This article reviews the progression of refrigerants, from early uses to the present, and then
addresses future directions and candidates. The article breaks the history into four …

This paper presents recent developments and state of the art for transcritical CO2 cycle
technology in various refrigeration, air-conditioning and heat pump applications. The focus …

Hydrofluorocarbons, currently used as refrigerants in air-conditioning systems, are potent
greenhouse gases, and their contribution to climate change is projected to increase. Future …

With carbon emission levels on the rise, rapid and far-reaching action is needed to
counteract global warming. Among many available strategies, CO 2 is nowadays more and …

CO 2 subcooling has resulted a method to upgrade the performance of CO 2 refrigeration
plants in the recent years, with overall improvements up to 12% with internal heat …

Low global warming potential refrigerants R1234ze (E) and R1234ze (Z) are anticipated to
be the refrigerants of choice for high-temperature heat pump systems in industrial …

This study investigates the performance of two novel compression absorption cascade
refrigeration systems, the Ejector Compression Absorption Cycle (ECAC) and Ejector …

Abstract Ultra-Low Temperature (ULT) solutions have been researched in response to the
rising demand for energy-efficient and environmentally favorable refrigeration systems. This …

This paper evaluates performance merits of CO2 and R134a automotive air conditioning
systems using semi-theoretical cycle models. The R134a system had a current-production …

This paper comprehensively reviews the recent studies on advanced vapor compression
cycle technologies. These technologies are categorized in three groups: subcooling cycles …