Dennis — have you looked at the Frigoboat water-cooled systems?  The keel 
cooler means no pump and no jellyfish issues.

Fred Street -- Minneapolis
S/V Oceanis (1979 C&C Landfall 38) -- on the hard in Bayfield, WI   :^(

On Dec 20, 2013, at 4:06 PM, Dennis C. <capt...@yahoo.com> wrote:

> I seem to recall reading a testimonial that the Isotherm SP units will cool 
> even with the boat on the hard.  Tells me that jellyfish might not be an 
> issue.  What's the heat transfer coefficient for a jellyfish, anyway?
> 
> I looked hard at the heat rejection issue because the water temperature on 
> the bayou where I keep Touche' can exceed 85 F at times.  I'm thinking the 
> refrigerant is 220-250 F in the heat transfer coil in the thruhull.  That's 
> quite a bit of temperature differential for heat rejection.
> 
> I like the idea of no cooling fan or cooling water pump for both energy and 
> reliability.
> 
> Dennis C.
> Touche' 35-1 #83
> Mandeville, LA

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