sump, trace, space heater demand factors??

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leblar1

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Hey guys,

I am tasked with trying to size a generator for a barge which is being built in Oregon. On this barge are multiple engines and heaters. If I go 100% on everything I end up with 70kva plus or minus. I wonder whether or not to bring the demand factors down any for the heating equipment.

The heating equipment is 80% of my load if it is on at the same time. During the summer my generator will be wet stacking bad.

any ideas???

Thanks

ANdre
 
If by "barge" you are referring to something that floats, then the NEC does not apply, and NEC related demand factors would not help you. The Coast Guard has its own set of rules, and its own set of demand factors. I no longer work in that field, and I don't remember where to tell you to look for the applicable rules. But they are generally helpful people, so you might start by giving them a call.
 
The first thing that comes to mind for me is, must it be jst one generator?

I guess NFPA 110 recommends load banks .
 
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The Coast Gaurd, except in speciall instances still refers to the NEC. CFR 46 for shipping does not have any listing for demand factors as far as I know.

As for as two generators. Since this is a floating barge it does not "require" as second genset such as on a vessel.

I will look further in the CFR's and ABS specs.

Thanks

Andre
 
Sec. 111.10-4 Power requirements, generating sources.

(a) The aggregate capacity of the electric ship's service generating
sources required in Sec. 111.10-3 must be sufficient for the ship's
service loads.
(b) With the ship's service generating source of the largest
capacity stopped, the combined capacity of the remaining electric ship's
service generating source or sources must be sufficient to supply those
services necessary to provide normal operational conditions of
propulsion and safety, and minimum comfortable conditions of
habitability. Habitability services include cooking, heating, air
conditioning (where installed), domestic refrigeration, mechanical
ventilation, sanitation, and fresh water.


Here is an excerpt,

Andre
 
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