E3S Web Conf.
Volume 111, 2019CLIMA 2019 Congress
|Number of page(s)||9|
|Section||Advanced HVAC&R&S Technology|
|Published online||13 August 2019|
Investigation of energetic and exergetic performances of parabolic trough collector with using different heat transfer fluids
1 Ege University, Graduate School of Natural and Applied Science, 35100, Bornova-Izmir-Turkey
2 Ege University, Faculty of Engineering, Mechanical Engineering Department, 35100, Bornova-Izmir-Turkey
* Corresponding author: firstname.lastname@example.org
In 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, 2019
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