This study aims at obtaining vacuum aging mechanism in the annulus of the receiver. Simulating the parabolic trough receiver operation environment, the receivers are heat-treated at 400 ℃ and 450 ℃ to get the variative regulation of the vacuum. The initial vacuum level of the receiver after the degassing process is 4.7×10-4 Pa at room temperature. After 400 cycles at 400 ℃ and 450 ℃, the pressure of the receiver is 5×10-3 Pa and 6×10-2 Pa, respectively. At room temperature, when the normal emission ratio of the absorption coating is 0.08 and the vacuum degree is 10-3 Pa, the heat loss of the receiver tube is 216 W/m at 400 ℃, showing good thermal performance. The life time of the receiver is about 25 years according to the accelerated aging experiment.
Key words
solar energy /
parabolic trough receiver /
vacuum property /
aging /
heat loss
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References
[1] 胡其颖. 太阳能热发电技术的进展及现状[J]. 能源技术, 2005, 26(5): 200-207.
HU Q Y.History and present situation on generate electricity technical of solar heat[J]. Energy technology, 2005, 26(5): 200-207.
[2] RIFFELMANN K J, BOHNER M, FEND T.Development and test of an equipment to replace broken glass envelop of receiver tubes in parabolic trough collectors[C]//Proceedings of ISES Solar World Congress, Jerusalem, Israel, 1999, 3: 394-399.
[3] JIAN L, ZHANG Z F, LI J B, et al.Vacuum reliability analysis of parabolic trough receiver[J]. Solar energy materials and solar cells, 2012, 105: 302-308.
[4] PRICE H, LUPEFERT E, KEARNEY D, et al.Advances in parabolic Trough solar power technology[J]. Journal of solar energy engineering, 2002, 124(2): 109-125.
[5] PRICE H, GUMMO C, HALE M J, et al.Developments in high temperature parabolic trough receiver technology[C]//Proceedings of the 2004 International Solar Energy Conference, Portland, OR, USA, 2004: 659-667.
[6] 王军, 龚广杰, 谢启辉, 等. 新型高温真空集热管端部热损失的实验研究与分析[J]. 太阳能学报, 2010, 31(11):1434-1439.
WANG J, GONG G J, XIE Q H, et al.Experimental study and analysis on end heat loss of a new high temperature vacuum solar receiver[J]. Acta energiae solaris sinica, 2010, 31(11): 1434-1439.
[7] 龚广杰, 王军, 黄鑫炎, 等. 槽式太阳能真空集热管的热损失研究[J]. 太阳能学报, 2011, 32(4): 517-522.
GONG G J, WANG J, HUANG X Y, et al.Heat loss of parabolic trough evacuated tubular collector[J]. Acta energiae solaris sinica, 2011, 32(4): 517-522.
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