Analisis Eksergi pada Aplikasi Pemanfaatan Panas Buang Melalui Unit Pendinginan Mesin Diesel Untuk Siklus Rankine Organik

Abstract

Rapid population growth has resulted in fossil energy being gradually depleted and environmental pollution getting worse. So far, burning fossil fuels already produces about 40% of global carbon dioxide (CO2) emissions, which are considered a major source of greenhouse gases. Internal Combustion Engine (ICE) has become the main power source for cars, trucks, locomotives, and ships. In ordinary diesel engines, less than 45% of the fuel energy can be converted into useful work output from the crankshaft, and the remaining energy is largely lost through exhaust gases and jacket water. One way that can be done is to utilize the waste from the internal combustion engine (ICE). This method uses the Organic Rankine Cycle (ORC) system by utilizing exhaust heat from the diesel engine from the engine coolant to the evaporator. In this research, focused study on exergy analysis of each component in the ORC sistem integrated in the diesel engine cooling unit which was simulated using Aspen Plus software. The analytical method used in this study is the exergy method with variations in ambient temperatur 20 ℃ - 28 ℃ by using the working fluid R141B. The results showed that the highest extreme digestion was obtained in condenser and evaporator components, while the lowest occurred in pumps and turbines. As well as the efficiency of exergy increases as the environmental temperature rises at 20 °C, which is 7.53 kW to 7.73 kW at a temperature of 28 °C.