ON THE VALIDATION OF VESTA 2.2.0 USING THE ARIANE-GU3 SAMPLE

The validation of the VESTA 2.2.0 Monte Carlo depletion code has been initiated using the Spent Fuel Isotopic Composition Database (SFCOMPO). The work presented in this paper is limited to one fuel sample, the GU3 PWR-UOX sample from the ARIANE program, which has a reported burn up of 52.5 MWd.kgHM-1. The chemical analyses of the studied fuel sample were performed by 2 independent laboratories at the end of irradiation and cooling time. US and European evaluated nuclear data libraries, namely ENDF/B-VII.1 and JEFF-3.2, but also the more recent ENDF/B-VIII.0 and JEFF-3.3 are used for the VESTA 2.2.0 calculations. The isotopic concentration results are compared to experimental data and the C/E agreement is analyzed in the light of the previous VESTA 2.1.5 validation results obtained using ENDF/B-VII.0 and JEFF-3.1 nuclear data libraries.

Influence of Madhuca Longifolia Biodiesel Blends on Diesel Engine Characteristics

In daily life the demand for fuel is increasing and there is a need to find alternate fuels to overcome the environmental pollution problems. In this present study, experimentation was done on a diesel engine, at a speed of 1500 rpm by varying load from 0% to 100% using diesel and Madhca Longifolia biodiesel blends and the results were analysed to know the engine behaviour. Madhuca Longifolia biodiesel was prepared by using the acid catalyst method followed by transesterification process and then the tested biodiesel blended fuel samples MLB25, MLB0, MLB75, MLB100 were prepared by adding Madhuca Longifolia biodiesel in the rate of 25, 50, 75, 100 for diesel on volume basis. From the aquired results It was perceived that the performance of the engine was improved with MLB25 fuel sample compared to all other biodiesel blend fuel samples. And for all biodiesel blend fuel samples, the exhaust emissions like unburned hydrocarbons (ubhc), carbon oxide (CO), Smoke were reduced compared to the diesel and nitrogen oxide emissions (NOx) were increased slightly compared to diesel fuel. From the observed results, the MLB25 fuel sample suggested as alternate fuel in diesel engines in place of conventionsl diesel.

Combustion and Emission Characteristics of Hydrous Ethanol–Gasoline Blends with Co-solvents in Spark-ignited Single cylinder Engine

In Brazil, hydrous ethanol is blended with gasoline and is successfully implemented in flexi fuel engines and it has the potential to directly compete with fossil fuels. However, the Ethanol Blending Program of India has not been successful due to non-availability of sugarcane molasses and could not achieve its 5% blending target based on the literature review study. Hydrous ethanol with co-solvent is proposed in this work as a promising blending oxidant instead of energy-intensive anhydrous ethanol in gasoline. This research work also delves into the challenges of using hydrous ethanol in gasoline blended fuel such as water tolerance, fuel properties, and fuel selection. The selected fuel sample 2EW30TBA10, which contains 30% hydrous ethanol and 10% TBA (t-butyl alcohol), and gasoline was selected based on water tolerance of the blended sample and stability. The combustion and emission characteristics of the selected fuel sample 2EW30TBA10 are studied in 4-stroke, single cylinder, water cooled engine, and the performances are compared to base fuel (E0) and reference fuel (E10). The significant contributions of the present research work are the development of combustion model using MATLAB using: Apparent heat release model (Model1) and Combustion pressure method (Model-2) and the results are validated using modified Wiebe function. There was an increase in brake thermal efficiency by 5% compared to base fuel (E0) and the specific fuel consumption (sfc) for 2EW30TBA10 fuel sample is 290 g/KWh as compared to E10, which is 300 g/KWh and for Petrol (E0), sfc is 360 g/KWh. There was a reduction in CO and HC emission compared to base fuel (E0) and an increase in NOx emissions. The cyclic variations of experimental results are validated using a non-linear regression model.

Performance and Emissions of Jatropha-Palm Blended Biodiesel

This paper deals with performances and emissions of Jatropha-Palm blended biodiesel as fuel for 4-stroke single vertical cylinder diesel engine. Five fuel samples were tested; i) Diesel fuel supplied by Petronas (PDF); ii) 5% of blended Jatropha-Palm biodiesel and 95% Diesel fuel (B5JPB); iii) 10% of blended Jatropha-Palm biodiesel and 90% Diesel fuel (B10JPB); iv) 15% of blended Jatropha-Palm biodiesel and 85% Diesel fuel (B15JPB); and v) 20% of blended Jatropha-Palm biodiesel and 80% Diesel fuel (B20JPB). Engine performances (specific fuel consumption, brake thermal efficiency) and emissions (exhaust gas temperature and Nox emission) were analyzed and have been discussed in this study. All tests were carried out at varied load conditions which were 0.13, 0.15, 0.17, 0.19 and 0.21 kW. The results revealed that B10JPB blended showed better engine performances compared to its other blends and comparable performances compared to PDF. Comparable Nox emitted of all Jatropha-Palm fuel blended biodiesel fuel sample has been demonstrated to those PDF.