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Experimental performance of a two-stage (50×) parabolic trough collector tested to 650 °C using a suspended particulate heat transfer fluid
- Widyolar, Bennett, Jiang, Lun, Ferry, Jonathan, Winston, Roland, Cygan, David, Abbasi, Hamid
- Applied energy 2019 v.240 pp. 436-445
- heat transfer, prototypes, solar collectors, temperature, California
- 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× concentration on the thermal absorber. An experimental prototype fabricated and installed at the University of California, Merced was tested on-sun up to 650 °C using a suspended particulate heat transfer fluid (HTF). The prototype collector demonstrated 63% optical efficiency and 40% thermal efficiency at 650 °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.