Superadiabatic Combustion with Counterflow Heat Exchange

逆流热交换超绝热燃烧

• 批准号: 0552640
• 负责人: Janet Ellzey
• 金额: --
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-04-01 至 2010-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0552640&HistoricalAwards=false
• 关键词: Superadiabatic; Combustion; Counterflow; Heat; Exchange

Award AbstractProposal Number: CTS- 0552640Principal Investigator: Ellzey, Janet L.Institution: University of Texas AustinProposal Title: Superadiabatic Combustion with Counterflow Heat Exchange The hydrogen fuel cell is a promising technology due to its environmentally clean qualities and high efficiencies. While hydrogen does not occur naturally, it constitutes the main building block of hydrocarbon fuels such as natural gas, petroleum derivatives, or ethanol. The process of stripping hydrogen from a hydrocarbon fuel is often referred to as reforming and the resulting gas consisting of carbon dioxide, carbon monoxide, hydrogen, and other species is called a syngas. The syngas can be used as an additive to a conventional hydrocarbon fuel or be purified and used as a fuel in fuel cells. In this project, a new technique for producing a syngas from a hydrocarbon fuel will be investigated. The intellectual merit lies in developing a new, more robust means of reforming hydrocarbon fuels. Conventional technologies for reforming often use catalysts which have restrictions on inlet temperature, pressure, and mixture quality for optimum performance. In the proposed project, the fuel reforming process is based on the concept of superadiabatic combustion, where heat is recirculated from the combustion zone upstream to the unburned mixture. The elevated, or superadiabatic, temperatures are sufficient to promote conversion of very rich hydrocarbon/air mixtures, which lie outside the normal flammability limits,. The proposed design consists of a counterflow heat exchanger in which heat from the hot products in one channel is transferred to the cold incoming mixture in the neighboring channel. This design has the potential to produce large flow rates of syngas with a high hydrogen content at steady state operation.The proposed project will have broader impacts beyond the research results. The PI is committed to developing a strong U.S. workforce and has an excellent record of recruiting U.S. citizens into her research group. She meets on a weekly basis with undergraduate women students in the Department of Mechanical Engineering and so has an excellent opportunity to recruit women students onto the project. In addition, the experience gained on this project will advance the careers of the students involved. The combination of both experimental and computational experience positions the student for a variety of professional positions in a promising new technical area.

奖项摘要建议编号：CTS-0552640主要研究员：Ellzey，Janet L.机构：德克萨斯大学奥斯汀分校建议标题：逆流换热超绝热燃烧氢燃料电池因其环境清洁和高效而成为一项很有前途的技术。虽然氢不是自然产生的，但它构成了天然气、石油衍生品或乙醇等碳氢燃料的主要组成部分。从碳氢燃料中提氢的过程通常被称为重整，产生的气体由二氧化碳、一氧化碳、氢和其他物种组成，称为合成气。合成气可以用作传统碳氢燃料的添加剂，或被提纯并用作燃料电池中的燃料。在这个项目中，将研究一种从碳氢燃料生产合成气的新技术。智力上的优势在于开发了一种新的、更强大的碳氢燃料重整方法。传统的重整技术通常使用催化剂，这些催化剂对入口温度、压力和混合物质量有限制，以实现最佳性能。在拟议的项目中，燃料重整过程基于超绝热燃烧的概念，即热量从燃烧区上游再循环到未燃烧的混合物。升高的或超绝热的温度足以促进非常丰富的碳氢化合物/空气混合物的转化，这些混合物超出了正常的可燃极限。所提出的设计由逆流换热器组成，在逆流换热器中，来自一个通道中的热产品的热量被传递到相邻通道中的冷进料。该设计有可能在稳态运行时产生大流量、高氢含量的合成气。拟议的项目将产生比研究结果更广泛的影响。PI致力于发展一支强大的美国劳动力队伍，并在招募美国公民加入她的研究小组方面有着出色的记录。她每周都会与机械工程系的女本科生见面，因此有很好的机会招募女学生加入这个项目。此外，从这个项目中获得的经验将促进参与的学生的职业生涯。实验和计算经验的结合使学生能够在一个前景看好的新技术领域获得各种专业职位。