zeotrope,that is,they evaporate and condense over a temperature interval(sliding temperature).In R- sisters are the azeotrope fluid numbered 500 and upwards,for example.R-500(73.8%R12,R152a 26.2%) andR502(48.8%R-22,51.2%R-115). Hydrocarbons are referred to in the same way as halocarbons.Examples of this are propane(C3H8)and propylene which respectively have the designation R-290 and R-1270. Inorganic fluid are collected in a separate group with 7 as the first digit and Molecular weight as sequential digits.Examples include ammonia,which,with Molecular weight equal to 17 have the designation R-717,water is designated as R-718 and R-744 carbon dioxide(CO2). 1.3.2 What determines the medium's versatility as a working medium? There are many factors that come in,partly due to deviations from the idealism of the basic process,and partly of more practical nature.To simplify the overview,the elements are grouped according to the following pattern: 1)Features that determine the theoretical process in terms of goodness energy and volume needs.That is to say: power factor [- volumetric thermal performance [kj/m3] 2)Properties of importance for the practical implementation of the process, such as: resulting system pressure [bar] possible operating range of one-step compression -Volume and energy in the compressor heat exchanger effectiveness Dimensions of pipes,valves,etc. compared to oil relation to water conditions for construction materials 3)Properties of the significance of the leak to the environment toxicity flammability -panic creative ability -warning properties(odor,color,etc.) -dilution properties ozone-depleting ability("ozone depletion potential,ODP) -contribution to global warming("global warming potential,GWP) -contribution to environmental damage at the soil surface(smog,acid rain,etc.) -Other possible environmental disturbances 4)Pricing and Availabilityzeotrope, that is, they evaporate and condense over a temperature interval (sliding temperature). In R￾sisters are the azeotrope fluid numbered 500 and upwards, for example. R-500 (73.8% R12, R152a 26.2%) and R502 (48.8% R-22, 51.2% R-115). Hydrocarbons are referred to in the same way as halocarbons. Examples of this are propane (C3H8) and propylene which respectively have the designation R-290 and R-1270. Inorganic fluid are collected in a separate group with 7 as the first digit and Molecular weight as sequential digits. Examples include ammonia, which, with Molecular weight equal to 17 have the designation R-717, water is designated as R-718 and R-744 carbon dioxide (CO2). 1.3.2 What determines the medium's versatility as a working medium? There are many factors that come in, partly due to deviations from the idealism of the basic process, and partly of more practical nature. To simplify the overview, the elements are grouped according to the following pattern: 1) Features that determine the theoretical process in terms of goodness energy and volume needs. That is to say: - power factor [-] - volumetric thermal performance [kj/m3] 2) Properties of importance for the practical implementation of the process, such as: - resulting system pressure [bar] - possible operating range of one-step compression - Volume and energy in the compressor - heat exchanger effectiveness - Dimensions of pipes, valves, etc. - compared to oil - relation to water - conditions for construction materials 3) Properties of the significance of the leak to the environment - toxicity - flammability - panic creative ability - warning properties (odor, color, etc.) - dilution properties - ozone-depleting ability ("ozone depletion potential, ODP) - contribution to global warming ("global warming potential, GWP) - contribution to environmental damage at the soil surface (smog, acid rain, etc.) - Other possible environmental disturbances 4) Pricing and Availability