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

Giacomo Pierucci, Sahand Hosouli, Michele Salvestroni, Matteo Messeri, Federico Fagioli, Francesco Taddei and Maurizio De Lucia
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Giacomo Pierucci: Department of Industrial Engineering, University of Florence, Florence 50139, Italy
Sahand Hosouli: Department of Industrial Engineering, University of Florence, Florence 50139, Italy
Michele Salvestroni: Department of Industrial Engineering, University of Florence, Florence 50139, Italy
Matteo Messeri: Department of Industrial Engineering, University of Florence, Florence 50139, Italy
Federico Fagioli: Department of Industrial Engineering, University of Florence, Florence 50139, Italy
Francesco Taddei: Department of Industrial Engineering, University of Florence, Florence 50139, Italy
Maurizio De Lucia: Department of Industrial Engineering, University of Florence, Florence 50139, Italy

Energies, 2018, vol. 11, issue 10, 1-9

Abstract: 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 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 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.

Keywords: micro parabolic trough collectors; thermal loss absorber; test rig; renewable sources; solar collectors for residential applications (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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