Influence of water mass flow rate and water salinity on specific energy consumption and aquadest production using throttling process method

Water is a very important substance in human life. The type of water that humans need is clean water. However, 97.7% of the water available on earth contains salt, so it is not suitable for use. Humans have made many efforts to convert seawater into freshwater by various methods, one of which is the desalination method to increase water resources and improve water quality. In this study, there are two methods used; experimental and simulation method. The experimental method uses experimental devices to prove that this system can be applied to the steam power plant and to see the effect of water mass flow and water salinity on specific aquades production, the experimental method only includes the throttling process and not integrated to steam power plant cycle. The simulation method uses theoretical calculations as a system that has been integrated into the power plant to obtain the value of specific energy consumption. Briefly, hot water waste from a power plant condenser can be used as a water source by using the desalination method. Thermal method and throttling process, hot water waste from the condenser can reach the saturation pressure and temperature. The throttling process is a method to limit the water flow to reduce pressure. The simulation method it can be proven that the pinch point and percentage of water waste are affecting Specific Energy Consumption (SEC). From the simulation results, the best SEC data obtained at 7.5C pinch points and 99% wastewater percent with SEC value of-1691.65 kJ/kg. An experimental method was also conducted to prove that this throttling process can be implemented. This experimental method produces aquades that directly proportional to mass flow and inversely proportional to the salt concentration. The best aquades production from the experimental method is 32 ml/min, which is obtained at temperature 130C and mass flow 600 ml/min.