marinechiller
12-02-2010, 04:11 PM
Selecting compressors for water to water heat pump (seawater both sides). Must be 10hp nominal, must be capable of 50% and 100% step control.
Looking at Copeland Discus because suction temps get into both the low temp and med temp ranges. The appropriate compressor is 3 cylinder, but client is pushing hard for the 50% step. We can pull it off by using the Copeland Moduload setup which is a timed on/off cycle to achieve 10-100% capacity.
Evap/Condensors are shell/tube style
The Question: How does switching compressor load on/off affect evaporator/condensor performance? The flow must be starting and stopping throughout the system?
Anybody with experience using the moduload system please comment on your experiences.
Thanks,
marinechiller
Looking at Copeland Discus because suction temps get into both the low temp and med temp ranges. The appropriate compressor is 3 cylinder, but client is pushing hard for the 50% step. We can pull it off by using the Copeland Moduload setup which is a timed on/off cycle to achieve 10-100% capacity.
Evap/Condensors are shell/tube style
The Question: How does switching compressor load on/off affect evaporator/condensor performance? The flow must be starting and stopping throughout the system?
Anybody with experience using the moduload system please comment on your experiences.
Thanks,
marinechiller