Desirable properties of refrigerant

-Low boiling point (otherwise operation at high vacuum becomes a necessity)

-Low condensing pressure (avoids heavier plant and reduces leakage risk)

-High specific enthalpy of vaporization

-Low specific volume in vapour state (reduces size and increases efficiency)

-High critical temperature

-Non-corrosive & non solvent

-Stable  under working conditions

-Non-flammable & non explosive

-Immiscible with oil (oil separator is a must if miscible)

-Easy leak detection

-Non toxic

-Cheap, easily stored & obtained

Refrigerant used on my ship (Plz know the same for your ship)

R134A----->CF₃CH₂F----> 1,1,1,2-Tetra fluroethane

-does not contain chlorine atoms and thus does not attack the ozone layer.

-But it is a green house gas, may be subjected to future legislation.