1. Chemical and Petroleum Engineering Department, Sharif University of Technology, P.O. Box 11155-9465, Tehran 145888-9694, Iran
2. Mechanical Engineering Department, Sharif University of Technology, P.O. Box 11155-9567, Tehran 145888-9694, Iran
3. TTM, Technik Thermischer Maschinen, Fohrhölzlistrasse 14b, CH-5443 Niederrohrdorf, Switzerland