Effect of Compression Ratio on Performance of Single Cylinder Four Stroke Diesel Engine with Cotton Seed Oil Blends

Biodiesel in one of the several alternative fuels designed to extend the usefulness of petroleum, and the longevity and cleanliness of diesel engines. Cotton seed oil (CSO) is chosen as a potential biodiesel for the present investigations based on the availability in India. An experimental investigation is carried out to establish the performance characteristic of compression ignition engine while changing compression ratios (15: 1, 15.5: 1, 16: 1, 16.5: 1) of the engine while using Cotton Seed Oil blends. In the first phase we prepared biodiesel from cotton seed oil through transsesterification process. In the second phase, performance characteristic are studied using the stable fuel blends in a single cylinder four stroke Variable Compression Ratio, water cooled, direct injection, 1500rpm, 5 hp, 3.5kW diesel engine which is coupled to a 80V, 2.4 kg-m torque eddy current dynamometer which is used for loading the engine. The cotton seed oil blends B10, B20 and B30 are used as fuel. The performance test results shown that the Mechanical efficiency, Brake Thermal efficiency and Specific Fuel Consumption of CSO are compared with Diesel.