A system and method for measuring spectral emissivity of high temperature particle curtain

Abstract

The invention discloses a measuring system and method for the spectral emissivity of a high-temperature particle curtain. The system comprises a Fourier infrared spectrometer, a black body radiation source, a reflector, a rotating table, an optical path protection cover, a nitrogen bottle, a particle curtain heating furnace, A two-color infrared thermometer and a computer, the Fourier transform infrared spectrometer is connected to the first computer; the blackbody radiation source is controlled by a digital PID controller; the particle curtain heating furnace is controlled by a temperature controller; the particles are placed in the particle curtain for heating In the inner tank of the furnace, after the preheating is completed, it is released through the first high-temperature valve to form a particle curtain. A two-color infrared thermometer is used to measure the temperature of the free-fall particle curtain. The two-color infrared thermometer is connected to the second computer; The Liye infrared spectrometer measures the radiation signal of the particle curtain and the black body radiation signal at the same temperature to calculate the spectral emissivity of the particle curtain. The present invention can measure the spectral emissivity of particle curtains at different temperatures and thicknesses.

Description

technical field [0001] The invention relates to the technical field of tower concentrating solar thermal power generation, in particular to a measurement system for the spectral emissivity of a high-temperature particle curtain. Background technique [0002] The tower solar thermal power generation technology has the advantages of high concentration ratio and high power generation efficiency, and is one of the mainstream forms of large-scale solar thermal power generation. The main principle is to use heliostats to gather sunlight to heat the heat transfer medium in the collector, convert the solar energy into heat energy, and then generate electricity through heat exchange and power cycle, and convert the heat energy into electrical energy. In order to obtain higher heat collection temperature and improve power generation efficiency, solar collectors have been developed from liquid collectors using water and heat transfer oil as working fluids to molten salt collectors usin...

AI Technical Summary

Problems solved by technology

However, the state of the particles in the solid particle heat collector is a particle curtain with a certain gap between them. The high-temperature particles radiate each other and shield each other. The situation is complicated, and its radiation characteristics are very different from those in the accumulation state. Measurement of emissivity of high temperature particle curtains

Images