Experimental Study on Thermal Performance of Solar Cylindrical Rods Receiver

Abstract

Due to the high - density solar concentrating energy flow and the high working temperature of the 800℃ receiver for supercritical carbon dioxide(sCO2) power generation, reliability is the key of the equipment. As a solar receiver, the cylindrical rods receiver can adapt to the uneven high-density light energy flow and has high reliability at high temperatures. In this paper, a cylindrical rods receiver prototype consisting of several cylindrical rods was designed and fabricated, and its thermal performance was tested on a solar furnace in Beijing Yanqing Concentrating Solar Power(CSP) plant. The distribution of concentrating energy flux on the endothermic surface and the temperature of the rods at different positions were measured. Then the surface morphology of the endothermic cylindrical rod was observed with a stereomicroscope, and the endothermic performance of the cylindrical rod was analyzed. When the average DNI is 745W/m2, the total heat absorption of four cylindrical rods receiver is 582.39 kJ, and the average heat absorption rate is 2.91kW. This study has certain guiding significance for the establishment of the heat absorption model, material selection, and control strategy of the cylindrical rods receiver in the CSP system.

Keywords: Supercritical carbon dioxide(sCO2), Concentrating Solar Power(CSP), Solar high-temperature receiver, Cylindrical rods receiver