Abstract
A study was made on the designing of an apparatus for the MSF process in connection with the national research and development project on desalination.
A simple and similar model was employed for this study, and on the basis of this model, such parameters as the number of evaporating stages, the length of each stage, the velocity of brine flowing in tubes, and the ratio of brine concentration were optimized in full consideration of the production cost of water. A sensitivity analysis made in this study indicated quantitatively that major parameters to the production cost of water were the cost of heat-transferring tubes and the cost of steam, and that the most sensitive parameter to the performance ratio was the number of evaporating stages.
In addition, a more detailed model was used for this study, and a computer program was prepared to again stage-by-stage variables by marking a heat transferring area constant for each stage. A sensitivity analysis was also made on the number of stages, fouling factors, the temperature of exhausted brine, the temperature of sea water, and concentration ratios. As the result, the temperature of sea water was found the most sensitive.
