Topic
Thermal efficiency
About: Thermal efficiency is a research topic. Over the lifetime, 20911 publications have been published within this topic receiving 302373 citations. The topic is also known as: thermodynamic efficiency & efficiency.
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TL;DR: In this article, a utility coal-fired boiler was retrofitted with air staging to improve boiler thermal efficiency and to reduce NOx emission, the influencing factors including the overall excessive air ratio, the secondary air distribution pattern, the damper openings of CCOFA and SOFA, and pulverized coal fineness were investigated.
108 citations
TL;DR: In this article, the effects of boosting, increased geometric compression ratio (CR) and cooled exhaust gas recirculation (EGR) to further improve fuel economy within acceptable knock tolerance has been investigated using a 2.0-L downsized boosted SIDI engine over a wide range of engine operating conditions from 1000-rpm to 3000-rpm at low to high loads.
108 citations
TL;DR: In this paper, an experimental work has been performed to compare the combustion, performance and emission characteristics of a compression ignition engine running with diesel and three different blends of diesel and biodiesel (castor oil methyl ester, COME).
108 citations
TL;DR: In this article, the cylindrical, conical and spherical geometries of a cavity receiver are considered with the objective of analysing their optical and thermal behaviour optically and thermally, using the ray tracing method and a Computational Fluid Dynamic (CFD) model.
107 citations
TL;DR: In this article, the fundamental effect of thermal resistance on the optimal performance of a three-heat-source refrigerator was investigated and the conclusions obtained were more realistic than those of classical thermodynamics.
Abstract: An endoreversible three‐heat‐source refrigerator only affected by thermal resistance, like a reversible three‐heat‐source refrigerator, may be treated as a combined cycle of a two‐heat‐source engine driving a two‐heat‐source refrigerator. The theory of finite time thermodynamics in two‐heat‐source cycles is then used to analyze it and derive its basic optimum relation. Thus, the fundamental effect of thermal resistance on the optimal performance of a three‐heat‐source refrigerator is expounded. The conclusions obtained here are more realistic than those of classical thermodynamics. They provide some new theoretical bases for further exploitation of the three‐heat‐source refrigeration apparatus that applies to ‘‘cheap’’ heat sources, such as solar energy, geothermal energy, waste heat, and so on.
107 citations