基于基团贡献法的制冷工质GWP计算探讨

DISCUSSION OF REFRIGERANT GWP CALCULATION BASED ON GROUP CONTRIBUTION METHOD

随着全球气候变暖趋势的问题不断引起重视,人们在不断寻求新的GWP值较小的制冷剂替代物.然而由于气体GWP的相关影响因素太多,需要的数据非常大。因此标准的GWP值计算比较复杂,计算周期也较长.通过对气体宏观特性是某些微观性质的表现这一基本理论的分析,本文基于基团贡献法和几种简单制冷剂分子的标准GWP值,建立了制冷剂分子的GWP估算的基团贡献法计算模型,计算结果能较好地满足制冷剂气体对GWP的估算.同时本文通过对大气平衡态的分析以及对制冷剂气体在大气分解产物的研究,注意到某些气体的分解产物可能还存在较高的GWP值,这些降解产物还可能对环境起着破坏作用,因此提出了新的GWP_(LCC)概念来对这种情况进行分析.

With paying attention to the problem of global warming trends, people constantly seek new smaller GWP alternative refrigerants. However, there are so many relevant factors to influence GWP and data are very large, therefore standards GWP value calculation is very complex and the calculation period is so longer. Through the basic theoretical analysis of that, the gas macro characteristics ars some performances of micro nature characteristics, the paper builds group contribution calculation model of refrigerant GWP estimation based on group contribution method and some simple refrigerants elements＇ standard GWP, the result show it can better meet refrigerants GWP estimation. At the same time, through the atmospheric equilibrium analysis and refrigerant decomposition in atmo- spheric research, paper notes that some refrigerant decomposition products may still hold higher GWP value, and so these decomposition products maybe play a destabilizing and destructive role on the environment. Therefore a new GWPLCC concept is proposed in order to evaluating the environmental protection.