Which is the best efficient chiller among reciprocating, rotary, screw or centrifugal? Give reasons.

>>>centrifugal : lower freon piping system pressure than screw compressor ,gear box is needed , can be multistage ,  VFD by guide vans for controlling the velocity .

oil system consist of sensor  and heater and oil cooled by Freon pipe and oil relief valve .

surge can happen in it if the evap. pressure is too low are the condenser pressure is too high .

max velocity3000 rpm

used in higher TR more than2000 TR

______________________________________________________

>>>reciprocating : can be multistage ,  VFD by (block cylinder suction) or (suction valve lift).

oil system consist of sensor  and heater and oil cooled by Freon pipe and oil relief valve .

use for lower TR up to750 TR

----------------------------------------------------------------------------------------------------

>>>screw comp.  : high Freon piping system pressure , VFD by (slid valve ) ,gear box is needed.

oil system consist of sensor  and heater and oil cooled by Freon pipe and oil relief valve .

max velocity3600 rpm

used in intermediate loads