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论文类型：期刊论文

发表时间：2012-01-01

发表刊物：DESALINATION AND WATER TREATMENT

收录刊物：SCIE

卷号：50

期号：1-3

页面范围：310-316

ISSN号：1944-3994

关键字：Heat transfer coefficient; Horizontal-tubes falling film evaporation; Desalination; Spray density

摘要：The horizontal-tube falling film evaporation is a widely adopted technique in multiple-effect distillation desalination plant. It has a high heat transfer coefficient under quite small temperature difference. In this paper, an experimental equipment for horizontal-tube falling film evaporation was set up. Experiments were carried out to show how the heat transfer coefficient is affected by different parameters including heat flux, circumference direction of tubes, spray density, evaporation temperature, and experimental fluid. Results indicate that the heat transfer coefficient decreases after a little increase with growth of spray density. The heat transfer coefficient decreases along the tube circumference, but at the bottom of the tube, it shows increasing trend. In addition, a simple comparison between seawater and fresh water in heat transfer coefficient is also provided.