TY  - BOOK
AU  - Mohamed Rashed Helmy Abdelmagid
AU  - Mahmoud Abdelwahab Kasem , 
AU  - Omar Huzayyin , 
AU  - Sayed Ahmed Kaseb , 
TI  - Design and control of a new HFO refrigerant single phase supersonic vapor jet cooling system / 
PY  - 2021///
CY  - Cairo : 
PB  - Mohamed Rashed Helmy Abdelmagid , 
KW  - HFO-R1234yf
KW  - Low grade energy
KW  - Sizing
N1  - Thesis (Ph.D.) - Cairo University - Faculty of Engineering - Department of Mechanical Power Engineering; Issued also as CD
N2  - Vapor jet refrigeration system bears much importance due to using low grade energy instead of the high grade energy necessary for driving the conventional vapor compression refrigeration cycles despite its low COP value.The main purpose of the present work is to introduce a mathematical model to optimally size the single phase ejector and investigate the effect of operating conditions onthe design of the optimally operated ejectors. On the other hand, this thesisintroduces a control technique to guarantee the ultimate ejector and system performance under different working conditions.The modelsare validated with experimental data mentioned in the literature and it gives high trusted results. Moreover, the introduced models are general as it can be used with any refrigerant. However, the present results belong to the environment friendly hydro-fluoroolefin refrigerant (R1234yf) which will be increasingly adopted as a potential alternative for the currently used hydroflourocarbon (HFC) R134
ER  -