太阳能真空管对流换热的模拟和实验研究  

Simulation and Experimental Analysis of Convection in Solar Evacuated Tube

作　　者：张涛[1] 韩吉田[1] 闫素英[2] 于泽庭[1] 岳秀艳[1] 

机构地区：[1]山东大学能源与动力工程学院,济南250061 [2]内蒙古工业大学能源与动力工程学院,呼和浩特010051

出　　处：《工程热物理学报》2015年第9期2027-2031,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.51376110);教育部博士点基金项目(No.2013013110006);国家基金重大国际(地区)合作研究项目(No.61320106011)

摘　　要：在对太阳能Kalina循环机理研究的基础上,针对对流换热边界条件,建立单管太阳能热水器对流换热过程的数学模型,并对该模型进行了通过实验验证,实验采用φ47×1500和φ58×1800两种真空管,分析了各种因素对对流换热效果的影响。结果表明:该数学模型能够较好地解释单管太阳能热水器对流换热过程;安装角度、管径和管长、水箱直径,是否加装导流板和反光板均对对流换热过程有不同程度的影响。通过对单管太阳能热水器的场协同性可视化分析,确定加装反光板和导流板的φ58×1800真空管为首选。A mathematical model of convective heat transfer in single tube solar water heater was developed and verified with experimental results based on the mechanism analysis of solar Kalina cycle and the boundary conditions of convective heat transfer. The influence factors of convective heat transfer were studied in the experiment with φ47×1500 and φ58× 1800 evacuated tubes. The results show that the mathematical model can be used to model the process of convective heat transfer in single tube solar water heater. The effect of installation angle, tube diameter and length, water tank diameter, guide plate and reflector on the convective heat transfer process is numerical determined. The collaborative visualization study on single tube solar water heater indicates that φ58×1800 evacuated tube with reflector and guide plate is a better option.

关 键 词：太阳能Kalina循环 单管太阳能热水器 对流换热 影响因素 场协同原理 

分 类 号：TK515[动力工程及工程热物理—热能工程]