Heat transfer and friction factor correlation development for double-pass solar air heater having V-shaped ribs as roughness elements |
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| Authors: | A Sharma G Bharadwaj Varun |
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| Institution: | 1. Department of Mechanical Engineering, GLA, University, Mathura, UP, India;2. Department of Mechanical Engineering, National Institute of Technology, Hamirpur, HP, India |
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| Abstract: | In this present study, an experimental investigation has been carried out for a roughened double-pass solar air heater. The respective variation in other parameters, such as relative roughness pitch (p/e), relative roughness height (e/Dh), and angle of attack (α), were 5–20, 0.022–0.044, and 30°–75°, respectively. The effect of roughness and operating parameters on Nusselt number (Nu) and friction factor (f) has been determined, and the results are compared with those of a smooth absorber plate; considerable enhancement in both heat transfer and friction factor is noticed. Utilizing these experimental data, correlations for Nusselt number and friction factor correlations were also developed. |
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| Keywords: | heat transfer friction factor Nusselt number double-pass solar air heater |
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