Effect of pressure pulsation on COP in two-stage-compression vapor-injection cycle
Mr. Sachio Sekiya, Japan
Hitachi,Ltd R&D group, Hitachinaka

Theoretical analysis of energy efficiency on refrigerants in vapor compression refrigeration cycle under different conditions
Mr. Jiongliang Huang, People's Republic of China
Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou

Generalized COP estimation of heat pump processes for operation off the design point of equipment
Dr. Torben Ommen, Denmark
Technical University of Denmark, Kgs. Lyngby