OK, but what would be the cost to have your power co bring 3phase to
you? More or less than a 3-phase generator? Or can they simply not do it?
On the other hand, what would it then cost you for 3-phase service from
said power co? I know of a couple grain handling sites around here pay
about $1200/mo. But that's cheaper over the long haul than buying,
maintaining and paying fuel cost for a 100kW genset, even NG.
On 12/2/2016 8:18 PM, Chuck McCown wrote:
Not bad considering my NG is going to cost half or less than diesel.
And it will be periodic use, not constant.
I need to make a boatload of 3 phase 480 where only single phase
exists an the loads will be highly variable.
I could use a big ass rotary phase converter but based on the cost of
fuel alone, I will save money just running the generator when needed.
Especially true if they charge me a demand charge.
*From:* Eric Kuhnke
*Sent:* Friday, December 02, 2016 7:11 PM
*To:* [email protected]
*Subject:* Re: [AFMUG] generator fuel
Looking at it another way, I have calculated previously that the cost
per kWh for 24x7 power from a diesel generator is in the range of
$0.35 to $0.49 per kWh. That's including the purchase cost of the
generator, maintenance, expected lifespan, cost of fuel, etc.
If you want to see prime power examples of diesel used for islanded
grid power, each town in Nunavut has its own set of diesel generators
and tanks. There is no long distance transmission setup or inter-city
grid.
http://www.qec.nu.ca/home/
On Fri, Dec 2, 2016 at 5:57 PM, Chuck McCown <[email protected]> wrote:
I agree, but my application is primary power, not emergency.
*From:* Eric Kuhnke
*Sent:* Friday, December 02, 2016 6:53 PM
*To:* [email protected]
*Subject:* Re: [AFMUG] generator fuel
I don't think it's fair to directly compare diesel fuel to natural
gas, because one is portable in just about any container (in a
real emergency), the other is not.
http://www.datacenterknowledge.com/archives/2012/10/31/peer-1-mobilizes-diesel-bucket-brigade-at-75-broad/
<http://www.datacenterknowledge.com/archives/2012/10/31/peer-1-mobilizes-diesel-bucket-brigade-at-75-broad/>
On Fri, Dec 2, 2016 at 5:49 PM, Chuck McCown <[email protected]> wrote:
I am assuming a BTU of fuel will make so many Wh of energy.
If perfectly efficient 1M BTU =292.3 kWh
That would cost me *$35* from the power utility.
A gallon of diesel is abou $3.25 around here. 139000 btu.
Diesel then is about $23 per 1M btu.
However diesel engines are only 30% efficient so it will cost
me *$76* in fuel to make that 292.3 kWh
If that assumption is approximately correct:
I pay about $7.80 per decatherm in the winter for NG. A
decatherm is 1 million btu
About half that in summer.
$7.80/.3= *$26*/293.3 kWh for NG not considering depreciation
and maint of the generator.
It seems to me that NG is the hands down fuel cost winner?
Anyone see mistakes in this?
