Dr. Zehui ChangProfessor, Inner Mongolia University of Technology, China
Speech Title: Investigation and Application of A Multi-effect Vertical Concentric Tubular Solar Seawater Distillation Device
Abstract: Research shows that low efficiency and high cost have become the biggest obstacles for solar sea water desalination technology. A novel multi-effect vertical concentric tubular solar seawater distillation device is introduced and constructed in present work. The device consists of several closely spaced concentric stainless-steel pipes, in which the feed sea water gets preheated by hot brine water to guarantee the evaporation efficiency. Apart from this, the latent heat of vapor condensation in the multi-effect mode is re-utilized successful, and result in an increasing total yield. The total fresh water production and the GOR for the four-effect mode can reach 1.04 kg/h and 3.36 at the heat input of 200 W. The fresh water price and the payback period of the device are the most important economic factors for application of any particular desalination technology. The cost of water production is about 8.6 $/ton, thus, the payback period of the device is 5 just years, which implies an excellent application prospects for single family use to rural, arid and remote communities.