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International Heat Transfer Conference 16

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

HEAT AND MASS TRANSFER PERFORMANCE RESEARCH ON MULTIEFFECT VERTICAL TUBULAR SOLAR STILLS WITH GRAVITY FEED FOR SINGLE FAMILY USE

ZeHui Chang
College of Energy and power engineering, Inner Mongolia University of Technology, Hohhot 010051, China

Yang Liu
College of Energy and power engineering, Inner Mongolia University of Technology, Hohhot 010051, China

Jianye Li
College of Energy and power engineering, Inner Mongolia University of Technology, Hohhot 010051, China

Wenlong Li
College of Energy and power engineering, Inner Mongolia University of Technology, Hohhot 010051, China

HongFei Zheng
School of Mechanical engineering, Beijing Institute of Technology, Beijing 100081, China

DOI: 10.1615/IHTC16.nee.024137
pages 7711-7729


KEY WORDS: Solar desalination, brackish water, tubular, double-effect, economic estimation

Abstract

Solar brackish water desalination technology has been the preferred choice of method for providing fresh water without CO2 emission especially in arid and semi-arid with abundance sunshine. However, most of the present commercial solar desalination systems are utilized more economical based on large capacities. Furthermore, methods for increasing the yield rate of solar brackish water desalination system are often costly. Therefore, this paper presented a novel inflatable vertical tubular solar brackish water desalination system consisting of several closely spaced vertical concentric pipes. The productivity and thermal efficiency of the device for two operational modes (e.g., single-, double-effect) were tested and compared indoors at different operational conditions. The results indicate that the fresh water production for the double-effect device can reach 695.29 g/h at a heating temperature of 80 °C. The Gain Output Ratio of the device for the single-effect and double-effect modes can reach about 0.78 and 1.59 at the heat input of 200W. The performance of the device with different feed water temperature was investigated, respectively. In addition, the present investigation is presented an approach to predict the theory yield based on the internal heat and mass transfer mechanism. An economic estimation of the designed double-effect vertical tubular solar brackish water desalination device was also made and the production cost of water is about 6.0 $/ton, which means that this device is suitable for remote regions, e.g. the north and the west of China.

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