No. of Generating units
No. of Generating units
(OP)
Hi everyone, I asked this Q in another forum and the people there advised me to put it up in here. This is the reference thread of my Question.
http://www .eng-tips. com/viewth read.cfm?q id=267729& amp;page=1
I would appreciate some help. :)
http://www
I would appreciate some help. :)
"Common sense is genius dressed in its working clothes." -- Ralph Waldo Emerson





RE: No. of Generating units
RE: No. of Generating units
Seems like foundations, power controllers and breakers, extra pipe runs (for the third or fourth pumps), extra valves, and extra spares ould have to be considered.
On the other hand, the client gets betters reliability.
But at low operating levels, only one small pump is running rather than a single over-sized pump at low efficiency.
However, should they size the small pumps so only 2 of 3 are needed at full load? Or only 2 of 4?
RE: No. of Generating units
About that, and claiming essentially zero expertise, I think they can be had with variable area nozzles and automatic controls to keep the velocity constant at reduced flows.
Mike Halloran
Pembroke Pines, FL, USA
RE: No. of Generating units
With that head, flow and power generated, I think you are talking about Pelton turbines. It is widely accepted that, for these turbines, the minimum flow for operation at a good efficiency is 20% of design flow.
Regarding with the number and size of the units for the plant, I am sending the specifications EM 1110-2-1701 of 31 Dec 1985, clause f, page 6-20. This document even today is as fresh as it can be.
RE: No. of Generating units
Thank you Rakoo and Mike for the insights too. I really appreciate it.
"Common sense is genius dressed in its working clothes." -- Ralph Waldo Emerson