%0 Journal Article %T Assessment of the Performance and Exhaust Emission of a Diesel Engine Using Water Emulsion Fuel (WEF) in Different Engine Speed and Load Conditions %J Journal of Renewable Energy and Environment %I Materials and Energy Research Center (MERC) Iranian Association of Chemical Engineers (IAChE) %Z 2423-5547 %A Hoseini, Seyed Saeed %A Sobati, Mohammad Amin %D 2021 %\ 01/01/2021 %V 8 %N 1 %P 58-68 %! Assessment of the Performance and Exhaust Emission of a Diesel Engine Using Water Emulsion Fuel (WEF) in Different Engine Speed and Load Conditions %K Water emulsion fuel %K Engine Performance %K Exhaust emission %K Engine speed %K Engine load %R 10.30501/jree.2020.233709.1115 %X The performance characteristics and exhaust emission of a diesel engine using Water Emulsion Fuel (WEF) have been investigated under different engine speeds (1600 to 2400 rpm) and load conditions (25 to 100 %). The experiments were carried out on an air-cooled diesel engine of single cylinder using the WEF containing 5 % water, 2 % surfactant with Hydrophilic-Lipophilic Balance (HLB) of 6.8. The engine performance and exhaust emission using WEF were also compared with the Neat Diesel Fuel (NDF). According to the results, average reduction of 9.7 % in the engine torque and brake power was observed using WEF at all engine speeds. In addition, a 7.9 % increase in the Brake Specific Fuel Consumption (BSFC) and a 3.7 % increase in the Brake Thermal Efficiency (BTE) were observed for WEF in comparison with NDF in all loading conditions. In case of emission, significant lower hydrocarbon emission (i.e., 14.6 % on average) was observed for WEF comparing to NDF at all engine speeds. Moreover, a considerable reduction in the NOx emission (i.e., 31.1 % on average) was observed for the WEF comparing to the NDF in every engine load. In summary, the application of WEF leads to the reduction in the emission of different pollutants with a positive impact on the environment. %U https://www.jree.ir/article_120192_cf5e3a5bf5d6f924ececb031051de40d.pdf