Hi, what do you want to do?
Colorado State University
Csu: Model of Basic Otto Cycle
This site from the Colorado State University discusses the Otto cycle of a car engine. Includes a highly mathematical treatment of the efficiency of such engines. Includes a link to a java applet investigating the efficiency of such...
University of Sydney (Australia)
Thermal Physics Module: Refrigerators and Heat Pumps [Pdf]
Refrigerators and heat pumps are described. Their operation is explained and the variables which improve their efficiency is discussed.