LT: Design of Environmentally Benign Refrigerants

9873586如果要防止平流层臭氧的消耗和全球变暖，Sahinhalo制冷技术必须消除对氯氟烃制冷剂（CFC）及其替代品的需求。 本研究的目的是开发一种系统的方法或设计环境友好的替代制冷剂。 为了实现这一目标，研究人员计划（1）开发一种数学模型，该模型选择制冷剂或制冷剂混合物的原子组成，以满足环境和化学约束，同时优化制冷剂生命周期的能源效率和总体变暖影响，（二）设计一种算法程序来解决上述模型，以克服问题的组合困难以及与属性预测估计中的不准确性相关的困难技术，（3）建立用于验证、测试和实施理论模型和算法方法的计算/实验系统，以及（4）通过实验室合成和测试新设计的化合物来寻求理论发现的实验验证。 该研究将强调来自大气化学，过程和溶液热力学，过程和产品设计以及运筹学（离散和非线性优化理论）的跨学科思想的相互作用。 初步结果表明，所提出的方法具有很高的成功概率。 特别地，已经开发了氟利昂12的新替代物，其具有使其在典型制冷循环的情况下比氟利昂12更有效的热力学性质。 这项资助是根据1998年NSF/朗讯科技工业生态学研究奖学金计划联合提供的。***

9873586 Sahinidis Refrigeration technology must eliminate the need for chlorofluorocarbon refrigerants (CFCs) and their substitutes if depletion of stratospheric ozone and global warming are to be prevented. The objective of this research is to develop a systematic methodology or the design of environmentally benign alternative refrigerants. Towards this goal, the researchers plan to (1) develop a mathematical model which selects the atomic composition of a refrigerant or refrigerant mixture in such a way that environmental and chemical constraints are satisfied while the energy efficiency and total warming impact of the refrigerant life-cycles are optimized, (2) devise an algorithmic procedure to solve the above model in a way that overcomes the combinatorial difficulty of the problem as well as difficulties associated with inaccuracies in property prediction estimation techniques, (3) establish a computational/experimental system for verifying, testing and implementing the theoretical models and algorithmic methods and (4) seek experimental verification of the theoretical findings through laboratory synthesis and testing of the newly designed compounds. The research will emphasize the interdisciplinary interaction of ideas from atmospheric chemistry, process and solution thermodynamics, process and product design and operations research (discrete and nonlinear optimization theory). Preliminary results demonstrate that the proposed approach carries a high probability of success. In particular, a novel replacement of Freon 12 has been developed that possesses thermodynamic properties that render it more efficient than Freon 12 in the context of a typical refrigeration cycle. This grant is made pursuant to the joint NSF/Lucent Technologies Industrial Ecology Research Fellowships Program 1998. ***