Submitted on: 24 January 2002.
Revised on: 08 May 2002.
Accepted on: 26 June 2002.
___________________JOURNAL OF ENERGY ENGINEERING---ASCE-AMER SOC CIVIL ENGINEERS
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Submitted on: 24 June 2012.
Revised on: 04 August 2012.
Accepted on: 31 August 2012.
___________________JOURNAL OF ENERGY ENGINEERING---ASCE-AMER SOC CIVIL ENGINEERS
Submitted on: 22 February 2015.
Revised on: 12 April 2015.
Accepted on: 10 June 2015.
___________________JOURNAL OF ENERGY ENGINEERING---ASCE-AMER SOC CIVIL ENGINEERS
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Submitted on: 07 October 2011.
Revised on: 10 January 2012.
Accepted on: 22 January 2012.
___________________JOURNAL OF ENERGY ENGINEERING---ASCE-AMER SOC CIVIL ENGINEERS