结合水力发电利用太阳能烟囱技术强化海水淡化初探  

Seawater Desalination and Waterpower Integrated System with Solar Chimney

作　　者：朱丽[1] 王俊红 王一平[2] 杨智勇[2] 方振雷[2] 

机构地区：[1]天津大学建筑学院,天津300072 [2]天津大学化工学院,天津300072

出　　处：《天津大学学报》2006年第5期575-580,共6页Journal of Tianjin University(Science and Technology)

基　　金：国家青年教师基金资助项目(5110106)天津市科技攻关资助项目(05YFGZFF02800).

摘　　要：针对淡水缺乏和电力不足的问题,提出了一种新型的太阳能烟囱海水淡化和水力发电综合利用系统．以天津地区的气候条件为准,初步估算出此系统每平方米集热棚面积可年产1．7 kW·h的电量和0．74 t的淡水．在小型间壁冷凝实验系统中,对系统各部分的轴向温度场和实际冷凝水产量进行了测量,验证了综合系统淡水产量的估算结果．衰变因子被用来表征饱和湿热空气中不凝性气体对水蒸气间壁冷凝换热过程的影响,对气-汽间壁冷凝换热机理进行了初步探讨．实验和理论结果表明衰变因子是温度、冷气速和不凝性气体含量等变量的函数,并做了冷凝换热系统的初步设计．For the lack of freshwater and electric power, the integrated solar chimney system for waterpower and seawater desalination is put forward. According to the climate conditions of Tianjin, 1.7 kW · h electric power and 0.74 t freshwater can be obtained by 1 m2 area of the integrated system anually. In the small experimental system, the axial temperatures of different parts and the output of freshwater are measured to validate the output estimation of freshwater. The indirect condensation mechanism of vapor is investigated in the presence of noncondensable gas. The attenuation coefficient, which is the function of temperature, velocity and noncondensable gas content, is used to express the influence of the noncondensable gases in the process of indirect condensation of vapor. The heat exchanger is also preliminary designed.

关 键 词：太阳能烟囱 海水淡化 水力发电 间壁冷凝换热 衰变因子 

分 类 号：TK511[动力工程及工程热物理—热能工程]