Effective Efficiency of Solar Air Heaters of Different Types of Roughness Geometries over Absorber Plate

Authors

  • Maneesh KAUSHAL Larsen and Toubro Limited, Engineering Design and Research Centre, Chennai 600089
  • Varun GOEL Department of Mechanical Engineering, National Institute of Technology, Hamirpur 177005

Keywords:

Solar air heater, artificial roughness, heat transfer, thermohydraulic performance, friction factor

Abstract

Artificial roughness has been found to enhance the rate of heat transfer in solar air heater ducts. However, improvement in heat transfer enhancement is invariably accompanied by increased pumping power. Several investigators have investigated the effect of different types of roughness on solar air heaters on the basis of heat transfer and friction factor. This paper presents a comparison of effective efficiency of solar air heaters of various types of roughness geometries over the absorber plate. These geometries have been used by various investigators in order to increase the heat transfer and friction factor in solar air heaters. Based upon correlations developed by various investigators, effective efficiency is also compared for a set of roughness geometries within the investigated range of operating parameters.

doi:10.14456/WJST.2014.92

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Author Biography

Maneesh KAUSHAL, Larsen and Toubro Limited, Engineering Design and Research Centre, Chennai 600089

Department: Heating Ventilation and Aie-Conditioning,

Rank: Design Engineer

References

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Published

2014-01-21

How to Cite

KAUSHAL, M., & GOEL, V. (2014). Effective Efficiency of Solar Air Heaters of Different Types of Roughness Geometries over Absorber Plate. Walailak Journal of Science and Technology (WJST), 11(9), 729–738. Retrieved from https://wjst.wu.ac.th/index.php/wjst/article/view/756

Issue

Section

Review Article