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

[Kevin Rose]

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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