Development of a Correlation for the Estimation of the Higher Calorific Value of Diesel, Based on Its Kinematic Viscosity and Density

Diesel is extensively used as a fuel in prime movers, boilers and other power generation plants. The higher calorific value of diesel gives a measure of the effective chemical energy stored in a unit amount of fuel. The higher calorific value is required for the efficiency calculation of a machine and hence it directly affects the estimation of the gross turnover of a power plant. Traditionally the higher calorific value of diesel is determined by means of a bomb calorimeter; however, this procedure is time consuming and requires expensive, specialized equipment and oxygen gas. In this paper the authors have developed a unified correlation relating the higher calorific value of diesel with its density and kinematic viscosity both. Kinematic viscosity and density can be measured easily and quickly using standard laboratory instruments. Thus, developing the correlation has quickened the process of the estimation of the higher calorific value of diesel, and correlating two physical properties density and kinematic viscosity has made the estimation more accurate with a correlation coefficient of 0.985444 and a coefficient of determination of 0.9711 with a standard error of 1.012414 J/kg only.