Posted by sspence on May 11, 2009, 7:02 pm
A few years ago we invested in a high quality dc pump for our offgrid
water system. It was recommended we go with a solar force piston pump
with a 12v motor. Although it is a fine pump, and is much more
efficient
than our old jet pump, it was well over $1000. Piston pumps were well
known 50 years ago, and can last a century if taken care of. We have
replaced the rubbers and packing in a few of the old ones, but parts
are
getting hard to find.
Read more at
http://www.green-trust.org/wordpress/2009/05/11/energy-efficient-water-pumps/
Steve Spence
http://www.green-trust.org
Posted by Morris Dovey on May 11, 2009, 7:13 pm
sspence wrote:
> A few years ago we invested in a high quality dc pump for our offgrid
> water system. It was recommended we go with a solar force piston
> pump with a 12v motor. Although it is a fine pump, and is much more
> efficient than our old jet pump, it was well over $1000. Piston pumps
> were well known 50 years ago, and can last a century if taken care
> of. We have replaced the rubbers and packing in a few of the old
> ones, but parts are getting hard to find.
>
> Read more at
> http://www.green-trust.org/wordpress/2009/05/11/energy-efficient-water-pumps/
Hand crank or pedal at 300 - 400 RPM? Wow.
--
Morris Dovey
DeSoto Solar
DeSoto, Iowa USA
http://www.iedu.com/DeSoto/
Posted by sspence on May 11, 2009, 7:18 pm
> sspence wrote:
> > A few years ago we invested in a high quality dc pump for our offgrid
> > water system. It was recommended we go with a solar force piston
> > pump with a 12v motor. Although it is a fine pump, and is much more
> > efficient than our old jet pump, it was well over $1000. Piston pumps
> > were well known 50 years ago, and can last a century if taken care
> > of. We have replaced the rubbers and packing in a few of the old
> > ones, but parts are getting hard to find.
> > Read more at
> >http://www.green-trust.org/wordpress/2009/05/11/energy-efficient-wate ...
> Hand crank or pedal at 300 - 400 RPM? Wow.
> --
> Morris Dovey
> DeSoto Solar
> DeSoto, Iowa USAhttp://www.iedu.com/DeSoto/
Gearing my friend, gearing. 50 rpm at the pedal, 300 at the pump, 6:1
pulley ratio.
Steve Spence
http://www.green-trust.org
Posted by Morris Dovey on May 11, 2009, 9:13 pm
sspence wrote:
>> sspence wrote:
>>> A few years ago we invested in a high quality dc pump for our offgrid
>>> water system. It was recommended we go with a solar force piston
>>> pump with a 12v motor. Although it is a fine pump, and is much more
>>> efficient than our old jet pump, it was well over $1000. Piston pumps
>>> were well known 50 years ago, and can last a century if taken care
>>> of. We have replaced the rubbers and packing in a few of the old
>>> ones, but parts are getting hard to find.
>>> Read more at
>>> http://www.green-trust.org/wordpress/2009/05/11/energy-efficient-wate ...
>> Hand crank or pedal at 300 - 400 RPM? Wow.
>
> Gearing my friend, gearing. 50 rpm at the pedal, 300 at the pump, 6:1
> pulley ratio.
I think I might enjoy watching the last 60 seconds of a ten-minute video
of that. :)
--
Morris Dovey
DeSoto Solar
DeSoto, Iowa USA
http://www.iedu.com/DeSoto/
Posted by sspence on May 11, 2009, 9:48 pm
> sspence wrote:
> >> sspence wrote:
> >>> A few years ago we invested in a high quality dc pump for our offgrid
> >>> water system. It was recommended we go with a solar force piston
> >>> pump with a 12v motor. Although it is a fine pump, and is much more
> >>> efficient than our old jet pump, it was well over $1000. Piston pumps
> >>> were well known 50 years ago, and can last a century if taken care
> >>> of. We have replaced the rubbers and packing in a few of the old
> >>> ones, but parts are getting hard to find.
> >>> Read more at
> >>>http://www.green-trust.org/wordpress/2009/05/11/energy-efficient-wate ...
> >> Hand crank or pedal at 300 - 400 RPM? Wow.
> > Gearing my friend, gearing. 50 rpm at the pedal, 300 at the pump, 6:1
> > pulley ratio.
> I think I might enjoy watching the last 60 seconds of a ten-minute video
> of that. :)
> --
> Morris Dovey
> DeSoto Solar
> DeSoto, Iowa USAhttp://www.iedu.com/DeSoto/
3 or 4 minutes on the exercise bike a few times a day is all that's
necessary. it's easy. You can see it at http://tech.groups.yahoo.com/group/=
apptechdesign/
XML site map
> water system. It was recommended we go with a solar force piston
> pump with a 12v motor. Although it is a fine pump, and is much more
> efficient than our old jet pump, it was well over $1000. Piston pumps
> were well known 50 years ago, and can last a century if taken care
> of. We have replaced the rubbers and packing in a few of the old
> ones, but parts are getting hard to find.
>
> Read more at
> http://www.green-trust.org/wordpress/2009/05/11/energy-efficient-water-pumps/