Superadiabatic Combustion with Counterflow Heat Exchange

获奖摘要建议书编号：CTS-0552640主要研究者：Ellzey，Janet L.机构：德克萨斯大学奥斯汀分校提案标题：逆流热交换超绝热燃烧 氢燃料电池由于其环境清洁的质量和高效率是一种很有前途的技术。 虽然氢不是天然存在的，但它构成了碳氢化合物燃料的主要组成部分，如天然气，石油衍生物或乙醇。从烃燃料中汽提氢气的过程通常被称为重整，并且由二氧化碳、一氧化碳、氢气和其他物质组成的所得气体被称为合成气。 合成气可以用作常规烃燃料的添加剂，或者被纯化并用作燃料电池中的燃料。 在本项目中，将研究从烃燃料生产合成气的新技术。其智力价值在于开发一种新的、更强大的烃类燃料重整方法。传统的重整技术通常使用对入口温度、压力和混合物质量有限制的催化剂，以获得最佳性能。在拟议的项目中，燃料重整过程是基于超绝热燃烧的概念，其中热量从上游的燃烧区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位于正常可燃极限之外的非常富的烃/空气混合物的转化。 所提出的设计包括逆流热交换器，其中来自一个通道中的热产品的热量被传递到邻近通道中的冷进入混合物。 该设计具有在稳态操作下生产大流量高氢含量合成气的潜力，所提出的项目将具有超出研究结果的更广泛的影响。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。她每周与机械工程系的女本科生会面，因此有很好的机会招募女学生参加该项目。此外，在这个项目中获得的经验将促进有关学生的职业生涯。实验和计算经验的结合使学生能够在一个有前途的新技术领域担任各种专业职位。

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.