Solar air heat absorber measurement and control system and performance and temperature prediction and protection method

Abstract

The invention discloses a solar air heat absorber measurement and control system and a performance and temperature prediction and protection method. The system comprises a frequency modulation motor, a thermocouple, a pressure sensor, a direct solar radiation and wind speed meter, an air temperature sensor, an analog input module, an analog output module, a remote interface module, a remote communication interface module, an industrial personal computer and a warner. The efficiency is obtained by measuring the input radiation and effective absorption of the sun and dividing the effective absorbed heat by the total input radiation energy; the pressure sensor is used to measure resistance; volumetric heat transfer coefficient is obtained by measuring the solid matrix temperature of the front and back surfaces of the heat absorber and the air temperatures before or after air passes through the heat absorber and performing iterative computation through the computational heat transfer method. The heat absorber is protected by setting limit values of the surface temperature and temperature gradient of the heat absorber and the temperature gradient in the air stream direction.

Description

technical field [0001] The invention is directed to a high-temperature air heat absorber for solar tower thermal power generation. The heat absorber absorbs the radiant energy projected by the mirror field through a porous medium and heats the air to a high temperature. Heater measurement and control system, performance test, temperature dynamic prediction and protection method, the invention belongs to the field of solar energy utilization, thermal energy power and automatic control. Background technique [0002] Effective use of solar energy resources will help alleviate my country's energy problems and reduce CO 2 It will be of great and far-reaching significance to reduce emissions, protect the ecological environment, and ensure the continuous and stable supply of energy in the process of economic development. At present, solar power generation mainly includes photovoltaic power generation and photothermal power generation. [0003] In solar thermal power generation te...

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Problems solved by technology

[0006] Technical problem: There is no measurement standard for the performance of solar tower-type high-temperature ceramic air heat absorbers, and the heat-absorbing material of solar tower-type high-temperature air heat absorbers made of silicon carbide is unstable due to the instability of solar energy concentration energy flux density. Thermal stress damage, poor air flow stability, and thus poor reliability and durability of the system under large capacity

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