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Design and control of a new HFO refrigerant single phase supersonic vapor jet cooling system / Mohamed Rashed Helmy Abdelmagid ; Supervised Sayed Ahmed Kaseb , Mahmoud Abdelwahab Kasem , Omar Huzayyin

By: Contributor(s): Material type: TextTextLanguage: English Publication details: Cairo : Mohamed Rashed Helmy Abdelmagid , 2021Description: 111 P. : charts , facsimiles ; 30cmOther title:
  • التصميم و التحكم فى الضاغطات الحرارية البخارية الفوق صوتية أحادية الطور فى دوائر التبريد المستخدمة لوسيط التبريد الجديد ذات الأوليفينات الهيدروفلورية [Added title page title]
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Dissertation note: Thesis (Ph.D.) - Cairo University - Faculty of Engineering - Department of Mechanical Power Engineering Summary: 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
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Item type Current library Home library Call number Copy number Status Date due Barcode
Thesis Thesis قاعة الرسائل الجامعية - الدور الاول المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.13.11.Ph.D.2021.Mo.D (Browse shelf(Opens below)) Not for loan 01010110083158000
CD - Rom CD - Rom مخـــزن الرســائل الجـــامعية - البدروم المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.13.11.Ph.D.2021.Mo.D (Browse shelf(Opens below)) 83158.CD Not for loan 01020110083158000

Thesis (Ph.D.) - Cairo University - Faculty of Engineering - Department of Mechanical Power Engineering

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

Issued also as CD

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