Study for the measurement of flux density on high power concentrator focal plane based on thermo-electric effect
The energy flux density distribution of high-power solar concentrators on focal plane is a key factor to evaluate its concentrating effect,and it plays a decisive role in design,installation and heat transfer of concentrating solar cells or thermal power receivers.The indirect measurement method based on thermo-electric effect was proposed by taking advantage of high temperature measurement of sheathed thermocouple.The heat transfer model of armored thermocouple was constructed by ANSYS software.The concentrating solar energy flux density was taken as the input to conduct steady heat transfer model,and the thermodynamic function between energy flux density distribution and output temperature was obtained.The energy flux density distribution on focal plane of high power concentrator could be measured by inverse thermodynamic function.The influence of wind speed and ambient temperature is analyzed.The simulation results show that the influence of wind speed is greater than that of ambient temperature.Fresnel lens was used to build the experimental system and the model is verified by experiments.The relative error between measured data and model is less than 5%when the flux density is higher than 600 kW/m2.The accuracy of the model is good.
solar energyarmored thermocouplesenergy flux densityhigh power concentrator
万方数据
维普
