panel data for the sample countries over the study period. A parametric method is used to compute technical efficiency … change, technical change, and scale efficiency change, which aggregate to the generalized metafrontier Malmquist productivity …

Variable-speed drives in any machine provide an accurate control and high-energy efficiency. More and more often …. The paper aims to achieve accurate efficiency estimation by presenting a new modified calculation method to predict the …

and thermal efficiencies for these cycles was performed. The findings demonstrated that the highest thermal efficiency was … achieved using the recompression Brayton cycle, at June noontime. The maximum integrated system thermal efficiency using this … cycle was 40% while the maximum thermal efficiency of this cycle alone was 52%. The regenerative Brayton cycle, although …

motors efficiency as one of the greatest energy consumption apparatuses in the world. Induction motors constitute, by far … powerful candidate with growing market are investigated in some details. The motor opportunities like high efficiency, high …

the second law efficiency of the device by 50% points, corresponding to a 3.8% point increase in thermal efficiency. …

This work compares two classes of exergy efficiency definitions and applies them on a simple process (i.e. PRICO) for … efficiency definitions already proposed in the literature. In addition, the paper highlights the importance of decomposing the …

and use of energy and exergy based performance criteria, and of the Second Law efficiency, with an aim at the advancement …

in detail. The effects of some main parameters on the exergy destruction and exergy efficiency of the cycle are … cooling along with evaporative aftercooling has an obvious increase in the energy and exergy efficiency compared to the basic … gas turbine cycle cogeneration. It is further shown that the first-law efficiency, power to heat ratio and exergy …