[RE-wrenches] Water Pumping 24/7

[Wesley Kennedy]

Hi Darryl,
I’d love to see that math on that.you mind sharing? 

-Wes
303-653-3073


> On Mar 27, 2022, at 1:27 PM, Darryl Thayer via RE-wrenches <re-wrenches at lists.re-wrenches.org> wrote:
> 
> 
> Hello, Sorry to be so late but I have been overloaded.  Just a note on physics of lifting water.  The calculation indicates if you pump 1 gallon per minute up 300 feet it required a water hp of 5 HP  
> Use this base number and good pumps are about 70% efficient.  If the flow rate is not 1 GPM adjust the HP accordingly.  For example, if you want to pump 10 GPM it requires 50 HP  or if you want to pump 10 Gallons / day it requires (50HP/ 24h 60min )requiring 0,035 HP..   
> Again I apologize for delay.   
> 
>> On Wed, Mar 16, 2022 at 1:33 AM William Miller <william at millersolar.com> wrote:
>> Hilton:
>> 
>> A valid point.  However in this region wells often do not recharge as well
>> as we might like.  In these cases, to meet gallons per day you have to pump
>> long and slow--more hours per day than the sun will be up.  That means of
>> course generator or battery storage.
>> 
>> The economics have shifted from when I started installing direct-DC water
>> pumping.  The money that is being spent today to provide commercial ag water
>> is beyond what I would have comprehended back then.  This means new
>> technology--and questions need to be asked, including considering battery
>> storage.
>> 
>> Thanks for your reply.
>> 
>> William
>> 
>> Miller Solar
>> 17395 Oak Road, Atascadero, CA 93422
>> 805-438-5600
>> www.millersolar.com
>> CA Lic. 773985
>> 
>> 
>> 
>> -----Original Message-----
>> From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On
>> Behalf Of Hilton Dier
>> Sent: Tuesday, March 15, 2022 6:56 PM
>> To: RE-wrenches at lists.re-wrenches.org
>> Subject: [RE-wrenches] Water Pumping 24/7
>> 
>> Here’s a lateral take on this. A 500 gallon poly water tank is far cheaper
>> than the batteries needed to fill it.
>> 
>> Years ago I rigged up a seasonal pump system for a man who had two ponds on
>> his property. The lower one was well fed by a spring but the upper one wasn’t.
>> I used a 200 watt DC piston pump and a couple of modules with a linear
>> current booster. A couple of breakers but no batteries. It just chugged away
>> quietly all (moderately sunny) day, filling the upper pond.
>> 
>> Using a positive displacement pump is key for minimizing power requirements.
>> At 300 feet that’s about 125 psi, which is not out of line for a piston
>> pump. Fill a big poly tank and pressurize it with a small DC diaphragm pump
>> if necessary.
>> 
>> Simple, efficient, cheap.
>> 
>> Hilton Dier III
>> Renewable Energy Design
>> Missisquoi River Hydro LLC
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