Tower type solar energy heat collection and gas-steam combined cycle integration complementary system
A tower solar and combined cycle technology, applied in the field of complementary systems, can solve the problems of low thermal efficiency and high construction cost of independent solar power stations, and achieve the effect of improving solar energy utilization and efficient operation.
Inactive Publication Date: 2018-09-28
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology
Due to the limitations of the characteristics of solar energy and the temperature of the working medium, the thermal efficiency of independent solar power plants is low, heat storage units need to be added, and the construction cost is high. Therefore, the coupling and integration of solar energy and conventional fossil fuel power plants has become a current research hotspot.
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[0028] exist figure 1 Among them, the GTCC reference system in the dotted box below is the gas-steam combined cycle reference system, which is a conventional gas power generation system. After the air is compressed by the compressor 5, it is combusted with natural gas in the combustion chamber 6, and the generated gas enters the gas turbine 7 to perform work, driving The first coaxial generator b1 rotates to generate electricity; at the same time, part of the compressed air is extracted to cool the turbine blades; the high-temperature flue gas (609°C) after doing work enters the waste heat boiler and flows through each heating surface (HPS and RH, HPB, IPS, HPE2) , LPS, IPB, IPE, HPE1, LPB, LPE) to heat the high, medium and low pressure three-stage feed water (steam); Finally, the superheated steam heated to the specified temperature by the three-stage feed water is introduced into the steam turbine to do work, the second coaxial generator b2 rotates to generate electricity, a...
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The invention discloses a tower type solar energy heat collection and gas-steam combined cycle integration complementary system and belongs to the technical field of solar energy and gas combined thermal power generation. The complementary system is formed by connecting a tower type solar energy heat collection plant and a gas-steam combined cycle standard system through two heat exchangers. The tower type solar energy heat collection plant is adopted, fused salt is a heat conduction medium, and the fused salt exchanges heat with a medium in the combined cycle system. When the direct radiationintensity of the sun is high, compressed air is heated, the burning efficiency is improved, then the fused salt which still has high temperature after heat exchange is introduced into a waste heat furnace to heat high-pressure supplied water to be evaporated, and the function of replacing part of heat loads of a high-pressure evaporator is achieved; and when the direct radiation intensity of thesun is low, only the high-pressure supplied water is heated. Solar energy at the stage of low-energy density is effectively used, and the influence of the solar radiation intensity fluctuating along with time on the system is reduced. The solar energy utilization rate and the system stability are improved, and the consumption amount of natural gas is reduced.
Description
technical field [0001] The invention belongs to the technical field of solar energy and gas combined thermal power generation, and in particular relates to a complementary system integrating tower solar heat collection and gas-steam combined cycle. Background technique [0002] For a long time, fossil energy has occupied a major part of the world's energy utilization structure. However, with the excessive consumption of fossil energy and the increasingly prominent problems of environmental pollution, solar energy, as the renewable energy with the largest reserves, its large-scale and efficient utilization has become an inevitable requirement for adjusting the world's energy utilization structure and achieving sustainable development. Due to the limitations of the characteristics of solar energy and the temperature of the working medium, the thermal efficiency of independent solar power plants is low, heat storage units need to be added, and the construction cost is high. The...
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IPC IPC(8): F03G6/06F01D15/10F02C6/18F24S10/30
CPCF01D15/10F02C6/18F03G6/064F03G6/065Y02E10/46
Inventor 段立强谢坤孙婧蔡海帆
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)