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

这个小企业技术转让第一阶段项目是对冷凝喷射器中临界两相流的研究和分析。这一建议采取了一种新的和广泛的方法来分析两相流过程，并带来了能源系统的各种组件的设计方法的实质性改进的可能性。特别是，临界两相流装置的应用将导致开发用于制冷和A/C的更有效的热力学循环，并且在未来还可能用于推进和能量生产。在反朗肯热力学模型中使用冷凝喷射器作为第二步压缩，证明使用冷凝喷射器可以将蒸气压缩制冷循环的效率提高高达40%。考虑到美国每年用于制冷和空调的费用为400亿美元，即使实际上只有一半的效率提高，这也可以转化为每年节省80亿美元。

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.