Air or noncondensable gas is removed from a refrigeration system by a ()
A、separating chamber
B、system of baffles
C、purge valve
D、vacuum reducing valve
A、separating chamber
B、system of baffles
C、purge valve
D、vacuum reducing valve
A、an auxiliary reservoir B、a controlling air bottle C、an emergency air compressor D、a main air compressor
A、A.Air or Nitrogen B、B.Seawater or Fresh water C、C.Sodium Nitrate brine D、D.Calcium Sulfate brine
A、A.pressure changes in the air mass B、B.movement of the air mass C、C.the heterogeneous nature of the air mass D、D.upper level atmospheric changes
A、the starting air distributor B、the cut-off valve on the air main C、the main starting valve D、the air bottle control valve
A、A.Oil vapour in air piping are dangerous B、B.Explosion will cause oil vapouring in air lines C、C.Oil vapour in air piping should be drained D、D.Oil in air piping should not be drained