cost of running motor
cost of running motor
(OP)
anyone can calculate the cost of running a 3 phase 250 kw motor for 10 hours at 0.32p per kwh
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RE: cost of running motor
You need to assume an efficiency to convert to input power. Let's say approx 90%.
That gives input power ~ 1.1x250kw.
kwxhrs = 1.1x250kwx10hr
cost = 1.1x250kwx10hr x 0.32p/(kw hr) = 1.1x250x10x.32 "p"
RE: cost of running motor
RE: cost of running motor
plus demand charges if they apply. Also there may be a duty cycle involved with different loads at different times. What parameters are available to answer these questions?
RE: cost of running motor
I think one other factor to consider is where did the 250kw come from? If it is motor nameplate, it may not represent actual loading in-service.
RE: cost of running motor
I have seen this comment about IEC motor rated in input power before, but all the IEC motors that I have used are rated in shaft power. Any examples??
Best regards,
Mark Empson
http://www.lmphotonics.com
RE: cost of running motor
I can't quote the relevant standards as I sit here though.
RE: cost of running motor
Yes, that certainly makes sense, they are appliances rated with power input as opposed to motors on their own.
Best regards,
Mark Empson
http://www.lmphotonics.com