el sid question [RE-wrenches]

[Jay Peltz, Peltz Power]

<x-flowed>
Your free subscription is supported by today's sponsor:
-------------------------------------------------------------------
Need a Laptop? Get a Sony Vaio Laptop Free!
http://click.topica.com/caadtaFbz8Qcsbz9JC9a/ProductTestPanel
-------------------------------------------------------------------

Hi Brad thanks,

What about using 2 x 20 watt panels instead of 1 x 40 watt?

And I'm guessing that the 20v is a hard limit.  That could be a  
problem on some cold winter morniings here?

Are the smaller units more resistant to this?
I hook the smaller units in series or parallel?

My system (yet to be completed) will have 4 3x7' glass/copper  
collectors on it.  They will be below the tank and be around oh  
around 50' of piping away.

I'm going to use 3/4" pipe , combination of CPVC, and copper pipe.

   I've sized this system to produce much energy in the winter months.

I'm still working on a automatic covering system that will shade the  
panels when the tank gets hot enough.

thanks,

jay


On May 15, 2005, at 8:07 PM, bbassett at rockisland.com wrote:

> Your free subscription is supported by today's sponsor:
> -------------------------------------------------------------------
> Get both the MiFi XM Satellite Radio and an Apple iPod for Free!
> http://click.topica.com/caadtaJbz8QcsbAmaYia/ProductTestPanel
> -------------------------------------------------------------------
>
> Jay,
>
> I have an El Sid 20PV pump in my SDHW system. Keep in mind that it  
> takes
> 1.1 amps to get it started. I'm using a 30watt module so it takes  
> about
> 1/2 sun to start it. When we have partly hazy days sometimes it  
> doesn't
> start when I could be collecting a goodly amount of heat. Then when it
> does start I get a really hot slug of fluid through the system. I  
> don't
> think this is conducive to long glycol life. It keeps running until
> pretty low light once it gets going. It pumps fine at over 2gpm  
> through
> a single 4x10 collector and low restriction heat exchanger (coil in
> tank) with about 35% glycol. Dan did let me try out a circuit board he
> made to help with the startup, and it worked fine while it worked, but
> didn't work very long, and the electronics were exposed to being  
> touched
> and possibly easily damaged, so was not really a solution yet.
>
> So if you really wanted to use one I would couple it to a 40 watt  
> module
> or greater, making sure that it won't ever go over the 20 volt  
> limit for
> the pump. Good luck finding a 40 watt module, much less one with lower
> voltage! Maybe the fountain pump module AEE has would be a good match,
> hi amperage, low voltage 28 watt, although I prefer glass framed  
> modules
> for long life to match the heating collectors. I've had good luck with
> the smaller ElSid pumps, both PV and battery versions. I would  
> consider
> using two of the ElSid-10PV pump, even if it is expensive, and a  
> 30watt
> module. My experience with two Hartell pumps on one module is that it
> works very well. There's plenty of amps that starts one pump and then
> the other one starts immediately after, so you might get good low sun
> performance. I haven't tried this with two ElSid pumps, but give Dan a
> call and ask him what he thinks.
>
> I tried one of the new Laing DC pumps last year, and found that it
> didn't start on PV at all. It also made the most hideous wailing noise
> I've ever heard while sitting there doing nothing. I've heard that  
> they
> work with an LCB, but don't know how well. They also didn't seem to  
> have
> a clue about what is required for a PV direct pump (or much of  
> anything
> else), even though they advertise that these pumps can be used that  
> way.
>
> I just R&R a collector, for reroofing, that I installed about 15 years
> ago that had an early version of the brushless Hartell pump (before  
> the
> little pancake motor was used). The system had an old Solarex 10 watt
> module that tested OK still. It started with about 20% sun or less,  
> just
> barely turning over, but the warm fluid did come down the pipe! And  
> with
> good sun ran very nicely. It was quiet too. I wish I could get these
> again.
>
> Actually my favorite was an old tiny Laing pump (very efficient)  
> that I
> coupled to a 10 watt de-bladed brushless DC fan. It worked great,  
> but my
> epoxied together shaft didn't last very long. So this is not a hard  
> nut
> to crack, someone just needs to do it right.
>
> Brad
>
>
> jay peltz wrote:
>
>>
>> I am planning on using a el sid 20 watt version on a glycol 4 panel
>> system, off grid, array direct.
>>
>> Anybody know of any problems with this unit?
>>
>> thanks,
>>
>> jay
>>
>> peltz power
>>
>>
>>
>
> Your free subscription is supported by today's sponsor:
> -------------------------------------------------------------------
> Sign up today for a No Annual Fee Discover® Platinum Card and get
>
> 0% Intro APR on Purchases & Balance Transfers for 8 Months, Up to
> 2% Cashback Bonus® reward on your purchases & 100% fraud
> protection.
> http://click.topica.com/caadtrVbz8QcsbAmaYif/DiscoverCard
> -------------------------------------------------------------------
>
> - - - -
> To send a message: RE-wrenches at topica.com
>
> Archive of previous messages: http://lists.topica.com/lists/RE- 
> wrenches/read
>
> List rules & etiquette: www.mrsharkey.com/wrenches/etiquette.php
>
> Check out participant bios: www.mrsharkey.com/wrenches/
>
> Hosted by Home Power magazine
>
> Moderator: michael.welch at homepower.com
>
>
>

Your free subscription is supported by today's sponsor:
-------------------------------------------------------------------
Erase wrinkles without painful injections with Nexiderm SP.
Nexiderm SP is clinically proven to reduce wrinkles by 68% Click 
here to get your 30-day free supply.
http://click.topica.com/caadvf5bz8Qcsbz9JC9f/Nexiderm
-------------------------------------------------------------------

- - - -
To send a message: RE-wrenches at topica.com

Archive of previous messages: http://lists.topica.com/lists/RE-wrenches/read

List rules & etiquette: www.mrsharkey.com/wrenches/etiquette.php

Check out participant bios: www.mrsharkey.com/wrenches/

Hosted by Home Power magazine

Moderator: michael.welch at homepower.com
--^----------------------------------------------------------------
This email was sent to: michael.welch at homepower.com

EASY UNSUBSCRIBE click here: http://topica.com/u/?bz8Qcs.bz9JC9.bWljaGFl
Or send an email to: RE-wrenches-unsubscribe at topica.com

For Topica's complete suite of email marketing solutions visit:
http://www.topica.com/?p=TEXFOOTER
--^----------------------------------------------------------------



</x-flowed>