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Performance evaluation of a low heat rejection diesel engine with Jatropha oil based bio-diesel |
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| รหัสดีโอไอ | |
| Creator | 1. P.V.K. Murthy 2. M.V.S. Murali Krishna 3. A. Sitarama Raju 4. N. Janarthan 5. P. Ushasri |
| Title | Performance evaluation of a low heat rejection diesel engine with Jatropha oil based bio-diesel |
| Publisher | School of Renewable Energy Technology |
| Publication Year | 2556 |
| Journal Title | International Journal of Renewable Energy |
| Journal Vol. | Vol. 8 |
| Journal No. | No.1 |
| Page no. | 31-48 |
| Keyword | Bio-diesel, LHR engine, fuel performance, exhaust emissions, combustion characteristics |
| ISSN | 1905-7172 |
| Abstract | Investigations were carried out to evaluate the performance of a low heat rejection (LHR) diesel engine consisting of air gap insulated piston with 3-mm air gap, with superni (an alloy of nickel) crown, air gap insulated liner with superni insert and ceramic coated cylinder head with different operating conditions of jatropha oil based bio-diesel with varied injection timing and injection pressure. Performance parameters are determined at various magnitudes of brake mean effective pressure (BMEP). Exhaust emissions of smoke and oxides of nitrogen (NOx) are recorded at different values of BMEP. Combustion characteristics of the engine are measured with TDC (top dead centre) encoder, pressure transducer, console and special pressure-crank angle software package. Conventional engine (CE) showed deteriorated performance, while LHR engine showed improved performance with bio-diesel (BD) operation at recommended injection timing and pressure. Performance of both version of the engine is improved with advanced injection timing and higher injection pressure when compared with CE with pure diesel operation. Relatively, peak brake thermal efficiency (BTE) increased by 12%, brake specific energy consumption (BSEC) at peak load decreased by 1%, exhaust gas temperature (EGT) at peak load increased by 35 oC , coolant load (CL) at peak load decreased by 10%, volumetric efficiency (VE) at peak load decreased by 10%, smoke levels at peak load decreased by 6% and NOx levels at peak load increased by 47% with LHR engine with biodiesel at recommended injection timing of 27obTDC, when compared with pure diesel operation on CE at 27obTDC . |
