Exergy Analysis of Solar Desalination System on Dynamic Parameters

Abstract

From three units of flash chamber, evaporator, condenser in solar desalination system, the size of exergy efficiency and the Distribution of exergy loss rate is calculated using experimental data and grey box model. The results show that the exergy efficiency change of system is very small on dynamic parameters, exergy efficiency of system is in low level. The exergy efficiency change of evaporator is the larger. It rises with the decrease of flash evaporation pressure and reduces with the decrease of distillation pressure, also improve with the elevation of highest seawater temperature and feed water concentration. The exergy loss rate of evaporation is a part of the main, to achieve 73.78%. The exergy loss rate of flash chamber and evaporation is on the most sensitive of flash evaporation pressure Keywords-desalination; solar energy; exergy analysis; dynamic parameterI.