Thermal efficiency

TL;DR: In this article, the thermal and fluid-dynamic behavior of a single-pass and double-pass solar parabolic trough collector is analyzed in the presence of recycle at the ends.

TL;DR: In this paper, the performance enhancement of a conventional diesel engine through the addition of H2/O2 mixture, generated through water electrolysis, was evaluated under constant speed with varying load and amount of hydrogen mixture.

TL;DR: In this paper, an experimental study was conducted on a Euro IV diesel engine to evaluate the performance, combustion and emission characteristics of pure biodiesel and its blend fuels, and the results showed that the use of biodiesel/blend fuels resulted in a higher brake specific fuel consumption, especially at low engine speed and partial load conditions.

TL;DR: In this paper, the authors proposed a bi-metallic approach to establish a cost-effective counterflow primary surface recuperator for higher temperature service, based on the assumptions made in this paper it is postulated that in the 100 kW size the maximum thermal efficiency attainable for an all-metall engine is 35%.

TL;DR: In this article, a novel type of solar air heater is proposed to minimize heat losses from the front cover of the collector and to maximize heat extraction from the absorber by forcing air to flow over the front glass cover (preheat the air) before passing through the absorbber.