The calculation and analysis of glass-to-metal sealing stress in solar absorber tube

	The calculation and analysis of glass-to-metal sealing stress in solar absorber tube
	Lei DQ(雷东强)
刊名	Renewable Energy
	2009
卷号	35 期号:2 页码:405
通讯作者	雷东强
中文摘要	The failure or degradation of solar absorber tubes is the single largest cost factor for current parabolic trough solar power plant. The main failure reason is that there are residual stresses in the glass-to-metal joint which are generated during the cooling process of sealing. According to the thin shell theory and thermal stress theory, this paper presents the analytic solution for the glass-to-metal sealing residual stress. It also analyses how the thickness of glass tube, thickness of metal ring, and thermal expansion coefficient affect the residual stress distribution. In order to verify the calculation results, the photoelastic technique is used to measure the residual stress and the tensile test is used to obtain the point of the most dangerous stress and the tensile strength for the sealed specimens. It can be concluded that the maximum tensile stress happens at some distance near the sealing interface on the outer surface of glass tube. The seal strength increases when the thickness of the glass tube is increased. The analytic solution is proved feasible to analyze the residual stress of glass-to-metal seals in solar absorber tubes.
学科主题	传热学
收录类别	1
公开日期	2010-09-30
附注	The failure or degradation of solar absorber tubes is the single largest cost factor for current parabolic trough solar power plant. The main failure reason is that there are residual stresses in the glass-to-metal joint which are generated during the cooling process of sealing. According to the thin shell theory and thermal stress theory, this paper presents the analytic solution for the glass-to-metal sealing residual stress. It also analyses how the thickness of glass tube, thickness of metal ring, and thermal expansion coefficient affect the residual stress distribution. In order to verify the calculation results, the photoelastic technique is used to measure the residual stress and the tensile test is used to obtain the point of the most dangerous stress and the tensile strength for the sealed specimens. It can be concluded that the maximum tensile stress happens at some distance near the sealing interface on the outer surface of glass tube. The seal strength increases when the thickness of the glass tube is increased. The analytic solution is proved feasible to analyze the residual stress of glass-to-metal seals in solar absorber tubes.
内容类型	期刊论文
源URL	[http://ir.iee.ac.cn/handle/311042/1754]
专题	电工研究所_太阳能热发电技术研究组_太阳能热发电技术研究组_期刊论文
推荐引用方式 GB/T 7714	Lei DQ. The calculation and analysis of glass-to-metal sealing stress in solar absorber tube[J]. Renewable Energy,2009,35(2):405.
APA	雷东强.(2009).The calculation and analysis of glass-to-metal sealing stress in solar absorber tube.Renewable Energy,35(2),405.
MLA	雷东强."The calculation and analysis of glass-to-metal sealing stress in solar absorber tube".Renewable Energy 35.2(2009):405.