Abstract
A new distillation/concentration system using heat pump is originally proposed and confirmed the actual performance of this system by using a small-scaled glass-made apparatus. The experimental results are reported here. We observed that water strongly boils even at temperatures below 40℃ by decompressing inside of the apparatus. The efficiency of distillation is superior to earlier studies. The amount of distilled water increases with decreasing temperature of cooling water, while the efficiency becomes lower. Heat balance calculation taken in consideration of temperatures of heat-source and -sink with the ambient temperature would be required as a next problem for operating it under optimum conditions.
