Abstract CO2 refrigerant and its transcritical cycle system have become the research focus in refrigeration field due to their advantages of environmentally friendly, safe low environmental temperature adaptability. This paper summarizes progress on modified methods for defects basic recent years. Meanwhile, technical status technology commercial supermarket refrigeration, heat pump system, aut...

Natural technologies for sustainability: accelerating implementation The Life-C4R project is an international marketing that, thanks to Epta’s Full Transcritical Efficiency (FTE) and Extreme Temperature (ETE) systems, will substantially contribute replacing HCFC HFC greenhouse refrigerants with CO2 in commercial refrigeration a very simple, efficient reliable way any country, external temperatu...

In order to improve their efficiency, transcritical CO2 heat pumps need resort the use of a subcooling method. Among different methods, dedicated mechanical (DMS) systems and internal exchangers (IHX) are currently more promising technologies. This paper presents numerical study water source pump during hot generation using methods. Ten configurations, including both, IHX DMS, separately combin...

This report summarizes our recent implementation of a crossover formulation in the lattice Boltzmann method and its application modeling transcritical CO2 sequestration water-saturated porous media. A enhancement Peng-Robinson equation state increases accuracy predicting fluid properties conditions, which is relevant sequestration. The leads to prediction liquid-vapor coexistence curves closer ...

Comparative energy and exergy investigations are reported for a transcritical N2O refrigeration cycle with a throttling valve or with an expander when the gas cooler exit temperature varies from 30 to 55 ◦C and the evaporating temperature varies from −40 to 10 ◦C. The system performance is also compared with that of similar cycles using CO2. Results show that the N2O expander cycle exhibits a l...