<div dir="ltr"><div class="gmail_default" style="font-family:times new roman,serif;font-size:large">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 </div><div class="gmail_default" style="font-family:times new roman,serif;font-size:large">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.. </div><div class="gmail_default" style="font-family:times new roman,serif;font-size:large">Again I apologize for delay. </div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Mar 16, 2022 at 1:33 AM William Miller <<a href="mailto:william@millersolar.com">william@millersolar.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hilton:<br>
<br>
A valid point. However in this region wells often do not recharge as well<br>
as we might like. In these cases, to meet gallons per day you have to pump<br>
long and slow--more hours per day than the sun will be up. That means of<br>
course generator or battery storage.<br>
<br>
The economics have shifted from when I started installing direct-DC water<br>
pumping. The money that is being spent today to provide commercial ag water<br>
is beyond what I would have comprehended back then. This means new<br>
technology--and questions need to be asked, including considering battery<br>
storage.<br>
<br>
Thanks for your reply.<br>
<br>
William<br>
<br>
Miller Solar<br>
17395 Oak Road, Atascadero, CA 93422<br>
805-438-5600<br>
<a href="http://www.millersolar.com" rel="noreferrer" target="_blank">www.millersolar.com</a><br>
CA Lic. 773985<br>
<br>
<br>
<br>
-----Original Message-----<br>
From: RE-wrenches [mailto:<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" target="_blank">re-wrenches-bounces@lists.re-wrenches.org</a>] On<br>
Behalf Of Hilton Dier<br>
Sent: Tuesday, March 15, 2022 6:56 PM<br>
To: <a href="mailto:RE-wrenches@lists.re-wrenches.org" target="_blank">RE-wrenches@lists.re-wrenches.org</a><br>
Subject: [RE-wrenches] Water Pumping 24/7<br>
<br>
Here\u2019s a lateral take on this. A 500 gallon poly water tank is far cheaper<br>
than the batteries needed to fill it.<br>
<br>
Years ago I rigged up a seasonal pump system for a man who had two ponds on<br>
his property. The lower one was well fed by a spring but the upper one wasn\u2019t.<br>
I used a 200 watt DC piston pump and a couple of modules with a linear<br>
current booster. A couple of breakers but no batteries. It just chugged away<br>
quietly all (moderately sunny) day, filling the upper pond.<br>
<br>
Using a positive displacement pump is key for minimizing power requirements.<br>
At 300 feet that\u2019s about 125 psi, which is not out of line for a piston<br>
pump. Fill a big poly tank and pressurize it with a small DC diaphragm pump<br>
if necessary.<br>
<br>
Simple, efficient, cheap.<br>
<br>
Hilton Dier III<br>
Renewable Energy Design<br>
Missisquoi River Hydro LLC<br>
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