AC circulator vs. PV driven DC [RE-wrenches]

Tom Lane, Energy Conservation Services tom at ecs-solar.com
Wed Apr 9 17:22:51 PDT 2003


you would need 6 hartell pumps each with a 25 watt module to get the  proper
flow rate  three  pumps in parallel flowing trough a second row all parallel
branches in tree quarter inch pipe  witth joing flow to at least one inch
headered  collectors two parallel branches of 5 collectors each with three
quarter pipe  all piping in one and a quarter inc pipe  gator tom-----
From: "Kevin Rose" <Krose at nycap.rr.com>
To: <RE-wrenches at topica.com>
Sent: Wednesday, April 09, 2003 7:50 PM
Subject: Re: AC circulator vs. PV driven DC [RE-wrenches]


> FYI-Kevin is at a conference this week.  Will return on Monday.
> ----- Original Message -----
> From: "Peter Talmage" <ptalmage at yahoo.com>
> To: <RE-wrenches at topica.com>
> Sent: Wednesday, April 09, 2003 7:14 PM
> Subject: AC circulator vs. PV driven DC [RE-wrenches]
>
>
> > I am designing a solar heating system which will use
> > 10  4'x10'collectors. I had planned to use a single AC
> > pump operated by a differential controller. The system
> > uses antifreeze so there is only modest head to
> > overcome. My customer likes the reliability of a DC
> > pump driven by a PV. I usually do this with small
> > systems, but this one would need 4 Hartell pumps to
> > get adequate flow, considering head loss. Anyone have
> > any thoughts ?  Thanks.
> >
> > Peter
> >
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