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Solar power generation system

A power generation system, solar technology, applied in the energy field, can solve the problems of energy quality degradation, lack of thermochemical energy storage technology, and power consumption

Pending Publication Date: 2020-10-27
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of energy storage by increasing the temperature of molten salt or solid particles belongs to sensible heat energy storage, and the energy storage density is low. Most of the heat transfer medium and working medium adopt indirect heat exchange, the heat exchange efficiency is low, and the heat exchange process is inevitable. The temperature drops, the energy quality decreases, and the transportation of molten salt and solid particles requires work. At the same time, the heat loss of high-temperature heat absorbers is large, which affects the overall efficiency. In addition, there is a lack of thermochemical energy storage technology combined with solar supercritical carbon dioxide thermal power plants. The system cost is high, therefore, the development of a thermochemical energy storage technology with high heat storage density, high operating temperature, low cost, high efficiency, and environmental friendliness is very important for solar supercritical carbon dioxide Brayton cycle thermal power plants

Method used

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Embodiment 1

[0052] This embodiment provides a solar power generation system, which has a medium flow path 15 for accommodating the circulation of the medium in the solar power generation system. The medium flow path 15 includes a first loop 151 and a second loop 152 .

[0053] In the present invention, the first loop 151 is used as the heat transfer medium flow path of the heat transfer cycle of the solar power generation system, and the second loop 152 is used as the working medium flow path of the power cycle of the solar power generation system.

[0054] Correspondingly, the medium serves as the heat transfer medium in the first circuit 151 , and the medium serves as the working medium in the second circuit 152 .

[0055] The first circuit 151 communicates with the solar heat absorber 1 and the first heat storage / radiation unit 2,

[0056] The first heat storage / radiation unit 2 is arranged downstream of the flow path of the solar heat absorber 1, and utilizes an endothermic reaction o...

Embodiment 2

[0109] The second embodiment of the present invention also relates to a solar power generation system based on MgNa2(CO3)2 / MgO-Na2CO3 energy storage, which is different from the first embodiment in that the arrangement of the Brayton cycle is different.

[0110] Preferably, the Brayton cycle system 17 is any one of a simple Brayton cycle system, a recompressed Brayton cycle system, a recompressed partially cooled Brayton cycle system or a recompressed intercooled Brayton cycle system.

[0111] The selection and coordination of different Brayton cycle systems 17 improve the overall operating efficiency. For example, the difference between the recompression partial cooling Brayton cycle system and the recompression intercooling Brayton unit and the recompression Brayton cycle system is that, The overall efficiency is improved and it is suitable for systems with larger pressure ratios.

[0112] figure 2 Included in the system shown is a recompression Brayton cycle system. The d...

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Abstract

The invention discloses a solar power generation system. The solar power generation system is provided with a medium flowing path for accommodating a medium to circulate in the solar power generationsystem, the medium flow path comprises a first circuit and a second circuit, a pressure adjusting unit communicates with the first circuit and the second circuit, the pressure adjusting unit can stabilize the air pressure in the first circuit below a specified threshold value by conveying the medium in the first circuit to the second circuit. According to the solar power generation system, the high-density energy storage and high-efficiency heat exchange can be achieved, the partial pressure of carbon dioxide in the process of heat storage and release can be adjusted through the energy storagemode of a solar chemical heat pump, so as to upgrade the medium-temperature energy storage to the high-temperature energy storage with high application value, the overall efficiency is improved, andthe system cost is lowered.

Description

technical field [0001] The invention relates to the field of energy technology, in particular to a solar power generation system. Background technique [0002] With the massive consumption of traditional fossil energy and the increasingly prominent environmental problems, the development of renewable energy has received widespread attention. As the clean energy with the most abundant reserves, solar energy will be the focus of the development of renewable energy in the future. [0003] Solar power generation technology is mainly divided into two categories: photovoltaic power generation and photothermal power generation. Compared with photovoltaic power generation, solar photothermal power generation uses cheap energy storage technology, which has the advantages of stable and continuous power output, and can be used as basic charge power supply , and can be used as a peak-shaving power supply, with great development potential. [0004] Solar thermal power generation technol...

Claims

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Application Information

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IPC IPC(8): F03G6/06F01K25/10
CPCF01K25/103F03G6/067Y02E10/46
Inventor 肖刚庞华杨天锋倪明江岑可法
Owner ZHEJIANG UNIV
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