Design Investigations on Solar Cooking Devices for Rural India

  • S.K. Shukla Department of Mechanical Engineering, Indian Institute of Technology (BHU), Varanasi
  • R.K. Khandal
Keywords: Parabolic disc collector, Exergy analysis, Concentration ratio, Stagnation temperature, Optimum collector temperature, ambient temperature

Abstract

This article discusses the usefulness of Second Law analysis (exergy analysis) for comparing and optimizing the performance of solar collectors. Here, the exergetic formulas for both the parabolic and flat plate collectors are deduced and a parametric study is made using hourly solar radiation. The exergy output is optimized with respect to the collector temperature and different parameters are calculated. It is found that most of the parameters such as exergy output, exergetic and thermal efficiencies, stagnation temperature, increases with a rise in solar intensity for both the collectors. However initially, the value of exergetic efficiency varies in accordance with the solar intensity but declines further with an increase in solar intensity for parabolic collector.

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Author Biographies

S.K. Shukla, Department of Mechanical Engineering, Indian Institute of Technology (BHU), Varanasi

S.K. Shukla, the corresponding author, Department of Mechanical Engineering, Indian Institute of Technology (BHU), Varanasi – 221005, India. E-mail: shuskla@gmail.com

R.K. Khandal

R.K. Khandal is Vice Chancellor, UPTU Lucknow, India.

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