A cold air unit allows for cabin temperatures to be
- a little more than ambient air temperature.
- lower than ambient air temperature despite compression heating.
- same as ambient temperature, despite compression heating.
Explanation
A cold-air unit can only cool the charge air down towards, and slightly above, the ambient (ram) air temperature used as its heat sink, since it cannot reject heat to anything colder than ambient. It cannot drive the cabin below ambient like a refrigerant system, so a little above ambient is the achievable result.
Jordi asking:
why not lower?It says cold air unit.
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