Thermal efficiency

TL;DR: In this article, low concentrations of ethanol (2.5% and 5%) were studied in the blend of neat lemongrass oil-diesel blend and the test results obtained with these blends were compared with those obtained with diesel fuel.

TL;DR: In this article, the effects of natural gas injection timing on engine combustion performance and emissions were investigated on a 2.8-L four-cylinder, natural gas manifold injection dual-fuel engine.

TL;DR: In this paper, the performance of a four-cylinder spark-ignited (SI) gasoline engine equipped with a hydrogen port-injection system was evaluated at idle and lean conditions.

TL;DR: In this article, an experimental investigation on collector efficiency and pressure drop in a solar air heater with multiple s-shaped ribs with gaps as the roughness element is presented, which can enhance the heat transfer between air and heat absorber plate sufficiently.

TL;DR: In this paper, a technique to optimise thermal efficiency using brine recycling during direct contact membrane distillation (DCMD) of seawater was investigated, and the results showed that in the optimal water recovery range of 20 to 60% facilitated by brini recycling, the specific thermal energy consumption of the process could be reduced by more than half.