Browsing by Author "Ünal, Şaban"
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An experimental study on a bus air conditioner to determine its conformty to design and comfort condition
Ünal, Şaban (Yildiz Technical University Press, 2017)The air conditioning system for a bus should be selected considering a number of parameters, including passenger capacity, local climatic conditions, and fuel consumption. It is possible to determine whether a selected air ... -
Döner tip rejeneratör diferansiyel denklemlerinin çözümü için en uygun sınır şartlarının belirlenmesi
Ünal, Şaban (GAZI UNIV,, 2020)Rotary type regenerators are used for energy recovery from waste heat, especially in low temperature applications such as air conditioning systems. In this study, the developed mathematical model for rotary type regenerators ... -
Performance improvement potentials of low global warming potential refrigerants for intercity bus air conditioning system
Ünal, Şaban; Kutlu, Çağrı; Erdinç, M. Tahir (Serbian Society of Heat Transfer Engineers, 2018)In this study, theoretical investigation of two evaporator ejector refrigeration system was carried out based on energy and exergy analysis using R134a and low global warming potential refrigerants (namely R1234yf and ... -
Thermodynamic analysis of a refrigeration system with double evaporators and ejector
Ünal, Şaban; Erdinç, Mehmet Tahir; Kutlu, Çağrı (GAZI UNIV,, 2016)In this study, theoretical investigations of double evaporator refrigeration system and with adding an ejector to the current system were carried out using energy and momentum equations. The relative increase in COP with ... -
Thermodynamic analysis of bi- evaoparator ejector refrigeration cycle using R744 as natural refrigerant
Kutlu, Çağrı; Ünal, Şaban; Erdinç, Mehmet Tahir (YILDIZ TECHNICAL UNIV., 2016)Researchers have been focused on refrigerant R744 because it is a natural refrigerant and its Global Warming Potential value is 1. However, coefficient of performance (COP) of refrigeration systems that use R744 as refrigerant ...