solar power generation and seawater desalination, and belongs to the technical field of solar energy utilization. Background technique

[0002] Solar power generation in the prior art mainly adopts the following two forms:

[0003] 1. Trough-type line-focused solar power generation system: the current main obstacle of this system is that the temperature of the heat-collecting working medium is not high, and the thermal efficiency of the power subsystem is low; The heat collection efficiency of the subsystem is low. When the heat collection temperature of the system is higher than 400 °C, the vacuum degree of the solar collector is difficult to guarantee, the service life is rapidly reduced, and the heat collection efficiency is also dropped sharply. For example, when the direct solar radiation intensity is 800W / m 2 , when the temperature is 500°C, the heat collection efficie...

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