Table 5 Comparison of the properties of subcritical liquid CO2 at different pressures with brine 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/ρbrine | Specific heat ratio, Cp_CO2/Cp_ brine | Thermal conductivity ratio, kCO2/kbrine | Viscosity ratio, μCO2/μbrine | Ratio of volumetric coefficient, βCO2/βbrine |
|---|---|---|---|---|---|---|
35 | −16.5 | 0.89 | 0.64 | 0.25 | 0.004 | 16.19 |
−14.5 | 0.89 | 0.64 | 0.25 | 0.004 | 16.52 | |
40 | −2.5 | 0.83 | 0.70 | 0.21 | 0.002 | 19.48 |
−9 | 0.86 | 0.66 | 0.23 | 0.003 | 17.34 | |
−14 | 0.89 | 0.64 | 0.23 | 0.004 | 16.30 | |
45 | −2.5 | 0.84 | 0.69 | 0.21 | 0.003 | 18.86 |
2.5 | 0.81 | 0.73 | 0.20 | 0.002 | 21.27 |
