Since in the last century, fossil fuel resources are being depleted at alarming rate due to rapidrnindustrialization. Combustion of large quantity of fuel resulted in emission of pollutant andrnCarbon dioxide and caused greenhouse effect that caused global warming. The remedy ofrnglobal warming is to substitute fossil fuels by renewable energy. Among the renewablernenergy sources, biodiesel is a fuel that can substitute diesel fuel. Biodiesel is produced byrntransesterifiction of plant oils. Jatropha is one source of biodiesel which is non-edible byrnhuman being and animals. Instead of using edible vegetable oils, use of jatropha oil does notrnendanger food security. rn The generation of biodiesels needs reactors in which the chemical reaction orrntransesterifiction takes place. When biodiesel is produced from jatropha seed during oilrnextraction, jatropha cake is obtained as byproduct. The main objective of this thesis is torndesign appropriate reactor for Biodiesel which is heated by steam from jatropha cake boilerrnso that the process will be self-sufficient in thermal energy use. The design of jacketedrnreactor is done by analytical and computational methods through Ansys fluent release 17.2rnto assure proper mixing and uniform reaction temperature is achieved. The steam jacketrnaround the reactor is insulated to reduce heat losses. rn The jacketed reactor is designed for steam annular area as heat exchanger without fluidrncontact. The temperature of the jatropha oil is raised from 30 to 80 degree Celsius byrntransferring of heat energy from steam boiler which is the maximum temperature. This heatrnis required to reduce the retention time of jatropha oil during reaction with ethanol oil tornproduce biodiesel. No heat loss is happened at the conical shape of the reactor and heat isrntransferred from the wall of the reactor to the batch fluid to raise the temperature of the batchrnfluid from 303 to 353K for 500s heating process by using 412.16kJ capacity of jatropha cakernboiler which is used 75 kg of jatropha cake. From this capacity of boiler, 269.81kJ heatrnenergy is transferred by convection and conduction heat transfer system to heat 75kg ofrnbatch reactant in the reactor .The heating time of jatropha oil through convection heatrntransfer through reactor is 500s