The efficiency of the ejector cycle is very sensitive to the ejector efficiency. This paper provides a literature review on ejector efficiencies in various ejector systems, such as vapor compression systems, solar driven ejector systems. The definitions of overall ejector efficiency and ejector component efficiencies in literature are summarized. The assumed constant ejector component efficienc...

In recent years, ejectors have received much attention because of their ability to reduce throttling losses and increase the efficiency of stationary and mobile air-conditioning systems. While much of the initial research was carried out with high pressure fluids, such as carbon dioxide, it was soon discovered that ejectors can also offer significant advantages in systems that utilize low press...

Although various investigations of Atkinson cycle have been carried out, distinct output power and thermal efficiencies of the engine have been achieved. In this regard, thermal efficiency, Ecological Coefficient of Performance (ECOP), and Ecological function (ECF) are optimized with the help of NSGA-II method and thermodynamic study.  The Pareto optimal frontier ...

This paper aims to provide comprehensive 4E (energy, exergy, exergoeconomic, and exergoenvironmental) advanced exergy analyses of the Refrigeration Cycle (RC) Heat Recovery (HRRC) comparison performance with R744 (CO2) R744A (N2O) working fluids. Moreover, multi-objective optimization systems has been considered define optimal conditions best cycle from various perspectives. In HRRC, heat recov...

â liquefied natural gas (lng) is the most economical way of transporting natural gas (ng) over long distances. liquefaction of ng by using vapor compression refrigeration system requires high operating and capital cost. due to lack of systematic design methods for multistage refrigeration cycles, the conventional approaches of determining optimal cycle configuration are mostly based on trial-an...

This study aims to simulate a solar ejector refrigeration system in the region of Adrar (27.82 N, 0.18 W). It is first investigation such this region, importance benefit from free intense energy for cooling and air conditioning reduce using electrical produced by thermal power station which harmful environment causing warming global. theoretical real gas equation (REFPROP database). The inspect...