This paper outlines a novel elevation linear Fresnel reflector (ELFR) and presents and validates theoretical models defining its thermal performance. To validate the models, a series of experiments were carried out for receiver temperatures in the range of 30–100 °C to measure the heat loss coefficient, gain in heat transfer fluid (HTF) temperature, thermal efficiency, and stagnation temperature. The heat loss coefficient was underestimated due to the model exclusion of collector end heat losses. The measured HTF temperature gains were found to have a good correlation to the model predictions—less than a 5% difference. In comparison to model predictions for the thermal efficiency and stagnation temperature, measured values had a difference of −39% to +31% and 22–38%, respectively. The difference between the measured and predicted values was attributed to the low-temperature region for the experiments. It was concluded that the theoretical models are suitable for examining linear Fresnel reflector (LFR) systems and can be adopted by other researchers.
Construction and Experimental Study of an Elevation Linear Fresnel Reflector
Contributed by the Solar Energy Division of ASME for publication in the JOURNAL OF SOLAR ENERGY ENGINEERING: INCLUDING WIND ENERGY AND BUILDING ENERGY CONSERVATION. Manuscript received September 3, 2014; final manuscript received January 18, 2016; published online February 23, 2016. Assoc. Editor: Dr. Akiba Segal.
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Nixon, J. D., and Davies, P. A. (February 23, 2016). "Construction and Experimental Study of an Elevation Linear Fresnel Reflector." ASME. J. Sol. Energy Eng. June 2016; 138(3): 031001. https://doi.org/10.1115/1.4032682
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