by the ratio between cast heat output qk and gas specific volume in the inlet of compressor,vi(see also Section 1.2.2.4,"pressure /enthalpy chart"). [kJ/m] Volumetric heat output expresses thus prepared heat output rates sucked in unit volume sucked in gas to compressor.The most important fluid attribute here is evaporating pressure when different fluid are compared,one will see that the volumetric heat performance is very close to inversely proportional to absolute pressure evaporates.Use of a low pressure medium,which is beneficial in that the condenser is located in a safe distance from the critical pressure will therefore result in a need for large and costly compressors.Figure 1.29(left)shows the volumetric heat output of some relevant working fluids varies with the condensation temperature at evaporating temperature at 0C.COz is not included in the figure, but because of its high pressure typically 5-6 higher volumetric heat performance than ammonia and propane.Right picture-the pressure ratio for most appropriate working fluids is plotted as function of evaporation temperature. 30000 8000 -t-R744 ·NHg R-410 7000 R22 25000 --R717 R-22 propar 407C 6000 12 R-290 20000 -R-134 134a 5000 R12 C02 15000 4000 R410A R4070 3000 10000 R290 2000 R134 5000 1000 30 40 50 60 70 80 0 20 20 0 60 80100 T[c] condensing temperature [C] Figure 1.29 Volumetric heat output as a function of condensing temperature at constant evaporation temperature 0C for a selection of working fluids(left),the same for different evaporation temperatures (right) 1.3.4.4 Power factor Basically,all process fluid as effective,provided that they work in a thermodynamically ideal process. When there are differences in theoretical power factor(in cold-steam process),tied up with differences in relative losses and overheating losses as previously described in Section 1.2.2.2,"Relative losses and overheating losses".Figure 1.11 page 1-12 shows the theoretical power factor of the heat pump ("lossless"cold steam process)as a function of condensing temperature at constant evaporation temperature at 0C for the most appropriate working fluids.The path for Carnot power factor plotted for comparison.by the ratio between cast heat output qk and gas specific volume in the inlet of compressor, v1 (see also Section 1.2.2.4, "pressure / enthalpy chart"). Volumetric heat output expresses thus prepared heat output rates sucked in unit volume sucked in gas to compressor. The most important fluid attribute here is evaporating pressure when different fluid are compared, one will see that the volumetric heat performance is very close to inversely proportional to absolute pressure evaporates. Use of a low pressure medium, which is beneficial in that the condenser is located in a safe distance from the critical pressure will therefore result in a need for large and costly compressors. Figure 1.29 (left) shows the volumetric heat output of some relevant working fluids varies with the condensation temperature at evaporating temperature at 0 ° C. CO2 is not included in the figure, but because of its high pressure typically 5-6 higher volumetric heat performance than ammonia and propane. Right picture – the pressure ratio for most appropriate working fluids is plotted as function of evaporation temperature. Figure 1.29 Volumetric heat output as a function of condensing temperature at constant evaporation temperature 0 ° C for a selection of working fluids (left), the same for different evaporation temperatures (right) 1.3.4.4 Power factor Basically, all process fluid as effective, provided that they work in a thermodynamically ideal process. When there are differences in theoretical power factor (in cold-steam process), tied up with differences in relative losses and overheating losses as previously described in Section 1.2.2.2, "Relative losses and overheating losses". Figure 1.11 page 1-12 shows the theoretical power factor of the heat pump ("lossless" cold steam process) as a function of condensing temperature at constant evaporation temperature at 0 ° C for the most appropriate working fluids. The path for Carnot power factor plotted for comparison