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Coupling circulation system used for solar thermal power generation and control method

A technology of solar thermal power generation and circulation system, which is applied in the field of thermal cycle system, can solve the problems of the total output power reduction of solar thermal power generation and the difficulty in meeting the power demand, and achieve stable and efficient inlet temperature control, good variable working condition characteristics, and net The effect of improving the output power

Active Publication Date: 2017-08-25
XI AN JIAOTONG UNIV
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Problems solved by technology

Therefore, the use of air cooling will have a significant negative impact on cycle efficiency, especially in summer when the temperature is high, and the drop in cycle efficiency will be more obvious. Considering that summer is a season with abundant solar energy resources and peak power demand, the cycle efficiency will decrease. Significant reduction will have a particularly severe cut to the total output power of solar thermal power generation, and the power demand will also be difficult to meet

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  • Coupling circulation system used for solar thermal power generation and control method
  • Coupling circulation system used for solar thermal power generation and control method

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Embodiment Construction

[0016] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0017] (1) Operation mode of coupled circulatory system

[0018] The present invention proposes a coupled cycle system for solar thermal power generation. The coupled cycle system can be divided into two sub-systems, a supercritical carbon dioxide Brayton cycle and a lithium bromide absorption refrigeration cycle, and is coupled with an evaporator 14 through a generator 8 For a complete system, it also includes a control system for the inlet temperature of the main compressor.

[0019] In the supercritical carbon dioxide Brayton cycle subsystem: CO 2 The working fluid enters the circulation turbine 2 after absorbing heat from the high-temperature heat source heat exchanger 1, and the CO at the outlet of the circulation turbine 2 2 The working medium enters the heat release side of the high temperature regenerator 3 and the low temperature rege...

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Abstract

The invention discloses a coupling circulation system used for solar thermal power generation and a control method. The system comprises a supercritical carbon dioxide Brayton circulation subsystem and a lithium bromide absorption refrigeration circulation subsystem which are coupled with an evaporator through a generator, and further comprises a control system for the temperature of an inlet of a main compressor. The invention further discloses a control method of the system, part of heat energy in waste heat originally entering a cooler to be released in supercritical CO2 Brayton circulation is converted into cooling capacity energy through lithium bromide absorption refrigeration circulation to be used, so that the temperature of the inlet of the main compressor is reduced, irreversible losses of total useful energy of the coupling circulation system are reduced, and the heat efficiency and energy efficiency of the circulation system are improved; and it is ensured that the coupling power generation system can run efficiently and stably under different air temperature conditions by controlling the temperature of the inlet of the main compressor.

Description

technical field [0001] The invention relates to a thermodynamic cycle system, in particular to a coupled cycle system and control method for solar thermal power generation. Background technique [0002] As a new type of energy conversion technology, solar power generation is regarded as a promising form of energy utilization due to its advantages of low carbon, environmental protection and inexhaustible use. Among them, solar thermal power generation is regarded as a very potential energy conversion technology due to its advantages of power generation continuity and stability, energy saving and investment saving, and will occupy an important role in the development of the future energy industry in my country and the world. Important position. On the other hand, supercritical carbon dioxide (S‐CO 2 ) Brayton cycle has high thermal efficiency at the initial turbine temperature of about 450‐650 °C, and has the advantages of compact structure and small volume, so it is regarded...

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Application Information

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IPC IPC(8): F25B15/06F25B27/02F25B41/06F01K25/10F01K11/02F25B41/30
CPCF01K11/02F01K25/103F25B15/06F25B27/02F25B41/30Y02B30/625Y02A30/274Y02A40/963
Inventor 马岳庚张鑫杨晶莹刘明刘继平
Owner XI AN JIAOTONG UNIV
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