Submitted on: 04 June 2001.
Revised on: 13 July 2001.
Accepted on: 30 July 2001.
___________________APPLIED THERMAL ENGINEERING---PERGAMON-ELSEVIER SCIENCE LTD
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Submitted on: 29 January 2005.
Revised on: 26 March 2005.
Accepted on: 23 April 2005.
___________________APPLIED THERMAL ENGINEERING---PERGAMON-ELSEVIER SCIENCE LTD
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