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Two-zone modeling of diesel / biodiesel blended fuel operated ceramic coated direct injection diesel engine

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Author(s): B. Rajendra Prasath, P. Tamil Porai, Mohd. F. Shabir

Journal: International Journal of Energy and Environment
ISSN 2076-2895

Volume: 1;
Issue: 6;
Start page: 1039;
Date: 2010;
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Keywords: Biodiesel | Compression ignition | Direct injection | Low heat rejection | Turbocharged

ABSTRACT
A comprehensive computer code using ”C” language was developed for compression ignition (C.I) engine cycle and modified in to low heat rejection (LHR) engine through wall heat transfer model. Combustion characteristics such as cylinder pressure, heat release, heat transfer and performance characteristics such as work done, specific fuel consumption (SFC) and brake thermal efficiency (BTE) were analysed. On the basis of first law of thermodynamics the properties at each degree crank angle was calculated. Preparation and reaction rate model was used to calculate the instantaneous heat release rate. The effect of coating on engine heat transfer was analysed using a gas-wall heat transfer calculations and total heat transfer was based on ANNAND’s combined heat transfer model. The predicted results are validated through the experiments on the test engine under identical operating conditions on a turbocharged D.I diesel engine. In this analysis 20% of biodiesel (derived from Jatropha seed oil) blended with diesel was used in both conventional and LHR engine. The simulated combustion and performance characteristics are found satisfactory with the experimental results.

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