minimum/maximum flow as a function of the specific speed
minimum/maximum flow as a function of the specific speed
(OP)
In an effort to screen the right operation of the population of pumps in our powerplants I would like to compare the position of the actual working point to the BEP of the pump in question. Additional to that I would like to be able to make a judgement whether the pump has a working point, that might exceed the minimum or maximum flow of the pump. With that I would assume that operating a pump in a flow interval between minimum and maximum flow doesn't affect the failure rate of that pump. Is there any guideline what the maximum flow and the minimumflow of a specific pump is as a function of the specific speed? Any reference to literature, standards or experience is welcome.
Karel Postulart, The Netherlands
Nuon Power Generation





RE: minimum/maximum flow as a function of the specific speed
See Attached;
"The top of the organisation doesn't listen sufficiently to what the bottom is saying." Tony Hayward X-CEO BP
http://www.youtube.com/watch?v=hpiIWMWWVco
"Being GREEN isn't easy." Kermit
http://virtualpipeline.spaces.live.com
RE: minimum/maximum flow as a function of the specific speed
here it is
"The top of the organisation doesn't listen sufficiently to what the bottom is saying." Tony Hayward X-CEO BP
http://www.youtube.com/watch?v=hpiIWMWWVco
"Being GREEN isn't easy." Kermit
http://virtualpipeline.spaces.live.com
RE: minimum/maximum flow as a function of the specific speed
Karel Postulart, The Netherlands
Nuon Power Generation
RE: minimum/maximum flow as a function of the specific speed
"The top of the organisation doesn't listen sufficiently to what the bottom is saying." Tony Hayward X-CEO BP
http://www.youtube.com/watch?v=hpiIWMWWVco
"Being GREEN isn't easy." Kermit
http://virtualpipeline.spaces.live.com
RE: minimum/maximum flow as a function of the specific speed
Johnny Pellin
RE: minimum/maximum flow as a function of the specific speed
"The top of the organisation doesn't listen sufficiently to what the bottom is saying." Tony Hayward X-CEO BP
http://www.youtube.com/watch?v=hpiIWMWWVco
"Being GREEN isn't easy." Kermit
http://virtualpipeline.spaces.live.com
RE: minimum/maximum flow as a function of the specific speed
And, on top of all of this, we have to consider the service. A failure of a pump in 500 °F Naphtha is much more of a concern than a failure of a cooling water pump. So, for non-hazardous services, we are more likely to compromise. And, some things are just impossible to predict. We have pumps in our products blending system that are regularly operated as low as 10% of BEP, but are among the most reliable pumps in the refinery. And we have others that will fail quickly if they are operated below 80% of BEP. So, we set criteria and try to minimize the exceptions we grant. And, then we use Root Cause Failure Analysis and vibration analysis to identify applications where the criteria are not stringent enough.
Johnny Pellin
RE: minimum/maximum flow as a function of the specific speed
"The top of the organisation doesn't listen sufficiently to what the bottom is saying." Tony Hayward X-CEO BP
http://www.youtube.com/watch?v=hpiIWMWWVco
"Being GREEN isn't easy." Kermit
http://virtualpipeline.spaces.live.com
RE: minimum/maximum flow as a function of the specific speed
(Springer Verlag ). It does indicate a limit for the minimum flow and the maximum flow as well.
Karel Postulart, The Netherlands
Nuon Power Generation
RE: minimum/maximum flow as a function of the specific speed
Karel Postulart, The Netherlands
Nuon Power Generation