Seconday chilled water pumping options
Seconday chilled water pumping options
(OP)
Am looking at a variable flow secondary chilled water pumping system, with a total flow rate of 200L/s controlled by a pressure sensor in the pipework.
Currently the system comprises 1 pump at 200L/s plus a low load pump of 60L/s (plus a standby 200L/s pump). Normally the system runs with the single 200L/s pump.
The alternative is to provide 3 pumps at 100L/s (ie 2 duty + standby) in lieu of the first combination.
Am looking for pros and cons for both and any control issues that may arise?
Currently the system comprises 1 pump at 200L/s plus a low load pump of 60L/s (plus a standby 200L/s pump). Normally the system runs with the single 200L/s pump.
The alternative is to provide 3 pumps at 100L/s (ie 2 duty + standby) in lieu of the first combination.
Am looking for pros and cons for both and any control issues that may arise?





RE: Seconday chilled water pumping options
RE: Seconday chilled water pumping options
RE: Seconday chilled water pumping options
RE: Seconday chilled water pumping options
RE: Seconday chilled water pumping options
RE: Seconday chilled water pumping options
PID control setting need to be set for both operating modes but this is not a real issue. Also need to consider VSD ramp speed which again is not an issue.
The system flow/pressure characteristic would remain similar for both options so power consumption should be similar? A large pump running at low speed should be efficient, but a large motor running slow may be less efficient.
RE: Seconday chilled water pumping options
It didn't offend- it just keeps everyone on "the same page".