Mertkan Arslan F.Günerhan H.2019-10-262019-10-2620192555-04032555-0403https://doi.org/10.1051/e3sconf/201911101054https://hdl.handle.net/11454/1563313th REHVA World Congress, CLIMA 2019 -- 26 May 2019 through 29 May 2019 -- 150961In this study energetic and exergetic performances of parabolic trough collector is theoretically investigated by using 120 l/min synthetic ''Dowtherm A'' oil, 1200 l/min Air at 100 bar (10 MPa) and 150 l/min molten salt which is mixture of 60 wt% sodium nitrate (NaNO3) and 40 wt% potassium nitrate (KNO3) which are widely used as heat transfer fluids. Fluids performance comparisons were performed with the LS-2 module, which is used with vacuum in annulus and Cermet as a selective coating. LS-2 module has 7.8 m receiver length and is 39 m2 aperture area. As a result, the maximum exergy efficiency of the molten salt, synthetic oil, Air to be 41.19% at 422 °C, 40.82% at 400 °C, 40.33% at 402 °C, respectively. The maximum exergy of air is higher than other working fluids up to 310 ° C but after about 310 ° C the exergy of the molten salt is higher than the others. The molten salt has the best energy efficiency at its operating temperatures (250 °C to 550 °C) than other working fluids. © The Authors, published by EDP Sciences. This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0en10.1051/e3sconf/201911101054info:eu-repo/semantics/openAccessConference Object111N/A