Experimental Methodology and Thermal Loss Tests on Small Size Absorber Tubes for Solar Applications

Experimental Methodology and Thermal Loss Tests on Small Size Absorber Tubes for Solar Applications

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Since thermal energy for residential applications is a relevant part of the entire energy demand, solar technologies could play an important role in decreasing fossil fuel consumption.A novel small peperomia double duty parabolic trough collector matched with a storage system is developed to satisfy heating and required hot water demand for a single house.A new receiver concept is designed and a prototype is realized using two coaxial tubes (three spattered layers).A covering glass with vacuum inside completes the high tech design.Because of numerous innovations including the small size, a specific off-Sun measurement procedure is laguna 3hp dust collector set up with the aim of evaluating the real thermal loss and direct heating of the absorber by Joule effect.

A novel test procedure is proposed for the one-end absorber.The receiver performance results are reported under vacuum conditions and with air at ambient pressure.