Take a Generac 80kW 3ph with the 5.4L V8 at 3600 RPM. At 100% load, that
thing uses 1.25M BTU/Hr. And their 100kW 3ph with the 6.8L V10 @ 2300
RPM uses 1.26M BTU/Hr. Which is actually rated at 94kW. Around here we
can get 500k BTU/2 PSI meters. >1M BTU/hr actual load bumps you out of
residential territory. So my guess is you'd probably want 5 PSI delivery
if you can get it. But I'm just an internet idiot, so you should
probably talk to your gas co and a plumber and find out exactly how much
pressure and volume you can actually get.
On 12/3/2016 10:02 AM, Chuck McCown wrote:
I will have to ask. 100 kW generator will probably take 300 kW or 1M
BTU. A bit more than a home, but I think my furnaces and my ovens and
my cooktop would be a half million if all on at the same time. My
main shop is 2M.
-----Original Message----- From: Adam Moffett
Sent: Friday, December 02, 2016 9:52 PM
To: [email protected]
Subject: Re: [AFMUG] generator fuel
Yeah, I was just wondering whether the gas pipe will deliver the volume
that you need to keep the genny running.
They might not have planned on your proposed consumption when they laid
the pipes.
------ Original Message ------
From: "Robert" <[email protected]>
To: [email protected]
Sent: 12/2/2016 10:55:55 PM
Subject: Re: [AFMUG] generator fuel
Are you getting the NG delivered by pipe?
On 12/2/16 5:49 PM, Chuck McCown 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?
