Why in industries liquid CO2 is stored around the temperature -25°C to -15°C?

Question

By the PV diagram of CO2, the liquid CO2 can be present from -56.4°C to 31.1°C and 5.1 atm to 73.8atm pressure.

Why do almost all industries store the liquid CO2 around the temperature -25°C to -15°C?

Why the industries do not store the liquid CO2 at room temperature 27°C, even though the CO2 is liquid at 27°C?

Answer 1

If you look at the phase diagram, you will notice that you must increase pressure to maintain a particular phase at a higher temperature because melting/freezing and boiling/condensation are equilibrium processes. Industry seeks to optimize cost so while a higher temperature is theoretically possible, the amount of steel needed to contain the higher pressure costs more than the cost of refrigeration.