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Comparative analysis of performance of two Scheffler solar concentrators having different concentration ratios
, Prof S. Suyambazhahan, Prof S. Ramchandra
Published in Engg Journals Publications
Volume: 9.0
Issue: 2.0
Pages: 704.0 - 709.0
Two different Scheffler concentrators with concentration ratio 48 and 17 were installed and experimentation was carried out to improve the performance of the Scheffler solar concentrator system. Receiver is the heart of the system. Parameters used for experimentation are related to receiver only. Shape of receiver, position of receiver, inlet temperature of water of receiver, covering of receiver with glass to reduce convection losses. Concentration ratio is the ratio of aperture area to receiver area both Scheffler concentrators have receiver of same size and volume. scheffler with concentration ratio 48 generates steam up to 3 bar gauge pressure of steam and heat gain rate is 2 kw, and scheffler with concentration ratio 17 develops up to 1 bar gauge pressure of steam and heat gain rate is 0.6 kw. If temperature of water at inlet is 50 degree instead of 30 degree, performance of Schefflers improves due to reduction in thermal inertia. Conical receiver due to more surface area for heat transfer during tilt gives better performance than cylindrical receiver to generate steam. As solar radiations increases efficiency of Scheffler solar concentrators decreases. If wind speed increases from 1 to 3 m/s efficiency decreases.
About the journal
JournalInternational Journal of Engineering and Technology (IJET)
PublisherEngg Journals Publications
Open AccessYes