Performance Assessment and Thermodynamic Analysis of Different Organic Rankine Cycle (ORC) Configurations for IC Engine Waste Heat Recovery
摘要
Three different Organic Rankine Cycle (ORC) configurations have been studied to recover power from six-cylinder turbocharged diesel engine waste stream. Multiple temperature profiles of diesel engine waste streams make it convenient to study different ORC configurations from the integration to extract power. A dual loop ORC operates with MM and cyclopentane as working fluids for high temperature engine exhaust waste heat recovery and R-134a has been used as working fluid for low temperature heat recovery from jacket cooling water. This configuration generates a maximum total power of 103.551 kW for Cyclopentane at Pr = 0.9 for exhaust gas exit temperature of 373.15 K. A PH HT-LT-ORC preheats the high temperature feed fluid using jacket cooling water and expander exhaust is used for LT-loop power recovery; this configuration produces a maximum power output of 91.22 kW. MM based preheated ORC (PH-ORC) with R-245fa LT-Loop has been studied to understand the power recovery potential. This configuration generates a power output of 99.12 kW. The exergy efficiency of DL-ORC for both the working fluids has been calculated as it generates the highest power compared to other schemes.