Plasma Vacuum-Arc Treatment Technology for the Metal Pipe Surfaces of Solar Thermal Power Plants

IF 1.204 Q3 Energy
V. N. Arustamov, M. V. Kremkov, B. R. Kakhramonov, I. Kh. Khudaykulov, Kh. B. Ashurov
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Abstract

Currently, there is widespread interest in developing efficient technologies for harnessing solar energy, both in direct conversion of solar energy into electrical energy and in solar thermal power plants (STPPs). STPPs are sustainable sources of electricity due to the accumulation of heat in a heat carrier, which can be water, molten salt, or oil. The key to increasing the attractiveness of this technology lies in replacing the method of directly generating steam by heating water with solar radiation, with a receiver method using an intermediate heat transfer fluid. The technology of transferring heat obtained from solar radiation through liquid salt (a mixture of potassium nitrate and sodium nitrate, among others) imposes high demands on the pipes of this system that carry the heat transfer fluid, particularly regarding their corrosion resistance and service life. Using pipes made of ordinary steel grades with a special anti-corrosion coating applied to their inner surface can significantly reduce costs and increase the service life of the pipes, as well as the efficiency and reliability of STPPs. The study demonstrates that the method of comprehensive plasma vacuum arc treatment of the inner surface of metal pipes of various configurations, and the application of special coatings, ensures high anti-corrosion protection. For instance, applying a thin-layer coating of austenitic steel with a high chromium content (up to 28%) to samples of martensitic steel pipes resulted in 100% retention of the original sprayed material composition. Thus, the mechanical strength of the base material of the metal pipes in salt STPPs is combined with the high anti-corrosion properties of the applied material. Recommendations are provided for using plasma vacuum arc technology to ensure high operational properties of the circulating pipe systems in salt STPPs.

Abstract Image

Abstract Image

太阳能热电厂金属管道表面的等离子真空-电弧处理技术
摘要目前,人们普遍关注开发高效的太阳能利用技术,包括将太阳能直接转化为电能和太阳能热发电厂(STPPs)。太阳能热电站是一种可持续的电力来源,其原理是将热量积聚在载热体中,载热体可以是水、熔盐或油。要提高这项技术的吸引力,关键在于用使用中间传热流体的接收器方法取代通过太阳辐射加热水直接产生蒸汽的方法。通过液态盐(硝酸钾和硝酸钠等的混合物)传递从太阳辐射中获得的热量的技术对该系统中输送导热液体的管道提出了很高的要求,尤其是在耐腐蚀性和使用寿命方面。使用内表面涂有特殊防腐涂层的普通钢管可以大大降低成本,延长管道的使用寿命,提高 STPP 的效率和可靠性。研究表明,对各种结构的金属管道内表面进行综合等离子真空电弧处理并涂上特殊涂层的方法可确保较高的防腐保护。例如,在马氏体钢管样品上喷涂一层含铬量高(高达 28%)的奥氏体钢薄层涂层后,原始喷涂材料成分的保留率达到 100%。因此,盐基 STPP 中金属管道基体材料的机械强度与喷涂材料的高防腐性能相结合。建议使用等离子真空电弧技术确保盐业 STPP 循环管道系统的高运行性能。
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来源期刊
Applied Solar Energy
Applied Solar Energy Energy-Renewable Energy, Sustainability and the Environment
CiteScore
2.50
自引率
0.00%
发文量
0
期刊介绍: Applied Solar Energy  is an international peer reviewed journal covers various topics of research and development studies on solar energy conversion and use: photovoltaics, thermophotovoltaics, water heaters, passive solar heating systems, drying of agricultural production, water desalination, solar radiation condensers, operation of Big Solar Oven, combined use of solar energy and traditional energy sources, new semiconductors for solar cells and thermophotovoltaic system photocells, engines for autonomous solar stations.
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