A review on performance, emission and combustion characteristics of a diesel engine fuelled with various vegetable oil

In the present scenario, world energy consumption is increasing rapidly every year because of the increasing trend of modernization and industrialization. Crude oil is the major source for producing energy, results in the degradation of the environment due to fossil fuel combustion. Moreover, the combustion products like carbon di-oxide (CO2), sulphur di-oxide (SO2), and nitrogen oxide (NOX) causes global warming.Crude oil depletes every year, to satisfy the energy demands, the crude oil is imported. The environmental problems caused by the indiscriminate use and scarcity of petroleum are the major factor to explore renewable energy resources. The idea of vegetable oil as a fuel to run diesel engines has been on the world stage over a century ago. Vegetable oil is an alternative fuel as a source of energy has been receiving great attention among the researchers because of its renewability, biodegradability, non-toxic and better quality of exhaust gas emissions.A lot of edible and inedible vegetable oils which canbe exploited for substitute fuel as diesel fuel, i.e., jatropha, karanja, rubber seed, cottonseed, palm oil, sun flower oil, rape seed oiland neemoils etc., has been selected and discussed the performance, combustion and emission characteristics of diesel engine under the variousworking conditions

A review on performance, emission and combustion characteristics of a diesel engine fuelled with various vegetable oil

225-234In the present scenario, world energy consumption is increasing rapidly every year because of the increasing trend of modernization and industrialization. Crude oil is the major source for producing energy, results in the degradation of the environment due to fossil fuel combustion. Moreover, the combustion products like carbon di-oxide (CO2), sulphur di-oxide (SO2), and nitrogen oxide (NOX) causes global warming.Crude oil depletes every year, to satisfy the energy demands, the crude oil is imported. The environmental problems caused by the indiscriminate use and scarcity of petroleum are the major factor to explore renewable energy resources. The idea of vegetable oil as a fuel to run diesel engines has been on the world stage over a century ago. Vegetable oil is an alternative fuel as a source of energy has been receiving great attention among the researchers because of its renewability, biodegradability, non-toxic and better quality of exhaust gas emissions.A lot of edible and inedible vegetable oils which canbe exploited for substitute fuel as diesel fuel, i.e., jatropha, karanja, rubber seed, cottonseed, palm oil, sun flower oil, rape seed oiland neemoils etc., has been selected and discussed the performance, combustion and emission characteristics of diesel engine under the variousworking conditions

Dry sliding wear behaviour of Industrial semi-crystalline and crystalline polymers

Abstract: At present, polymers are used in many static and dynamic industrial applications such as bushes, gears, bearings, rollers, timing screws and washers having replaced traditional materials like steel brass, bronze, copper and aluminum which undergo wear and tear. The present investigation was made to study the adhesive wear characteristics of semi-crystalline polyurethane polymer and crystalline polyacetal (Polyoxymethylene-POM) polymer. Polymers considered for this study are potential materials for rollers in hybrid chains in food processing industry and medical equipments. The wear tests were performed under dry conditions using a pinon-disc (ASTM G99) arrangement against a mild steel disc (HRB 67) at room temperature under various loads (60, 80,100N) and sliding speeds (1.8, 2.3, 2.8 m/s). Cylindrical shaped polymers of 25 mm diameter were used for the wear tests. Polyacetal was observed to have the lesser wear rate and coefficient of friction irrespective of load and speed because of its crystalline nature. Polyurethane exhibits higher frictional coefficient at higher sliding velocity