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Home > Archive > Alternative Power sources > March 2008 > 3500w propane generator
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3500w propane generator
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| ...........Rob 2008-03-10, 8:25 pm |
| 3500W PROPANE GENERATOR
* 3,500W surge, 2,800W rated
* 6.5 HP OHV engine
* Automatic fuel shut-off safety valve
* Produces 27.5A @ 120V
* 2 AC 120V outlets
* 1 AC 120V/240 twist lock outlet
* 1 12V outlet
* Runs 20 hrs @ 1/2 load on 5 gal/20 lbs. of fuel
* Propane fuel hose included
* Operating noise 68 dB
* Propane fuel provides cleaner emissions
and longer run time
Wt. 105.6 lbs.
8190365 SPECIAL $599.99
Princess Auto has this generator. The propane seems good, Price not
bad,
Same one as advertised here;
http://www.heartlandamerica.com/bro...&GUID=&DL=IVU4#
for back-up home power.
Propane, winter starting?
anybody using one?
opinions,
Thanks............Rob
| |
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| "...........Rob" <rss1@anywebcam.com> wrote in
news:e19ce1df-5574-4a94-bec5-76fd9634b7ff@d62g2000hsf.googlegroups.com:
> Princess Auto has this generator. The propane seems good, Price not
> bad,
> Same one as advertised here;
>
> http://www.heartlandamerica.com/bro...3500watt-propan
> e-generator&PIN=53714&GUID=&DL=IVU4#
>
> for back-up home power.
>
> Propane, winter starting?
>
> anybody using one?
>
> opinions,
>
> Thanks............Rob
>
Never used one but propane prices have gone way up around here -- still
cheaper than gas though.
Along the same lines, have any of you ever build a custom exaust for one
of these? Or similar generators? The 68 DB is pretty dang loud. My
buddy has a pipe bender and I always wondered just how much you could
gain by fitting like a car muffler and longer exaust onto a generator
like this one.
Or is it really the sound of the engine itself that makes most of the
noise?
| |
| Daniel Who Wants to Know 2008-03-11, 3:25 am |
| "z" <z@yada.yada.com> wrote in message
news:Xns9A5DCEEDC245Dzyadayadayada@216.196.97.131...
> "...........Rob" <rss1@anywebcam.com> wrote in
> news:e19ce1df-5574-4a94-bec5-76fd9634b7ff@d62g2000hsf.googlegroups.com:
>
>
> Never used one but propane prices have gone way up around here -- still
> cheaper than gas though.
>
> Along the same lines, have any of you ever build a custom exaust for one
> of these? Or similar generators? The 68 DB is pretty dang loud. My
> buddy has a pipe bender and I always wondered just how much you could
> gain by fitting like a car muffler and longer exaust onto a generator
> like this one.
>
> Or is it really the sound of the engine itself that makes most of the
> noise?
I once attached a muffler for a 2.2 Plymouth Reliant to the stock tubular
muffler on a 5 HP Briggs and it quieted most of the noise of the engine with
the exception of the valve noise which really wasn't that bad.
| |
|
| The more muffler, the more back pressure, less fuel economy. I think
the idea is to get a tuned pipe like an organ pipe... 1/4 wavelength
open at one end.... the 'bang' propagates down the pipe at the speed
of sound... 1120 ft/sec and you want a low pressure antinode at the
exhaust port when the valve opens to suck out the exhaust. 3600 rpm is
60 rps and 30 'bangs per sec', 33ms per bang. So over 33ft wavelength,
1/4 wavelength would be about 8 or 9 ft. I'd make it slide like a
trombone so you could tune it to min fuel flow at running speed. Might
have a distinctive resonance at the tuned point.
| |
|
| z wrote:
> "...........Rob" <rss1@anywebcam.com> wrote in
> news:e19ce1df-5574-4a94-bec5-76fd9634b7ff@d62g2000hsf.googlegroups.com:
>
>
>
>
> Never used one but propane prices have gone way up around here -- still
> cheaper than gas though.
Propane should be lest expensive. A gallon of propane has only 73% of
the energy content of a gallon of gasoline.
>
> Along the same lines, have any of you ever build a custom exaust for one
> of these? Or similar generators? The 68 DB is pretty dang loud. My
> buddy has a pipe bender and I always wondered just how much you could
> gain by fitting like a car muffler and longer exaust onto a generator
> like this one.
>
> Or is it really the sound of the engine itself that makes most of the
> noise?
| |
|
| ............Rob wrote:
> 3500W PROPANE GENERATOR
> * 3,500W surge, 2,800W rated
> * 6.5 HP OHV engine
> * Automatic fuel shut-off safety valve
> * Produces 27.5A @ 120V
> * 2 AC 120V outlets
> * 1 AC 120V/240 twist lock outlet
> * 1 12V outlet
> * Runs 20 hrs @ 1/2 load on 5 gal/20 lbs. of fuel
> * Propane fuel hose included
> * Operating noise 68 dB
> * Propane fuel provides cleaner emissions
> and longer run time
> Wt. 105.6 lbs.
> 8190365 SPECIAL $599.99
>
> Princess Auto has this generator. The propane seems good, Price not
> bad,
> Same one as advertised here;
>
> http://www.heartlandamerica.com/bro...&GUID=&DL=IVU4#
>
> for back-up home power.
>
> Propane, winter starting?
>
> anybody using one?
>
> opinions,
>
> Thanks............Rob
I like propane as a fuel and am planning to convert my 4500 KW Generac
to propane this summer. I have the conversion kit and am looking
forward to doing it.
I have a couple of observations though.
In my case I come close to loading up my 4,500 watts generator at some
times. The problem is largely imaginary current, but it's still a
problem. Some of my loads have very poor power factors.
Also, have you looked carefully at how big a propane tank you'll need
to run this generator at the lowest temperature you'll encounter? In my
case, at -20 F I need at a minimum a 420 lb vertical tank to avoid a
freeze up due to auto-refrigeration.
Boden
| |
| hubops 2008-03-11, 5:25 pm |
|
>3500W PROPANE GENERATOR
>* 3,500W surge, 2,800W rated
>* 6.5 HP OHV engine
>* Automatic fuel shut-off safety valve
>* Produces 27.5A @ 120V
>* 2 AC 120V outlets
>* 1 AC 120V/240 twist lock outlet
>* 1 12V outlet
>* Runs 20 hrs @ 1/2 load on 5 gal/20 lbs. of fuel
>* Propane fuel hose included
>* Operating noise 68 dB
>* Propane fuel provides cleaner emissions
>and longer run time
>Wt. 105.6 lbs.
>8190365 SPECIAL $599.99
>Princess Auto has this generator. The propane seems good, Price not
>bad,
>Same one as advertised here;
>http://www.heartlandamerica.com/bro...&GUID=&DL=IVU4#
>for back-up home power.
>Propane, winter starting?
>anybody using one?
>opinions,
>Thanks............Rob
Do you run any large motors ? Well pump ?
I'm guessing 6.5 HP is marginal.
My 10 HP Honda reacts when my well pump
kicks in - with a little momentary drop in speed.
That is with no other loads - just the well.
Maybe see if Princess Auto will give a refund - if it proves too
small for your use ? They might surprise you.
Good luck.
Post your results here - for all our info.
John T.
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| Vaughn Simon 2008-03-11, 5:25 pm |
|
"BobG" <bobgardner@aol.com> wrote in message
news:35f0dcfc-75a6-439b-8587-992d47d57e06@8g2000hse.googlegroups.com...
> The more muffler, the more back pressure, less fuel economy.
Not necessarily true. Back pressure depends on the internal design of the
muffler. Everything else being equal, if you simply scale a muffler up, it will
allow more flow and will have LESS backpressure compared to a smaller version of
the same muffler.
Vaughn
| |
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| "Vaughn Simon" <vaughnsimonHATESSPAM@att.FAKE.net> wrote in
news:YbCBj.1174$D_3.741@bgtnsc05-news.ops.worldnet.att.net:
>
> "BobG" <bobgardner@aol.com> wrote in message
> news:35f0dcfc-75a6-439b-8587-992d47d57e06@8g2000hse.googlegroups.com...
>
> Not necessarily true. Back pressure depends on the internal design
> of the
> muffler. Everything else being equal, if you simply scale a muffler
> up, it will allow more flow and will have LESS backpressure compared
> to a smaller version of the same muffler.
>
>
> Vaughn
>
>
>
Yeah i figure, given the diameter of your average car muffler and exaust
system the backflow shouldn't be any greater because the thing was
designed to allow a hell of a lot more exaust through it than your little
generator is making.
Now the idea of making a trombone type tunable mufler setup is pretty
cool. You could adjust it till it was sweet and clamp it in place and
weld -- or leave it clamped and if you ever change generators you could
retune.
The other idea I had was to run some copper water lines along the muffler
and exaust and then ciculate that through my green house during winter.
Just make use of all that heat to do something
| |
| Ulysses 2008-03-11, 8:25 pm |
|
"hubops" <tabbertj@perth.net> wrote in message
news:2s4et31ciiinuprsno6lak50274lqpelrl@4ax.com...
>
>
>http://www.heartlandamerica.com/bro...watt-propane-ge
nerator&PIN=53714&GUID=&DL=IVU4#
>
>
> Do you run any large motors ? Well pump ?
> I'm guessing 6.5 HP is marginal.
> My 10 HP Honda reacts when my well pump
> kicks in - with a little momentary drop in speed.
> That is with no other loads - just the well.
It's unlikely that a 3500 watt generator would have 240 volts--that
twistlock probably only outputs 120. It's also unlikely that a 3500 watt
genny would start most well pumps running on gasoline and even more unlikely
that it would start it with propane.
My 9 HP Honda struggles a little to start my pump. My 11 HP Cheap Chinese
generator hardly even notices it (gasoline on both).
> Maybe see if Princess Auto will give a refund - if it proves too
> small for your use ? They might surprise you.
> Good luck.
> Post your results here - for all our info.
> John T.
| |
| Daniel Who Wants to Know 2008-03-12, 3:25 am |
| "Boden" <boden@tidewater.net> wrote in message
news:fr53di02d8n@enews2.newsguy.com...
>
>
> I like propane as a fuel and am planning to convert my 4500 KW Generac to
> propane this summer. I have the conversion kit and am looking forward to
> doing it.
>
> I have a couple of observations though.
>
> In my case I come close to loading up my 4,500 watts generator at some
> times. The problem is largely imaginary current, but it's still a
> problem. Some of my loads have very poor power factors.
>
> Also, have you looked carefully at how big a propane tank you'll need to
> run this generator at the lowest temperature you'll encounter? In my
> case, at -20 F I need at a minimum a 420 lb vertical tank to avoid a
> freeze up due to auto-refrigeration.
>
> Boden
>
As you mentioned in another post Propane does contain less energy per gallon
so normally the engine would produce less horsepower running on it compared
to gasoline. The difference could be made up for if you found a way to port
and polish the engine along with upping the compression ratio to 12:1 or so
but then it would be propane and natural gas (methane) only and couldn't be
run on gasoline any more.
| |
| Vaughn Simon 2008-03-12, 9:25 am |
|
"Daniel Who Wants to Know" <danielthechskid@merrychristmasi.com> wrote in
message news:YIJBj.71961$yE1.47025@attbi_s21...
> As you mentioned in another post Propane does contain less energy per gallon
> so normally the engine would produce less horsepower running on it compared to
> gasoline. The difference could be made up for if you found a way to port and
> polish the engine along with upping the compression ratio to 12:1 or so but
> then it would be propane and natural gas (methane) only and couldn't be run on
> gasoline any more.
(You might also consider advancing the timing)
A generator converted to propane or NG from gasoline may or may not still put
out its rated power. It depends on how large the engine is relative to the
generator end. Most Onans are rated the same regardless of the fuel used. Onan
has not figured out a way to violate the laws of physics, they just use a
slightly larger engine.
Vaughn
| |
| ...........Rob 2008-03-12, 9:25 pm |
|
>
> =A0 =A0A generator converted to propane or NG from gasoline may or may not=
still put
> out its rated power. =A0It depends on how large the engine is relative to =
the
> generator end. =A0Most Onans are rated the same regardless of the fuel use=
d. =A0Onan
> has not figured out a way to violate the laws of physics, they just use a
> slightly larger engine.
>
> Vaughn
I've noticed the Honda\Yamaha 3000 watt (give or take) use a 5.5hp
engine size, this 2800 watt
(rated) uses a 6.5hp engine. Made me think sombody put a little
thought into the design of the
propane fuel for the gen. Princess auto have a great return policy,
no hassle. As been stated
here many times propane may be available when other fuels are
not..... Looking better and better,
May go down and actually touch on and see...........
=2E.........Rob
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