Chilled water Pumps
Chilled water Pumps
(OP)
hello
can someone please advice me on why do we select the chilled water pump in the closed loop at 1500 RPM
Why cant we select the pump at 2900 rpm??
Why consultants always suggest with 4 pole motor
is it ok if we use 2900 RPM and then run with VFD
Pleae advice me on this
regards
VEC
can someone please advice me on why do we select the chilled water pump in the closed loop at 1500 RPM
Why cant we select the pump at 2900 rpm??
Why consultants always suggest with 4 pole motor
is it ok if we use 2900 RPM and then run with VFD
Pleae advice me on this
regards
VEC





RE: Chilled water Pumps
RE: Chilled water Pumps
RE: Chilled water Pumps
RE: Chilled water Pumps
RE: Chilled water Pumps
RE: Chilled water Pumps
There is nothing inherently wrong with operating at 2900 RPM, a chilled water service pump has a pretty easy life in which you wouldn't expect to see much wear and tear on the pumps. Also bear in mind, what pump manufacturer you are choosing to use, many pumps have been designed to operate at 3600rpm 60Hz and when applied to 50Hz 3000 rpm they are only operating at about 80% of their max. design, a point worth considering in your analysis.
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: Chilled water Pumps
As far as the 1750/3500 rpm pump discussion goes, I would suspect (or hope) a good pump manufacturer uses better bearings in the higher rpm pump.
Why your engineer selected that pump? - you need to ask him/her. If you select the pump the manufacturer sometimes just has that one for the given flow/pressure. Maybe often the high-pressure pumps tend to be high rpm pumps. If you don't like it, look at a different manufacturer.