Abstract :
Based on the mechanism of falling film evaporation condensation, a new four-stage distillation unit with triple-effect regeneration has
been designed, constructed and field tested. The seawater desalination system is driven by 80 m2 all-glass vacuum tube solar collection
system with an additional 1 kW wind power system to provide electricity for pumps. The field testing and monitoring of the system had
been carried out under the real weather condition for 2 years. The results show that the water production of the system for per unit of
solar collector area could reach up to more than 12 kg/m2/day under the fine weather conditions. Water production of the system was
stable in long period and the annual production could reach to 250 tons in northern China. The economic performance of the system is
also discussed. The cost of water production is estimated approximately 4.6 Dollar/ton for the 15-year service life.
Crown Copyright 2011 Published by Elsevier Ltd. All rights reserved.
