MarshallE wrote:
Hi,

What is the normal metal tubing used for keel coolers and how long should it
last?

I am having a heck of a time locating a seawater condenser and have about
decided to make from scratch.

I want to A/C using 5 tons for my boat.

thanks for help and opinions,

Marshall


I don't think you can manufacture a Keel Cooler condenser for a five
ton air conditioning unit that will be as good as the one you could
buy. Keel coolers are commonly used on boats larger than 50 feet. When
refrigeration or A/C systems use water as a condenser heat removal
medium an extra device is needed in refrigerant circuit to control
temperature of low side pressure gas . I would inform Unico of your
intensions on water cooling their unit, so they can add a hot gas
bypass valve if it is to be cooled by a keel cooler. If you plan on a
pumped water cooled condenser then you can add a water temperature
regulating valve to condenser water line.

The size of any type of condenser is based on system tonnage.
Seawater condensers are available from most A/C and refrigeration
suppliers like United Refrigeration.
For keel coolers there are several companies that advertise in Trade A
Boat or National Fisherman magazine.