A tower solar power generation system with heat storage and heat exchange integration

Abstract

The invention relates to a heat accumulation and exchange integrated tower-type solar power generation system which comprises a heliostat field, a saturated water heat absorber, a water heat accumulator, a superheated heat absorber, a heat accumulation / heat exchange device, a steam turbine, a generator set, a condenser, a condensate pump, a deaerator, a water feed pump and a plurality of block valves. The first block valve is arranged between the saturated water heat absorber and the water heat accumulator, the second block valve is arranged between the water heat accumulator and the superheated heat absorber, the third block valve is arranged between the superheated heat absorber and the heat accumulation / heat exchange device, and the fourth block valve is arranged between the water heat accumulator and the heat accumulation / heat exchange device. Under the state that solar rays are sufficient, the first block valve, the second block valve and the third block valve are opened, the fourth block valve is closed, superheated steam is buffered through the heat accumulation / heat exchange device, and heat is accumulated through the heat accumulation / heat exchange device. Under the state that the solar rays are insufficient, the first block valve, the second block valve and the third block valve are closed, the fourth block valve is opened, and heat exchange is carried out on saturated steam through the heat accumulation / heat exchange device to form the superheated steam.

Description

technical field [0001] The invention relates to the technical field of solar energy, in particular to a tower-type solar power generation system integrating heat storage and heat exchange. Background technique [0002] Solar concentrating power generation technology has been developed for more than 30 years. It is different from solar photovoltaic power generation and direct photothermal power generation using Stirling generators. It is an important research direction for solar energy utilization. Solving problems such as the fossil energy crisis and air pollution has far-reaching significance. There are many technical directions for solar high-temperature thermal power generation: according to different focusing methods, it can be divided into dish type, trough type, tower type, etc.; the working medium used includes water (steam), molten salt, air, heat transfer oil, liquid metal and other heat transfer media. [0003] The tower-type focused solar thermal power generatio...

AI Technical Summary

Problems solved by technology

However, the water working medium has almost no heat storage capacity. When the solar radiation intensity drops, the clouds will block the heliostat field for a short time, resulting in the failure of the heat absorption system to generate qualified steam to drive the steam turbine to continue to work.

The current conventional method is to use fossil fuel boilers to heat and generate superheated steam. The disadvantage is that it cannot respond in time, and it does not meet the original intention of reducing carbon emissions and reducing environmental pollution.

However, if ignored, the steam turbine will start and stop frequently during the day, which not only greatly shortens the service life of the steam turbine, but also affects the power generation.

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