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Supercritical carbon dioxide Brayton cycle system

A carbon dioxide and circulation system technology, applied in the direction of steam engine devices, machines/engines, mechanical equipment, etc., can solve the problems of limited heat exchange and difficulty in meeting the heat recovery demand of the Brayton cycle system, and achieve overall changes with little impact and increased The method of heat recovery adjustment and the effect of meeting the demand of heat recovery

Pending Publication Date: 2021-11-02
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of processing technology, the heat transfer capacity of a single regenerator is limited, and it is difficult to meet the heat recovery demand of a large-scale Brayton cycle system.

Method used

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  • Supercritical carbon dioxide Brayton cycle system
  • Supercritical carbon dioxide Brayton cycle system
  • Supercritical carbon dioxide Brayton cycle system

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Effect test

Embodiment approach 1

[0045] The first embodiment of the present invention provides a supercritical carbon dioxide Brayton cycle system, see figure 1 As shown, it includes heat source heat exchanger 1 , turbine 2 , cooler 3 , compressor 4 , generator 5 and regenerator 6 . Wherein, the heat source heat exchanger 1 , the turbine 2 , the cooler 3 and the compressor 4 are sequentially and cyclically connected, and the generator 5 is connected to the output end of the turbine 2 . The inlet and outlet of the hot side of the regenerator 6 are connected with the turbine 2 and the cooler 3 , and the inlet and outlet of the cold side are connected with the compressor 4 and the heat source heat exchanger 1 .

[0046] The supercritical carbon dioxide Brayton cycle system described in this embodiment uses supercritical carbon dioxide (hereinafter referred to as S-CO 2 ) is a closed thermodynamic cycle system of heat exchange and work medium. S-CO 2 Heat is absorbed at the heat source heat exchanger 1, and be...

Embodiment approach 2

[0087] The second embodiment of the present invention provides a supercritical carbon dioxide Brayton cycle system. The second embodiment is a further improvement on the first embodiment. Parts not specifically described include reference signs and text descriptions, which are the same as those in the first embodiment. An embodiment is the same, and will not be repeated here.

[0088] Compared with the first embodiment, the main improvement of the second embodiment is that in the second embodiment of the present invention, the basic combination of multiple regenerators 6 in the first embodiment is a module, and constitutes One or more regenerators 6 are connected to the modules. Connection modules can be as figure 1 A plurality of regenerators 6 connected in series form a series module 7, such as figure 2 A plurality of regenerators 6 connected in parallel form a parallel module 8, such as image 3 and Figure 4 A plurality of regenerators 6 in the middle series are respe...

Embodiment approach 3

[0097] The third embodiment of the present invention provides a supercritical carbon dioxide Brayton cycle system, the third embodiment is a further improvement on the first or second embodiment, and the parts not specifically described include reference signs and text descriptions, All are the same as those in the first or second embodiment, and will not be repeated here.

[0098] The main improvement of the third embodiment relative to the first or second embodiment is that in the third embodiment of the present invention, a plurality of regenerators 6 are provided to utilize other Possible ways in which heat source systems participate in regulation. combine Figure 11 It can be seen that the supercritical carbon dioxide Brayton cycle system also includes other heat source systems, and other heat source systems are used to participate in the variable load regulation of the Brayton cycle system. Preferably, the heat source system in this embodiment is the thermochemical rea...

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Abstract

The invention relates to the technical field of heat exchange equipment, and discloses a supercritical carbon dioxide Brayton cycle system. The supercritical carbon dioxide Brayton cycle system comprises a generator, a heat source heat exchanger, a turbine, a cooler and a compressor, the heat source heat exchanger, the turbine, the cooler and the compressor are sequentially and circularly connected, the generator is connected with the output end of the turbine, and a plurality of heat regenerators are further arranged between the turbine and the cooler. The number of the heat regenerators is not less than three, a hot side inlet and a hot side outlet of each heat regenerator are connected with the turbine and the cooler, and a cold side inlet and a cold side outlet of each heat regenerator are connected with the compressor and the heat source heat exchanger. Compared with the structure of an existing circulating system, the multiple heat regenerators can form multiple connection modes, so that the heat regeneration requirements of large Brayton cycle systems of different magnitudes can be met, a system regulation and control strategy based on heat regenerator equipment can be conveniently formed, the regulation and control modes of a closed Brayton cycle system are increased. The flexibility of the supercritical carbon dioxide Brayton cycle system is improved.

Description

technical field [0001] The invention relates to the technical field of heat exchange equipment, in particular to a supercritical carbon dioxide Brayton cycle system. Background technique [0002] Supercritical carbon dioxide (S-CO 2 ) power cycle has better characteristics in medium and high temperature heat source systems, and has received widespread attention in recent years. Its application research has been extended to many fields such as fossil fuel power generation, ship propulsion systems, concentrated solar energy, fuel cells, and industrial waste heat recovery. Compared with the existing Rankine cycle for steam power generation, the supercritical carbon dioxide Brayton cycle has the following advantages: (1) under medium and high temperature conditions, the cycle efficiency is higher; (2) the density of carbon dioxide near the critical point is high, and the required compression The power is small, which can improve the efficiency; (3) The size of the turbine equip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K13/00F01K13/02F01K25/10F01K7/32
CPCF01K13/006F01K13/02F01K25/103F01K7/32
Inventor 肖刚纪宇轩王征倪明江岑可法骆仲泱
Owner ZHEJIANG UNIV
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