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Please Define efficiency with respect to this comment: "
Though I think you may mean electric resistance (not PVs) PVs, depending on the type, are more like 10% efficient, not 100%." <div>Source energy is about 3:1 if the source is an oil-fired power plant. If it's the Sun, it's less than 10% because PV's are still very inefficient; despite decades of empty promises.</div><div>Regarding this comment "<span style="font-size: 10pt; ">Why don't you work on a little energy efficiency?</span><span style="font-size: 10pt; ">"; my invention is being used </span><span style="font-size: 10pt; "> to recycle energy from wastewater </span><span style="font-size: 10pt; ">in thousands of homes --including mine; Army Barracks, College Dorms, restaurants, etc. . Do I get credit for that?</span></div><div>Carmine</div><div>gfxtechnology.com<br><br><div><div id="SkyDrivePlaceholder"></div>> Date: Tue, 20 Mar 2012 19:42:07 -0400<br>> From: larencorie@axilar.net<br>> To: greenbuilding@lists.bioenergylists.org<br>> Subject: Re: [Greenbuilding] is it ever sensible to use PV to heat water?<br>> <br>> From: Carmine Vasile <gfx-ch@msn.com><br>> <br>> > Since a PV system is nearly 100% efficient for electric<br>> > space & water heating,<br>> <br>> Hi Carmine;<br>> <br>> Though I think you may mean electric resistance (not PVs)<br>> PVs, depending on the type, are more like 10% efficient, not 100%<br>> <br>> > We live in an all-electric house and use about 20 MWh/yr.<br>> <br>> Yikes! That is about 17 time as much as I use, and I don't<br>> use any fossil fuel either, in a very cold climate (that<br>> includes for lawn care and clearing snow in a very snowy<br>> climate). You use nearly double what the average American<br>> household uses. Surely you have an interest in reducing that.<br>> <br>> > Our average monthly bill is $237 -- which is a<br>> > lot less than my neighbor's oil + electric bill.<br>> <br>> Think about how nice it would be to only have<br>> to pay about $200 less than that, every month.<br>> IIRC you do not live in a very cold climate.<br>> <br>> > Unfortunately, our local utility will not offer rebates<br>> > for a ground-mounted 20 MWy PV array and our roof is<br>> > too small to fit 20 MHw worth of PV panels.<br>> <br>> Why don't you work on a little energy efficiency?<br>> It should be easy to reduce your usage by 50-80%<br>> Your household is virtually hemoraging energy. It<br>> is bound to cause Summer overheating. That rate<br>> of usage is equal to about 7800BTU/hr, about 1-1/2<br>> time as much heat as runnng the largest plug-in<br>> electric heater 24/7/52<br>> <br><br></div></div> </div></body>
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