Solar moist air circulating electricity-water cogeneration system

Abstract

The invention discloses a solar moist air circulating electricity-water cogeneration system which comprises an immersion bubbling distiller, a fed seawater pipeline, a condenser, a low-pressure compressor, an intercooler, a high-pressure compressor, a heat regenerator, a tower type solar superheater, a high-pressure moist air turbine, a tower type solar reheater, a low-pressure moist air turbine and an electric generator. Original seawater is subjected to two-level preheating through the intercooler and the condenser and then is conveyed into the immersion bubbling distiller; external air is subjected to two-level compressor and then enters the heat regenerator to be warmed, and then the external air is sprayed into the seawater to be heated and mixed; formed moist and hot air is heated by the tower type solar superheater and then sent to the moist air turbine for acting and power generation; waste heat of exhausted steam is discharged through the heat regenerator and the condenser, and water steam in moist air is condensed into fresh water which is then output. The Brayton cycle and the immersion bubbling distilling technology are coupled, and the solar moist air circulating electricity-water cogeneration system has the characteristics of being good in distilling performance, high in overall power generating efficiency, high in circulating heat efficiency and wide in application range, and can be widely applied to the field of solar electricity-water cogeneration.

Description

technical field [0001] The invention belongs to the technical field of solar heat utilization, and in particular relates to a solar energy humid air cycle power-water cogeneration system. Background technique [0002] Solar energy is an inexhaustible clean and renewable energy source. Under the condition of relatively tight conventional energy sources worldwide, solar energy has become an important part of energy used by human beings and has been continuously developed. Solar energy can be used to generate heat and electricity, making it ideal as a driving source for cogeneration systems that produce electricity and desalinate water. At present, the power-water cogeneration model has been widely promoted and applied all over the world, which means that the power-water cogeneration mode using solar energy will be the inevitable direction of major development in the field of solar energy utilization technology in the future. At present, the Chinese Academy of Sciences and oth...

AI Technical Summary

Problems solved by technology

The Rankine cycle can use low-boiling-point steam or water vapor as the working medium. The steam Rankine cycle is suitable for medium-temperature solar thermal power generation systems, but its application is still relatively limited in islands and remote areas that lack fresh water resources. Part of the water production will be used to solve the power station's own water use problems in the implementation of the power-water cogeneration model

The thermal efficiency of the Stirling cycle is relatively high, and it is more suitable for high-temperature solar thermal power generation systems. However, due to its low power, high manufacturing cost, and poor reliability, it still does not have market competitiveness.

The Brayton cycle can heat compressed air to a high temperature level, which is suitable for high-temperature solar thermal power generation systems. The combustion chamber is replaced by a solar air boiler, and the gas turbine is replaced by an air turbine. As an emerging solar thermal power generation technology, it has great potential in the future. However, due to the poor heat transfer performance and small working ability of the air, the entire power generation system will be bulky and costly

[0004] The current solar power-water cogeneration mode is the coupling between the solar Rankine cycle thermal power generation system and the distillation seawater desalination technology (including low-temperature multi-effect, multi-stage flash evaporation, and pressure steam distillation), using low-pressure steam extraction or steam turbine exhaust as the Drive the heat source for thermal seawater desalination. The above method needs to consume a large amount of saturated steam, and there is inevitably the problem that the heat exchange surface is easy to scale and corrode.

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