The best way to meet the European Union's energy awareness goals is use a heat pump/refrigerator that requires renewable or waste operate. Absorption machines are often powered by heat. This article, it was examined how absorption chillers can be optimized for cooling. increasing minima of cooling exergy efficiency chillers. effects this increase on quantitative and qualitative indicators were ...

Metal Foam-enhanced Cascaded Thermal Energy Storage (MF-CTES) has been proposed to solve the problem of poor heat transfer during heat exchange process, which is caused by unavoidable decrease of temperature differences. This paper conducts a theoretical study examining the overall thermal performance of STES (Single-stage Thermal Energy Storage), CTES (Cascaded Thermal Energy Storage) and MF-C...

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...

An innovative biomass gasifier integrated plant was proposed for combined heating and power production in the current paper. The consists of an s-CO2 cycle, gasifier, combustion chamber, a domestic water heater purposes. system studied from different perspectives, i.e., energetic, exergetic, exergo-economic, economic, environmental (4E). For this purpose, simulation carried out by EES software;...

The purpose of this research is to investigate thermoeconomic optimization and exergy analysis of transcritical CO2 refrigeration cycle with an ejector. After modeling thermodynamic equations of elements and considering optimization parameters of emerging temperature of gas of cooler (Tgc) , emerging pressure of cooler's gas (Pgc) , and eva...