<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv=Content-Type content="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 12 (filtered medium)">
<style>
<!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.Section1
{page:Section1;}
-->
</style>
<!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang=EN-US link=blue vlink=purple>
<div class=Section1>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Hi Keith,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>That is my place. Hydro pond is both spring fed and fed by a small
seasonal brook, no pumping.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I figure approximately 50% to55% efficiency for a high
head micro-hydro turbine (Harris PM), not including, wire, batteries and
inverter losses. I do not know the efficiency of larger turbines. Check with
Canyon Industries (they advertise in Home Power). I’ve heard that they
are significantly higher in efficiency (before transmission losses).<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I have heard that at least one larger scale hydro facility in NY
State pumps back to the reservoir overnight at off peak rates, then releases
generation water during peak rate periods. Also, Hydro Quebec buys off peak
power from the U.S. grid when it’s dirt cheap to power Montreal overnight.
This saves some of their own water power for selling to the States
during peak periods. A nice money making deal for Quebec. So, your idea is
worth thinking about for regions such as Hawaii I believe.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Dave<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <b>On Behalf Of </b>Keith
Cronin<br>
<b>Sent:</b> Monday, August 24, 2009 2:43 PM<br>
<b>To:</b> RE-Wrenches<br>
<b>Subject:</b> [RE-wrenches] Solar and pumped hydro<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'>Hi<br>
<br>
Have any of you considered using PV to pump water to a holding area and
releasing it and capturing the kinetic energy via a pelton wheel/hydro?<br>
<br>
If so, what do we think are the efficiencies and value of doing such a project
are? Meaning, back of the napkin, PV is + - 77% efficient, minus "x"
to pump the water to "x" elevation and the net result of the hydro =
"____% efficient"<br>
<br>
It would be using the reservoir as the battery.<br>
<br>
There is approximately 300' of elevation from the PV system and water source to
the reservoir area.<br>
<br>
I recall about 15 years ago, I visited a member on this lists Vermont home and
he had a pond at the top of his property, but i don't recall how the source got
to the reservoir? Might have been naturally fed?<br>
<br>
Anyway, the premise is, as grid access becomes more difficult to do, as the
utility infrastructure gets saturated, what are our options for folks that want
PV, but are limited in how much they are allowed to connect to the grid,
without an interconnection study by a 3rd party to increase the comfort of the
utility to have more non firm resources on their grid. We are seeing this
happen here now and I was wondering if any of you have encountered this or are
anticipating this in your areas?</span><span style='font-size:10.0pt;
font-family:"Arial","sans-serif";color:#007F40'><br>
</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'><br>
Any suggestions, calcs, recommendations, feedback would be appreciated.</span><span
style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#007F40'> </span><span
style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><br>
<br>
Keith</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#007F40'><o:p></o:p></span></p>
</div>
</div>
</div>
</body>
</html>