你可能感興趣的試題

The vacuum maintained in the salt water feed heater shell of a flash-type evaporator is generally accomplished by （）.

A.a separate air ejector unit
B.a direct unimpeded connection between second stage and salt water feed heater
C.either by vacuum drag or an external line from the first stage via a fixed orifice
D.the fixed orifice provided in the steam supply line

單項(xiàng)選擇題

In which of the listed refrigeration system components does superheating of the refrigerant take place?（）

A.Expansion valve
B.Evaporator
C.Drier
D.Receiver