[PUP] CENTRAL AIR CHILLED WATER SYSTEM VERSUS STAND-ALONE UNITS

[Paul Goyette]

On Sat, 9 Jun 2007, Jon Boy aka:TrawlerGuy wrote:

> --If I, like you, were designing from scratch today I would still 
> consider a chiller system but it would definitely be a multi zone 
> system with 2 or more independent systems, depending on boat 
> size/layout etc. I.e. our boat has two staterooms in the bow, engine 
> room in ctr, and master berth in Stern. Then the salon/galley/dining 
> area, and the pilothouse. If I were designing a boat today, I would 
> also attempt to make, as much as possible, a DC boat in a 12/24VDC 
> system. That is to say utilize direct DC power as much as possible and 
> then utilize inverter generated AC as much as possible.

An alternative is to have a system with multiple, smaller compressor 
systems.  I had such a system on Gentle Wind.  With an appropriate 
control board, it was able to run just one chiller when possible, but 
turned on the 2nd one if there was a substantial temp difference in
chilled water vs return water.  The single compressor was more than 
adequate to run heat exchangers in the staterooms, but of course as
soon as we started to cool the salon and pilot house, we would need
the 2nd unit.


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