[Rhodes22-list] Dry Ice

[Gardner, Douglas L. (LNG-DAY)]

Bill, 
Beware! 

  CO2 is heavier than air, and will displace the oxygen in the cabin (and
cockpit!), at least below the level of the watertight portion of the hull.
For my boat, that means you could have reduced oxygen anywhere below the
gunnels of the boat.

You might want to reconsider the use of dry ice on the boat.

--Doug

  

-----Original Message-----
From: Bill Effros [mailto:bill@effros.com]
Sent: Wednesday, November 06, 2002 3:42 PM
To: R22 List
Subject: [Rhodes22-list] Dry Ice


I purchased a dry ice maker at the beginning of this season that could be of
interest to anyone thinking of short term cruising.

It cost $125, which I though was a bit pricey for what it is--little more
than a fitting for a CO2 tank, and a cloth sack that can be attached to the
fitting via a hose clamp.

However, it does work.  And a pound of dry ice in the top section of the ice
box will keep the bottom section as cold as a home refrigerator all day and
night with just a little effort.

CO2 is not expensive and can be purchased at welding supply companies.  The
tank must have a siphon.  That lets out 5 lb. tanks.  25 lb.s is the minimum
tank size.  The efficiency is 20-25%.  A 25 lb. tank will fit in the
lazarette, however, remember it weighs more than 25 lbs when full, and gets
lighter as you use the gas.

If you buy some dry ice before you start, and replenish as you go you could
probably stretch it out to a week of cruising if you are careful.  Some of
the dry ice would be stored along with food in coolers as Roger has
described in the past.

I don't know about the safety factor, however my boat is less than air
tight, and I have the pop-top up most of the time I'm on board.

Bill Effros
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