A literature review on some engineering issues of high temperature molten salt thermal energy storage systems

doi:10.3969/j.issn.2095-4239.2015.01.003

Abstract

Abstract: High temperature molten salt thermal energy storage unit has an irreplaceable role for solar thermal power generation for balancing energy supply and demand, and extending the working hours. It has become an indispensible sub-system for modern solar thermal power plants. Based on the project experience in installation and operation of a high temperature molten salt thermal energy storage unit containing a binary carbonate eutectic salt with a working temperature up to 850 ℃, this paper discusses some common engineering issues, including molten salt transportation pipe connections, anti-freezing/heat-tracing and thermal insulation of molten salt pipelines, salt charging / discharging, long-shaft molten salt pumps, and incident/accident prevention, etc.

Key words: molten salt, thermal storage, solar energy, thermal power, pipe conjunction, heat tracing, long-shaft pump, accident prevention

CLC Number:

TK513

GUO Xiaojuan, DING Zhan, Frank G F QIN, YANG Xiaoping, HUANG Simin, JIANG Runhua, MA Yuanqiong, YIN Huibin, ZUO Yuanzhi, YANG Minlin, YANG Xiaoxi. A literature review on some engineering issues of high temperature molten salt thermal energy storage systems[J]. Energy Storage Science and Technology, 2015, 4(1): 32-43.

References

[1] Zhang Zhimin（张智民）,Wang Hua（王华）,He Fang（何方）,Xin Jiayu（辛嘉余）. Exergy analysis of nonflame combustion technology using thermal cyclic carrier of molten salt[J] . Coal Conversion （煤炭转化）,2006,29（1）：89-94.
[2] Wikipedia. The free encyclopedia, Molten salt[EB/OL] . http://en.wikipedia.org/wiki/Molten_salt.
[3] Speidel P J,Kelly B D,Prairie M R,Pacheco J E,Gilbert R L,Reilly H E. Performance of the Solar Two central receiver power plant[C]// Odeillo ：The 9th International Symposium on Solar Thermal Concentrating Technologies,1998.
[4] Ge Zhiwei（葛志伟）,Ye Feng（叶锋）,Lasfargues M,Yang Jun（杨军）,Ding Yulong（丁玉龙）. Recent progress and prospective of medium and high temperatures thermal energy storage materials[J] . Energy Storage Science and Technology （储能科学与技术）,2013,2（6）：586-592.
[5] Wang Qi（汪琦）,Yu Hongxiao（俞红啸）,Zhang Huifen（张慧芬）. Design and development of the thermal and energy storage circulating system with molten salts for solar thermal power generation[J] . Chemical Equipment Technology （化工装备技术）,2014,35（1）：11-14.
[6] Zuo Yuanzhi（左远志）,Yang Xiaoxi（杨晓西）,Ding Jing（丁静）,Fan Hongbo（范洪波）. Effect of operational parameter on the heat transfer in the high-temperature thermocline thermal energy storage with molten salt materials[J] . Journal of Engineering Thermophysics （工程热物理学报）, 2012,33（5）：868-872.
[7] Wu Yuting（吴玉庭）,Ren Nan（任楠）,Ma Chongfang（马重芳）. Research and application of molten salts for sensible heat storage[J] . Energy Storage Science and Technology （储能科学与技术）,2013,2（6）：586-592.
[8] Wu Yuting（吴玉庭）,Ren Nan（任楠）,Ma Chongfang（马重芳）,Liu Bin（斌刘）. Independent thermal storage power station with molten salt：Technology and evaluation[J] . Energy Storage Science and Technology （储能科学与技术）,2014,3（3）：191-196.
[9] Brosseau D,Kolb G,Bradshaw B. Sandia thermal storage activities[C] // Colorado ：Trough Workshop NREL,2007.
[10] Pacheco J E. Final test and evaluation results from the solar two project[J] . Livermore CA ： Sandia National Laboratories ,2002,doi:10.2172/793226.
[11] Bradshaw R W,Dawson D B,Rosa W D,Gilbert R,Goods S H,Hale M J,Jacobs P,Jones S A,Kolb G J,Pacheco J E,Prairie M R,Reilly H E,Showalter S K,Vant-Hull L L. Final Test and Evaluation Results from the Solar Two Project[R]. Albuquerque：Sandia National Laboratories,United States Department of Energy,2002.
[12] Pacheco J E,Kolb W J. Comparison of an impedance heating system to mineral insulated heat trace for power tower applications[C]// Washington：1997 ASME International Solar Energy Conference,1997.
[13] Rafferty N R. IEEE 844-2000：Recommended practice for electrical impedance, induction, and skin effect heating of pipelines and vessels[C]// Wilmington：IEEE Transactions on Industry Applications,2002.
[14] Pacheco J E,Dunkin S R. Assessment of molten-salt solar central receiver freeze-up and recovery events[C]// San Antonio ： Proceedings of the 1996 ASME International Solar Energy Society Conference,1996.
[15] Kelly B D. Advanced thermal storage for central receivers with supercritical coolants[R]. U S：Abengoa Solar Inc.,2010.
[16] Brosseau D A,Hlava P F,Kelly M J. Testing thermocline filler materials and molten-salt heat transfer fluids for thermal energy storage systems used in parabolic trough solar power plants[R]. U S：Sandia National Laboratories,2004.
[17] He Xingnian（何悻年）. 太阳能热利用[M]. 合肥：中国科学技术大学出版社,2009.
[18] Barth D L,Pacheco J E,Kolb W J,Rush E E. Development of a high-temperature, long-shafted, molten-salt pump for power tower applications[J] . Transactions of the ASME ,2002,124（5）：170-175.
[19] Storage Tank at Solar Power Plant in Desert Explodes; Immediate Area Is Evacuated[N/OL] . Los Angeles Times,February 27, 1999.
[20] Herrmann U,Geyer M,Kearney D. Overview on thermal storage systems [EB/OL]. 2002. http://www.nrel.gov/csp/troughnet/pdfs/uh_ storage_ overview_ws030320.pdf.
[21] Marc Medrano,Antoni Gil,Ingrid Martorell, et al . State of the art on high-temperature thermal energy storage for power generation. Part 2—Case studies[J] . Renewable and Sustainable Energy Reviews ,2010,14：56-72.
[22] Marietta M. Molten salt safety study[R] . U S：Sandia National Laboratories Report,1980.
[23] Zhen Yang,Garimella S V. Cyclic operation of molten-salt thermal energy storage in thermoclines for solar power plants[J] . Applied Energy ,2013,103（3）：256-265.
[24] Kearney D,Kelly B,Herrmann U,Cable R,Pacheco J,Mahoney R,Price H,Blake D,Nava P,Potrovitza N. Engineering aspects of a molten salt heat transfer fluid in a troughsolar field[J] . Energy ,2004,29：861-870.
[25] Peng Qiang,Ding Jing,Wei Xiaolan,Yang Jianping,Yang Xiaoxi. The preparation and properties of multi-component molten salts [J] . Applied Energy ,2010,87（9）：2812-2817.
[26] Stéphanie Guillot,Abdessamad Faik,Aydar Rakhmatullin,Julien Lambert,Emmanuel Veron,Patrick Echegut,Catherine Bessada,Nicolas Calvet,Py X. Corrosion effects between molten salts and thermal storage material for concentrated solar power plants[J] . Applied Energy ,2012,94（6）：174-181.
[27] Wikipedia. List of Solar Thermal Power Stations[M/OL] . 2012. http://en.wikipedia.org/wiki/List_of_solar_thermal_ power_stations.