Effect of fabricated V-rib roughness experimentally investigated in a rectangular channel of solar air heater: a compreh
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REVIEW ARTICLE
Effect of fabricated V-rib roughness experimentally investigated in a rectangular channel of solar air heater: a comprehensive review Piyush Kumar Jain 1 & Atul Lanjewar 2 & Kunj Bihari Rana 1 & Makkhan Lal Meena 3 Received: 10 June 2020 / Accepted: 26 October 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Solar power is one of the main sources of renewable energy which helps for protecting the environmental and reducing pollution. Technologies and systems for utilizing solar power are the area of research and development for a number of decades. In a solar air heater (SAH), use of fabricated irregularities on its wide face is an effective technique to augment heat discharge for flowing air with a moderate rise in frictional conduct. The necessary conditions for building an effective roughness design are to pick roughness patterns and its geometrical factors such that they may govern the nature of fluid flow with a rise in the heat discharge and lowering pumping losses. Continuous efforts are being carried out by various researchers to optimize the roughness parameters that deliver high heat release rates with low cost of pressure penalty or better thermo-hydraulic performance parameter (THPP). The researchers dominantly studied V-shaped of roughness design because of its better performance characteristics. The main intent of the present paper is to appraise or compile the influence of various V-shaped rib roughness on the thermal behavior of SAH. The outcomes of different V-designed rib roughness in terms of Nusselt number (Nu), and friction factor ( f ), statistical correlations established related to geometrical parameters and THPP are summarized. A comparative study using different Vdesigned ribs are also discussed to guide the future research and improvements. Keywords Review . Solar air heater . Fabricated V-ribs . Nusselt number . Friction factor
Introduction Energy is the base to boost the economic aspect of any country. It is an essential gradient for humans to perform any activity. The extreme worldwide demand of energy for many households and industrial applications, depletion of conventional fuels, and environmental pollution through toxic emissions pushed to find the alternative renewable energy sources. Harnessing of energy through renewable energy sources using efficient technologies is expected to play an important role in Responsible Editor: Philippe Garrigues * Kunj Bihari Rana [email protected] 1
Department of Mechanical Engineering, Rajasthan Technical University, Kota 324010, India
2
Department of Mechanical Engineering, Maulana Azad National Institute of Technology, Bhopal 462003, India
3
Department of Mechanical Engineering, Malviya National Institute of Technology, Jaipur 302017, India
serving as clean energy sources for humankind. From various observations amongst different alternative resources, it is found that solar energy is the most promising source available (Verma et al. 2020). According to a report released by the U.S. Energy Inform
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