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Abstract
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Article Information:
Heat Balance Determination for a Gas-Fired Furnace for Melting Non-Ferrous Metals
O.A. Ighodalo and C.I. Ajuwa
Corresponding Author: O.A. Ighodalo
Submitted: 2011 March, 08
Accepted: 2011 April, 07
Published: 2011 May, 25 |
Abstract:
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A heat balance is usually carried out to determine the energy inflow and outflow for a thermal system
and thus determine the overall system performance. The heat balance for a gas-fired furnace for melting
non-ferrous metals has been determined. 50 kg of Aluminium charge was melted in the furnace and the
in-furnace, walls, roof and exhaust gas temperatures were measured. Experimental measurements taken from
the furnace operation were fed as input to a MATLAB program which was developed based on heat balance
equations. The output from the program show that about 10% of the heat energy is lost through the walls and
roof while 64% is lost through the exhaust gas. The thermal efficiency and melting efficiency determined for
the furnace are 36.39 and 54.6%, respectively. The low energy loss through the walls and roof is due to use of
appropriate wall thickness. The highest energy loss is through the exhaust, hence, the incorporation of a
recuperator to make use of exhaust gas waste heat to preheat the combustion air or the metal charge or both,
will further enhance furnace efficiency.
Key words: Furnace, heat balance, non-ferrous, thermal efficiency, , ,
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Abstract
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Cite this Reference:
O.A. Ighodalo and C.I. Ajuwa, . Heat Balance Determination for a Gas-Fired Furnace for Melting Non-Ferrous Metals. Research Journal of Applied Sciences, Engineering and Technology, (05): 471-473.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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