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, the authors examined combustion in a dual-fuel methanol-Diesel heavy duty engine using three different methanoline injection configurations: port injection into the intake manifold; direct injection during the intake stroke (DI_E); and direct injection in the compression stroke(DI_L).
79 citations
TL;DR: In this paper, the effects of variation in volumetric efficiency on the engine emissions characteristics with different LPG usage levels (25, 50, 75, and 100%), on an engine operated with new generation closed loop, multi-point, and sequential gas injection system were investigated.
79 citations
TL;DR: In this paper, a performance optimization based on the ecological coefficient of performance (ECOP) criterion has been carried out for an irreversible regenerative Brayton heat-engine, and the results obtained were compared with those using the power-output criterion and alternative ecological performance objective-function defined in the literature.
79 citations
TL;DR: In this paper, the effects of spark discharge energy and in-cylinder turbulence level on lean limits and cycle-to-cycle variations of combustion for SI engine operation were examined.
79 citations
TL;DR: In this article, the effect of methanol and butanol addition to gasoline on brake specific fuel consumption (b.s.c.), exhaust gas temperature, and thermal efficiency has been experimentally investigated.
Abstract: The effect of methanol and butanol addition to gasoline on brake specific fuel consumption (b.s.f.c.), exhaust gas temperature, and thermal efficiency has been experimentally investigated. A Hydra single cylinder, spark ignition, fuel injection engine was used over a wide range of fuel/air equivalence ratio (ϕ=0⋅8 to 1⋅3) for 30% volume alcohol–gasoline blends. The goal of this work is to study the engine performance when methanol and butanol–gasoline blends are used. The performance measurements show that there is an increase in b.s.f.c. when using alcohol–gasoline blends, and b.s.f.c. of a butanol–gasoline blend is less than for a methanol–gasoline blend. The experimental results show that the engine thermal efficiency was decreased when fueled with alcohol–gasoline blends. It was found that there was about a 4.5% reduction in engine thermal efficiency at ϕ=1⋅0 when 30% butanol was blended with gasoline compared to pure gasoline. The exhaust gas temperature measurements show that there is an increase in temperature in the case of using gasoline as compared to alcohol–gasoline blends, and that the temperature reaches a maximum at ϕ≈1⋅1 when using gasoline and alcohol–gasoline blends. © 1997 by John Wiley & Sons, Ltd.
78 citations