The following information was submitted:
Transactions: WSEAS TRANSACTIONS ON HEAT AND MASS TRANSFER
Transactions ID Number: 32-310
Full Name: Pulagala Rao venkateswara
Position: Associate Professor
Age: ON
Sex: Male
Address: Department of Mechanical Engineering, Andhra University, Visakhapatnam-530 003, Andhra Pradesh
Country: INDIA
Tel: 94403 31432
Tel prefix: +91
Fax: +91-891-2747969
E-mail address: prof.pvrao@gmail.com
Other E-mails: prof_pvrao@yahoo.co.in
Title of the Paper: influence of key properties of pongamia biodiesel on performance combustion and emission characteristics of a di diesel engine
Authors as they appear in the Paper: 1. Chaliki Satyanarayana, 2. Pulagala venkateswara Rao
Email addresses of all the authors: prof.pvrao@gmail.com , prof_pvrao@yahoo.co.in , satyanarayanachaliki@gmail.com , chaliki50@gmail.com
Number of paper pages: 11
Abstract: The purpose of this study is to examine the influence of key properties of pongamia biodiesel on engine performance, combustion, and emission characteristics of direct injection diesel engine. The key properties of the pongamia biodiesel such as viscosity, density, bulk modulus, calorific value, iodine value, cetane number, saturation% and oxygen% are considered for this study. Experiments were conducted in a naturally aspirated, single cylinder, four-stroke, stationary, water cooled, constant rpm, in-line (pump-high pressure tube-fuel injector) direct injection diesel engine with pongamia biodiesel (with and without preheating), and petroleum diesel as fuels. The performance was evaluated in terms of fuel consumption, brake specific energy consumption, and thermal efficiency. A significant improvement in thermal efficiency was observed with preheated biodiesel. The peak pressures and peak heat release rates for biodiesel was slightly higher than diesel fuel. The h!
igh peak pressures of the biodiesel are probably due to dynamic injection advance caused by their higher bulk modulus. The higher values of peak heat release rates indicate better premixed combustion with the biodiesel. However, the peak pressures for preheated biodiesel decreases due to late injection and faster evaporation of the fuel. It was observed that at full load the nitric oxide emission of biodiesel is increased by 6 %. The hydrocarbon emissions of the biodiesel are very low and are reduced up to 32 % as compared to that of diesel fuel. There is a significant reduction in all exhaust gaseous emissions. Also a considerable reduction in nitric oxide emission is observed with preheated biodiesel due to change in premixed combustion phase. However when the preheated biodiesel is used, the smoke emission was increased due to prolonged combustion (diffusion) at lower viscosity. A considerable reduction in carbon monoxide emission was also observed with the preheated bio!
diesel.
Keywords: Pongamia, Properties, Bulk modulus, Preheating, DI diesel engine, Combustion, Emissions
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