Heat transfer and friction factor correlation development for double-pass solar air heater having V-shaped ribs as roughness elements. Issue 1 (2nd January 2017)

• Record Type: Journal Article
• Authors: Sharma, A.; Bharadwaj, G.; Varun,
• Is Part Of: Experimental heat transfer. Volume 30:Issue 1(2017)
• Page Start: 77
• Page End: 90
• Publication Date: 2017-01-02
• Subjects: heat transfer -- friction factor -- Nusselt number -- double-pass solar air heater; Heat -- Transmission -- Measurement -- Periodicals; 621.4022
• DOI: 10.1080/08916152.2016.1161676
• Languages: English
• ISSNs: 0891-6152

Abstract

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 / D h ), 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.