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A co-based 2 Working fluid cogeneration system

A technology for combined cooling and power generation and power generation systems, used in refrigerators, refrigeration and liquefaction, machines/engines, etc., can solve problems such as high cost, difficult control, complex structure, etc., to improve efficiency, reduce system costs, and make the system compact. Effect

Active Publication Date: 2021-01-26
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above combined cooling and power system, the heat exchange between the two cycles is realized either through a heat exchanger, or through an injector coupling, so the CO 2 Most of the combined supply systems have problems such as complex structure, high cost, and difficulty in control

Method used

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  • A co-based <sub>2</sub> Working fluid cogeneration system
  • A co-based <sub>2</sub> Working fluid cogeneration system
  • A co-based <sub>2</sub> Working fluid cogeneration system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The combined cooling and power system, S-CO 2 at S-CO 2 After the heater 1 is heated to a state of high temperature and high pressure by the heat source, it enters the S-CO 2 The expander 2 works and drives the first generator 3 to generate electricity, and then the S-CO 2 High temperature and low pressure S-CO from expander 2 2 The S-CO that enters the inlet of the high-temperature end of the high-temperature regenerator 4 and exits from the low-temperature end of the high-temperature regenerator 4 2 S-CO with compressor 11 outlet of refrigeration system 2 S-CO mixed and flowing into the inlet of the high temperature end of the low temperature regenerator 5, followed by the outlet of the low temperature end of the low temperature regenerator 5 2 Enter S-CO 2 The cooler 6 is cooled by the cold source to the near-critical region (~>31°C), in the S-CO 2 Cooler 6 outlet is divided into two parts, one part S-CO 2 Enter the power generation system, another part of S-C...

Embodiment 2

[0029] The combined cooling and power system, S-CO 2 at S-CO 2 After the heater 1 is heated to a state of high temperature and high pressure by the heat source, it enters the S-CO 2 The expander 2 works and drives the first generator 3 to generate electricity, and then the S-CO 2 High temperature and low pressure S-CO from expander 2 2 The S-CO that enters the inlet of the high-temperature end of the high-temperature regenerator 4 and exits from the low-temperature end of the high-temperature regenerator 4 2 S-CO with compressor 11 outlet of refrigeration system 2 S-CO mixed and flowing into the inlet of the high temperature end of the low temperature regenerator 5, followed by the outlet of the low temperature end of the low temperature regenerator 5 2 Enter S-CO 2 The cooler 6 is cooled by the cold source to the near-critical region (~>31°C), in the S-CO 2 Cooler 6 outlet is divided into two parts, one part S-CO 2 Enter the power generation system, another part of S-C...

Embodiment 3

[0034] The combined cooling and power system, S-CO 2 at S-CO 2 After the heater 1 is heated to a state of high temperature and high pressure by the heat source, it enters the S-CO 2 The expander 2 works and drives the first generator 3 to generate electricity, and then the S-CO 2 S-CO from expander 2 2 Enter S-CO 2 After the reheater 15 is reheated by the heat source, it enters the second stage S-CO 2 The expander 16, the expander 16 works, and drives the second generator 17 to generate electricity, the second stage S-CO 2 S-CO at the outlet of expander 16 2 The S-CO that flows into the inlet of the high-temperature end of the high-temperature regenerator 4 and exits from the low-temperature end of the high-temperature regenerator 4 2 S-CO with compressor 11 outlet of refrigeration system 2 S-CO mixed and flowing into the inlet of the high temperature end of the low temperature regenerator 5, followed by the outlet of the low temperature end of the low temperature regen...

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Abstract

The invention discloses a CO based 2 Working fluid cogeneration system, including supercritical CO 2 Brayton cycle power generation system, transcritical CO 2 Cyclic refrigeration system. The CO of supercritical Brayton cycle and transcritical refrigeration cycle in the present invention 2 At the inlet of the high temperature end of the low temperature regenerator, it is mixed with high pressure and low temperature CO 2 heat exchange, and the CO 2 Cooled in the cooler to the near critical area, divided into two parts, one part of CO 2 The compressor entering the supercritical Brayton cycle system boosts the pressure, and absorbs heat in the regenerator and heater to form high-temperature and high-pressure CO 2 , and generate power in the expander; another part of CO 2 The cooler flowing into the transcritical refrigeration cycle system continues to cool down to a liquid state below the critical temperature, and the temperature and pressure are lowered by the expansion valve, and the evaporator is evaporated and refrigerated. The present invention uses a low temperature regenerator and CO 2 The cooler will be supercritical CO 2 Cyclic and transcritical CO 2 Cyclic coupling realizes heat recovery and cooling and heat removal of power generation system and refrigeration system.

Description

technical field [0001] The invention belongs to the technical field of power engineering and engineering thermophysics, and specifically relates to a CO-based 2 Cooling and power cogeneration system with working fluid. Background technique [0002] With the diversification of energy demand, combined cooling and power system has received extensive attention and research to meet the needs of power generation and cooling at the same time. [0003] CO 2 As a natural working fluid, due to the critical point (T c =30.98℃, P c =7.38MPa) is low, easy to reach the supercritical state, and has been widely used in the efficient conversion of energy. In the field of power generation, scholars at home and abroad have launched supercritical CO 2 Brayton cycle and transcritical CO 2 In the research of Rankine cycle power generation technology, some countries have launched the manufacture and testing of prototypes. In refrigeration, transcritical CO 2 The refrigeration cycle system ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B9/00F01K7/32F01K25/10
CPCF01K7/32F01K25/103F25B9/008F25B2309/061
Inventor 苏文杨燕周乃君
Owner CENT SOUTH UNIV
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