Performance Evaluation of Single Stage Flash Evaporation Desalination System Coupled with Nanofluid-based Direct Absorption Solar Collector
A mathematical model of single stage flash evaporation desalination system with brine recirculation configuration (SSF-BR) which is coupled with nanofluid-based direct absorption solar collector is developed. This study shows the impact of various influencing parameters such as inlet temperature of feed seawater (Tf,), particle volume fraction (fv), top brine temperature (To) and height of the collector (H) on the system productivity which has been measured in terms of gained output ratio (GOR). The GOR is the ratio of enthalpy of distillate to the heat absorbed by the nanofluid which in this case is the seawater with nanoparticles of different materials mixed in it. For the fixed brine blow down temperature (Tb), GOR of the system can be increased by increasing the top brine temperature (To), which can be achieved by an optimum height of the collector (H), and particle volume fraction (fv), and high inlet temperature of the feed seawater. The GOR obtained in this study is less than 1 and it is found that maximum amount of distillate obtained from the system is approximately 0.87 (litres/hr) for the recycled brine flow rate of 21.6 (litres/hr) which is approximately same for both types of nanoparticles. The amount of distillate and also the system performance is little higher with copper (Cu) nanoparticles, as compared to aluminum (Al) nanoparticles.