STTR Phase I: Condensing Ejector for Second-Step Compression in Reversed Rankine Cycle

STTR 第一阶段：用于逆朗肯循环第二级压缩的冷凝喷射器

• 批准号: 0610613
• 负责人: Mark Bergander
• 金额: --
• 依托单位: Magnetic Development, Inc.
• 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: 2006-07-01 至 2007-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0610613&HistoricalAwards=false
• 关键词: STTR; Phase; Condensing; Ejector; Second

This Small Business Technology Transfer Phase I project is the research and analysis of critical two-phase flow in condensing ejectors.. This proposal takes a novel and broad-based approach to analyzing the two-phase flow processes and brings about the possibility of substantial improvement in design methodology for various components of energy systems. In particular, the application of critical two-phase flow devices will lead to development of more efficient thermodynamic cycles for refrigeration and A/C and in the future possibly also for propulsion and energy production. Use of a condensing ejector as a second step compression in a reverse-Rankine thermodynamic model has demonstrated that by using, the efficiency of vapor compression refrigeration cycle can be improved by as much as 40%. Considering $40 Bln per year spent for refrigeration and A/C in US, this can translate into an annual savings of $8 Bln even if only half of this efficiency improvement is realized in practice.

这个小型企业技术转移第一阶段项目是研究和分析冷凝式喷射器中的临界两相流。这一建议采用了一种新颖而广泛的方法来分析两相流过程，并为能源系统的各个组成部分的设计方法带来了实质性改进的可能性。特别是，关键两相流设备的应用将导致开发更高效的制冷和空调热力学循环，并在未来可能还用于推进和能源生产。在逆朗肯热力学模型中，采用冷凝喷射器作为二次压缩，可以将蒸汽压缩制冷循环的效率提高40%。考虑到美国每年在制冷和空调上花费的400亿美元，这可以转化为每年节省80亿美元，即使这种效率提高在实践中只实现了一半。