Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7045857 | Applied Thermal Engineering | 2018 | 31 Pages |
Abstract
Linear Fresnel collectors are promising technologies for the exploitation of solar irradiation in medium and high temperatures. In this study, a linear Fresnel collector with flat primary mirrors and a parabolic shape secondary reflector is investigated. The location of the secondary reflector is simply optimized and then the collector is investigated under different incident angles (transversal and longitudinal). The next step is the thermal analysis of the collector with three different working fluids: thermal oil, molten salt and liquid sodium. The analysis is performed for temperatures up to 900â¯K with liquid sodium in order to examine the collector up to its stagnation temperature. Both the optical and thermal analysis are conducted with SolidWorks Flow Simulation. According to the final results, the exergy performance of the collector is maximized at 700â¯K and it is 30.20% with liquid sodium and 30.05% with molten salt. Generally, liquid sodium was found to be the best candidate according to performance criteria, with molten salt and thermal oil to follow. The high heat transfer coefficient is the reason for the superior performance of the liquid sodium. Moreover, the pumping work is maximized for operation with molten salt.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
Evangelos Bellos, Christos Tzivanidis, Angelos Papadopoulos,