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FROM ARCHAEA TO THE ATMOSPHERE: INTEGRATING MICROBIAL, ISOTOPIC AND LANDSCAPE-SCALE OBSERVATIONS TO QUANTIFY METHANE EMISSIONS FROM GLOBAL HIGH-LATITUDE ECOSYSTEMS
项目编号NNX17AK10G S003
RUTH VARNER
开始日期2017-04-20
结束日期2020-04-19
英文摘要Corrosion and/or Erosion Resistance in Supercritical Carbon Dioxide Based Power Cycle Applications—Altex Technologies Corporation, 244 Sobrante Way, Sunnyvale, CA 94086-4807John Kelly, Principal Investigator, john@altextech.comAlexander Kelly, Business Official, alex@altextech.comAmount:  $998,158  Advanced, highly efficient and compact supercritical carbon dioxide power plants are being developed to replace Rankine based steam cycles, in industrial and utility applications. As well as being more efficient and compact, these power plants are lower in cost than current power systems. However, heat exchangers for these plants represent approximately one third of the plant cost. Under the high temperatures of operation, corrosion and erosion can degrade these heat exchangers and drive up maintenance and replacement costs, which reduces the commercial implementation of this promising power system technology. The proposer has identified an innovative technology that leverages the proposer’s current heat exchanger bonding process, to improve the heat exchanger surface characteristics that will significantly increase corrosion resistance. Using a one step process, heat exchanger corrosion resistance can be improved, at low cost. Furthermore, the base structural strength of the heat exchanger will remain unchanged. Lastly, the process is applicable to moderate temperature waste heat applications, as well as higher temperature fossil, nuclear and concentrated solar power systems. Under Phase I, the proposer prepared and tested coupons, prepared from intermediate and high temperature heat exchanger base materials. Using the special surface coating, the corrosion resistance of a base stainless steel material was increased by over an order of magnitude. Compared to well proven corrosion resistant alloys, the special coating was found to be as effective in resisting supercritical carbon dioxide corrosion as high nickel and chrome containing alloys that are approximately four times the cost of the base stainless steel material. The economic analysis showed that the cost of the special coating would reduce material costs by 50 percent, versus high nickel content alloys. Under the Phase II project, the surface coating process that was shown to be feasible in Phase I, will be further developed and more extensively tested, to prove the corrosion resistance potential of the approach.  Also, the method will be applied to a prototype scale heat exchanger, and tested for integrity, to prove the benefits of the approach in a practical high pressure and temperature recuperator that simulates the features and manufacturing processes for a full scale recuperator. Commercial Applications and Other Benefits: The proposed concept applies to waste heat, fossil, nuclear and concentrating solar energy driven supercritical carbon dioxide power plants, of industrial and utility scales. The concept will improve the durability and reduce the maintenance of heat exchangers that represent one third the cost of these power plants. Given the lower cost of the heat exchangers built with this process, the power industry could save in the range of $12 billion in capital cost, by using this technology. 
学科分类1107 - 航空航天工程;11 - 工程与技术
资助机构US-NASA
国家US
语种英语
文献类型项目
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/73544
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GB/T 7714		 RUTH VARNER.FROM ARCHAEA TO THE ATMOSPHERE: INTEGRATING MICROBIAL, ISOTOPIC AND LANDSCAPE-SCALE OBSERVATIONS TO QUANTIFY METHANE EMISSIONS FROM GLOBAL HIGH-LATITUDE ECOSYSTEMS.2017.
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