Table 4 Comparison of the properties of subcritical vapor CO2 at different pressures with water at atmospheric pressure for different operating temperatures33.
From: Heat transfer enhancement using CO2 in a natural circulation loop
Pressure of CO2 (bar) | Avg. Temperature, Tavg(°C) | Density ratio, ρCO2/ρWater | Specific heat ratio, Cp_CO2/ Cp_Water | Thermal conductivity ratio, kCO2/kWater | Viscosity ratio, μCO2/μWater | Ratio of volumetric coefficient, βCO2/βWater |
|---|---|---|---|---|---|---|
40 | 41 | 0.08 | 0.30 | 0.03 | 0.03 | 16.11 |
46 | 0.08 | 0.29 | 0.03 | 0.03 | 13.83 | |
51 | 0.07 | 0.28 | 0.03 | 0.03 | 12.08 | |
50 | 41 | 0.11 | 0.35 | 0.04 | 0.03 | 20.56 |
46 | 0.11 | 0.33 | 0.04 | 0.03 | 17.17 | |
51 | 0.11 | 0.32 | 0.04 | 0.03 | 14.67 | |
60 | 41 | 0.15 | 0.43 | 0.04 | 0.03 | 27.92 |
46 | 0.14 | 0.40 | 0.04 | 0.03 | 22.27 | |
51 | 0.14 | 0.37 | 0.04 | 0.03 | 18.39 | |
70 | 41 | 0.20 | 0.59 | 0.05 | 0.03 | 42.45 |
46 | 0.18 | 0.50 | 0.05 | 0.03 | 30.91 | |
51 | 0.17 | 0.45 | 0.04 | 0.03 | 24.09 |
