Techniques for Performance Enhancement of Solar Air Heater: A Review

Author(s):

MITESH VARSHNEY , MALAVIYA NATIONAL INSTITUTE OF TECHNOLOGY, JAIPUR; ANKIT GOYAL, MALAVIYA NATIONAL INSTITUTE OF TECHNOLOGY, JAIPUR; KAMAL KUMAR AGRAWAL, MALAVIYA NATIONAL INSTITUTE OF TECHNOLOGY, JAIPUR; G.D. AGRAWAL, MALAVIYA NATIONAL INSTITUTE OF TECHNOLOGY, JAIPUR

Keywords:

Performance Optimization, Solar Air Heater, CFD Simulation, Artificial Roughness, Selective Coating

Abstract:

The improvement of thermal performance of solar air heater is required for increasing the heat transfer rate and minimizing the losses to reduce power consumption. This article includes a brief discussion on solar air heaters integrated artificial roughness which showed far more efficiency than the conventional solar air heater. Efficiency enhancement in all these studies is mainly based on increasing the heat transfer coefficient for increasing the heat transfer area for an effective heat transfer rate. Chamfered type of artificial roughness gives the best result among the other types of artificial roughness which about 2.77 times more the value of Nusselt number (Nu=138.5) over the smooth duct for ϕ=14.5°, e/Dh=0.0278, p/e=5.41 and W/H=4.82. Double pass solar air heater is more efficient than single pass solar air heater with the concept involved of doubling the heat transfer area. In the given study it is also investigate the effect of geometric parameters like fin length, fin height, number of fin, selective coating, thermal storage and operating parameter like mass flow rate on solar air heater.

Other Details:

Manuscript Id	:	IJSTEV3I4075
Published in	:	Volume : 3, Issue : 4
Publication Date	:	01/11/2016
Page(s)	:	157-162

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