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A coupled cycle system and control method for solar thermal power generation

A technology of solar thermal power generation and circulation system, applied in the field of thermal circulation system, can solve problems such as difficulty in meeting electric power demand, reduction of total output electric power of solar thermal power generation, etc. The effect of large thermal efficiency and efficiency

Active Publication Date: 2019-10-15
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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  • A coupled cycle system and control method for solar thermal power generation
  • A coupled cycle system and control method for solar thermal power generation

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Embodiment Construction

[0016] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments:

[0017] (1) Operation mode of coupled circulation 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 into one through a generator 8 and an evaporator 14 The complete system also includes a control system for the inlet temperature of the main compressor.

[0019] Supercritical carbon dioxide Brayton cycle subsystem: CO 2 The working fluid absorbs heat from the high-temperature heat source heat exchanger 1 and then enters the circulating turbine 2. The CO at the outlet of the circulating turbine 2 2 The working fluid enters the heat release side of the high temperature regenerator 3 and the low temperature regenerator 4 in turn, a...

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Abstract

A coupled cycle system and control method for solar thermal power generation, the system includes a supercritical carbon dioxide Brayton cycle subsystem and a lithium bromide absorption refrigeration cycle subsystem coupled through a generator and an evaporator, and a control of the inlet temperature of the main compressor Control system; the present invention also discloses the control method of the system; by supercritical CO 2 Part of the waste heat released by the Brayton cycle into the cooler is converted into cold energy through the lithium bromide absorption refrigeration cycle to reduce the inlet temperature of the main compressor, thereby reducing the irreversible loss of the total useful energy of the coupled cycle system and improving the cycle efficiency. The thermal efficiency and efficiency of the system; and through the control of the inlet temperature of the main compressor, the efficient and stable operation of the coupled power generation system under different air temperature conditions is guaranteed.

Description

Technical field [0001] The invention relates to a thermal cycle system, in particular to a coupled cycle system and a 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 very promising form of energy utilization because of its low-carbon, environmentally friendly and inexhaustible advantages. Among them, solar thermal power generation is regarded as a kind of energy conversion technology with great potential due to its advantages of power generation continuity and stability, energy saving and consumption reduction, and investment saving, and will occupy the future energy industry in my country and the world. Important position. On the other hand, supercritical carbon dioxide (S-CO 2 ) The Brayton cycle has high thermal efficiency at the initial turbine temperature of about 450-650℃, and has the advantages of compact structure and small size, so it is regarded as a p...

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Application Information

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Patent Type & Authority Patents(China)
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