Abstract

Three MED plants for 1.25 MGD were installed in St. Thomas and St. Croix by Israel Desalination Engineering. The Low Temperature MED plants made of horizontal aluminium tubes exceeded the acceptance criteria and continuously supply drinking water to the islands with purity of 16 ppm TDS. Since late 1981 the availability has exceeded 97% and the performance ratio is 12.4 or better. Annual average production was 1.3, 1.3 and 1.27 MGD. The most notable advantages of the MED plants are: 1. a. The easy start up and operation of the MED process and short period between start up and full capacity. 2. b. Specific Power Consumption does not change markedly when operating on partial load. 3. c. Low temperature operation results in nearly scale free plant and allows for the use of less expensive construction materials.

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