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2011 (Vol. 3, Issue: 05)
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 

Key words:  Furnace, heat balance, non-ferrous, thermal efficiency, , ,
Vol. 3 , (05): 471-473
Submitted Accepted Published
2011 March, 08 2011 April, 07 2011 May, 25

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.
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  Cite this Reference:
O.A. Ighodalo and C.I. Ajuwa, 2011. Heat Balance Determination for a Gas-Fired Furnace for Melting Non-Ferrous Metals.  Research Journal of Applied Sciences, Engineering and Technology, 3(05): 471-473.
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ISSN (Online):  2040-7467
ISSN (Print):   2040-7459
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