Performance Analysis on Liquid-vapor Jet Ejector Cycle for Thermal Energy Conversion System

Abstract

To handle the increasing energy demand and prevent the global warming problem, the importance of the renewable energy is continuously growing. Above all, Thermal energy conversion is one of the most prospective methods to generate the clean energy. This system uses the temperature difference between hot waste water from the nuclear power plant and cold deep sea water. Refrigerant-245fa is chosen for the working fluid and drives the turbine. The system has strength on high rate of operation. However, comparing to other power generating methods, the system has relatively low system efficiency. Ejector, which is utilized in diverse industries, is main component of the system. It increases the energy generation by enlarging the pressure difference of the turbine. This component is made up with three parts called Motive, Suction and Discharge part. Motive part is connected to the motive pump which is shooting into the condensed fluid through the narrow nozzle. On this study, thermal energy conversion cycle with vapor-liquid mixture jet ejector is suggested. The working fluid passing through the condenser is divided at the distributor. Each stream is flowed into the evaporator and themotive part of the ejector. There is another distributor next to the evaporator that deal out the vapor to the motive flow. The remaining is flowed into the turbine and generates the electricity