Thermal Efficiency of LPG and PNG-fired burners: Experimental and numerical studies

Boggavarapu, Prasad and Ray, Baidurja (2014) Thermal Efficiency of LPG and PNG-fired burners: Experimental and numerical studies. In: FUEL, 116 . pp. 709-715.

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Abstract

In the present work, the thermal efficiency of a conventional domestic burner is studied both experimentally and numerically for liquefied petroleum gas (LPG) and piped natural gas (PNG) fuels. Three-dimensional computational fluid dynamic (CFD) modeling of the steady-state flow, combustion and heat transfer to the vessel is reported for the first time in such burners. Based on the insights from the CFD model concerning the flow and heat transfer, design modifications in the form of a circular insert and a radiant sheet are proposed which are observed to increase thermal efficiency for LPG. For PNG, predictions showed that loading height was a much more important factor affecting efficiency than these design modifications and an optimal loading height could be identified. Experiments confirm these trends by showing an improvement in burner thermal efficiency of 2.5% for LPG with the modified design, and 10% for PNG with the optimal loading height, demonstrating that the CFD modeling approach developed in the present work is a useful tool to study domestic burners. (C) 2013 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	FUEL
Publisher:	ELSEVIER SCI LTD
Additional Information:	copyright for this article belongs to ELSEVIER SCI LTD,ENGLAND
Keywords:	Domestic burners; CFD; Combustion; Piped natural gas (PNG); Liquid Petroleum Gas (LPG)
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	16 Jan 2014 11:14
Last Modified:	16 Jan 2014 11:14
URI:	http://eprints.iisc.ac.in/id/eprint/48044

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