Title: Parametric analysis of Scheffler concentrator with convex receiver for direct steam generation
Authors: Dnyaneshwar Malwad; Vinod Tungikar
Addresses: Department of Production Engineering, Shri Guru Gobind Singhji Institute of Engineering and Technology, Nanded-431606, Maharashtra, India ' Department of Production Engineering, Shri Guru Gobind Singhji Institute of Engineering and Technology, Nanded-431606, Maharashtra, India
Abstract: In this work, Scheffler dish with improved design of the receiver is used for direct steam generation. Experiments were conducted from February to May 2019, for monthly performance assessment of 16 m2 Scheffler concentrator. Effect of varying aperture area, solar beam radiation, ambient temperature and wind speed on the thermal efficiency of the system is investigated. The average receiver temperature at focus observed to be 323°C with average beam radiation 656 W/m2. From the results, the thermal efficiency of the system is reduced by 2.36% with a decrease in aperture area from 12.82 m2 to 9.59 m2. The average thermal efficiency of the system decreased linearly from 57.29% to 39.99% with an increase in wind speed from 0.5 m/s to 6 m/s where as it reduced by 1.13% with an increase in ambient temperature from 24°C to 46°C.
Keywords: Scheffler dish; beam radiation; aperture area; direct steam generation; monthly performance; thermal efficiency.
International Journal of Renewable Energy Technology, 2020 Vol.11 No.4, pp.319 - 334
Received: 02 Feb 2020
Accepted: 25 Sep 2020
Published online: 12 Mar 2021 *