International Science and Technology Journal

Desalination processes are considered an essential solution to meet the water scarcity in Libya. Among the desalination techniques, the multistage flash (MSF) desalination technique has a significant contribution to water budget in many regions around the world. This study aims with modeling and simulation of novel configuration of MSF process to reduce the production cost by increasing the performance ratio using the software constructed by author. The process is based on the modification of existing multi stage flash desalination plant with brine recycles MSF-BR, north Benghazi plant was used as case study. The modification involves removal of the heat rejection section and the addition of a mixing tank for the feed stream and the unevaporated brine recycle. This eliminates the amount of energy rejected in the cooling seawater stream and reduces the amount of energy rejected in the brine blowdown stream. Analysis of the MSF-M process shows an increase in the thermal performance ratio by a factor of 2-3 over conventional MSF.