Ranking of refrigerants.

Environmental ranking of refrigerants is of need in many instances. The aim is to assess the relative environmental hazard posed by 40 refrigerants, including those used in the past, those presently used, and some proposed substitutes. Ranking is based upon ozone depletion potential, global warming potential, and atmospheric lifetime and is achieved by applying the Hasse diagram technique, a mathematical method that allows us to assess order relationships of chemicals. The refrigerants are divided into 13 classes, of which the chlorofluorocarbons, hydrofluorocarbons, hydrochlorofluorocarbons, hydrofluoroethers, and hydrocarbons contain the largest number of single substances. The dominance degree, a method for measuring order relationships among classes, is discussed and applied to the 13 refrigerant classes. The results show that some hydrofluoroethers are as problematic as the hydrofluorocarbons. Hydrocarbons and ammonia are the least problematic refrigerants with respect to the three environmental properties.

[1]  María D. Bovea,et al.  Comparative life cycle assessment of commonly used refrigerants in commercial refrigeration systems , 2007 .

[2]  Rainer Brüggemann,et al.  Ranking patterns, an application to refrigerants , 2008 .

[3]  Rainer Brüggemann,et al.  A Comparison of Partial Order Technique with Three Methods of Multi-Criteria Analysis for Ranking of Chemical Substances , 2002, J. Chem. Inf. Comput. Sci..

[4]  Rainer Brüggemann,et al.  A Theoretical Concept To Rank Environmentally Significant Chemicals , 1999, J. Chem. Inf. Comput. Sci..

[5]  Rainer Brüggemann,et al.  Stability of comparative evaluation —Example: Environmental databases , 1996 .

[6]  W. Trotter,et al.  Combinatorics and Partially Ordered Sets: Dimension Theory , 1992 .

[7]  Wei‐Chyung Wang,et al.  Model calculations of the relative effects of CFCs and their replacements on global warming , 1990, Nature.

[8]  B. Münzer,et al.  A graph-theoretical tool for priority setting of chemicals , 1993 .

[9]  V. L. Orkin,et al.  Determination of atmospheric lifetimes via the measurement of OH radical kinetics. , 2003, Chemical reviews.

[10]  C. A. N. Castro,et al.  Thermophysical Properties of Environmentally Acceptable Refrigerants , 1994 .

[11]  Susan Solomon,et al.  Time-dependent ozone depletion potentials for short- and long-term forecasts , 1992, Nature.

[12]  M. Molina,et al.  Stratospheric sink for chlorofluoromethanes: chlorine atomc-atalysed destruction of ozone , 1974, Nature.

[13]  S. Devotta,et al.  Performance assessment of HC-290 as a drop-in substitute to HCFC-22 in a window air conditioner. , 2005 .

[14]  J. M. Calm,et al.  Refrigerant Data Summary , 2001 .

[15]  Alex Tullo.  THE SWITCH IS ON FOR REFRIGERANTS , 2006 .

[16]  Rainer Brüggemann,et al.  Partially Ordered Sets in the Analysis of Alkanes Fate in Rivers , 2007 .

[17]  Rainer Brüggemann,et al.  METEOR: a step-by-step procedure to explore effects of indicator aggregation in multi criteria decision aiding – application to water management in Berlin, Germany , 2006 .

[18]  H. Güsten,et al.  Predicting tropospheric degradation of chemicals: from estimation to computation. , 1995, SAR and QSAR in environmental research.

[19]  Rainer Brüggemann,et al.  An algebraic/graphical tool to compare ecosystems with respect to their pollution. The German River Elbe as an example. I : Hasse-diagrams , 1994 .

[20]  K. L. Seip.  Restoring water quality in the metal polluted Sørfjorden, Norway , 1994 .

[21]  Wen-Tien Tsai,et al.  Environmental risk assessment of hydrofluoroethers (HFEs). , 2005, Journal of hazardous materials.

[22]  R. Guerrero,et al.  Analysis of diurnal and vertical microbial diversity of a hypersaline microbial mat , 2007, Archives of Microbiology.

[23]  Rainer Brüggemann,et al.  Dominance and separability in posets, their application to isoelectronic species with equal total nuclear charge , 2008 .

[24]  R. Powell.  CFC phase-out: have we met the challenge? , 2002 .

[25]  Donald J. Wuebbles,et al.  Chlorocarbon emission scenarios: Potential impact on stratospheric ozone , 1983 .