화학공학소재연구정보센터
Applied Energy, Vol.240, 436-445, 2019
Experimental performance of a two-stage (50 x) parabolic trough collector tested to 650 degrees C using a suspended particulate heat transfer fluid
A two-stage high-concentration collector has been developed which pairs a 45 half rim angle parabolic trough with a secondary compound parabolic concentrator to achieve 50 x concentration on the thermal absorber. An experimental prototype fabricated and installed at the University of California, Merced was tested on-sun up to 650 degrees C using a suspended particulate heat transfer fluid (HTF). The prototype collector demonstrated 63% optical efficiency and 40% thermal efficiency at 650 degrees C. This prototype demonstrates the feasibility of a two-stage linear trough collector at generating high flux and high absorber temperatures, and the ability of the particulate HTF to operate under these conditions.