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An electric heating pad setup is available from Patco, Inc. www.patcoinc.com under the name Aqua Heat. They say this works with either a wetsuit or a drysuit (which requires a thru-suit connection similar to a P-valve connection). Has anyone tried this? > -----Original Message----- > From: Don Burke [mailto:donburke56@ne*.ne*] > Sent: Monday, February 12, 2001 3:24 PM > To: Matthias Voss > Cc: techdiver@aquanaut.com > Subject: Re: heated watersuit > > > Hi Matthias, > > It's good to have the list back up so I can hear from you. > > From: Matthias Voss <mat.voss@t-*.de*> > > > I do not know this suit. > > However, at the boot fair Düsseldorf there was a suit heated by a > > 10amphour batterypack, where the heatgenerating fibers were maid out of > > carbon filaments. > > That is pretty much the way this thing works. The suit looks like a > diveskin and is made of fleeced PolyPro/Lycra and nylon coated > neoprene and > has a heating element in the spine. I get the impression that it is very > thin, which in the case of neoprene translates to very expensive. The > battery pack is six volts and weighs about three pounds. The website had a > capacity for it which I don't recall. > > The pack connects to the suit, has a temperature control, and is available > with several mounting options. > How it does that without punching a hole in the drysuit or making a seal > into a leak is a mystery to me. > > > There was also a suit who's designer claimed a capability of chemically > > storing latent enrgy and rendering heat in the very moment the > > temperature dropped below a trigger point. You may have seen this very > > design with cars, where the cooling system serves to heat > > natriumsomething crystals, which in turn give this energy back on > > demand. > > If you could have a material with a melting point around 90 degrees and > enough specific heat, you could wear a vest of the stuff under > your drysuit > and go the first part of the dive on sensible heat and the rest > of the dive > on the latent heat given off as the material solidifies. I know of no > material with a high enough specific heat to do that. > > Every once in a while I see a report of someone using a couple of those > chemical heat packs inside a drysuit. The reason I see the report is that > the packs supposedly got salt water on them and burned the hell out of the > diver. > I have no idea if those packs actually do that. I'll have to > dunk one in a > bucket of seawater in the backyard one day and find out. > > The thing about this rig that got my attention was that the suits put no > heat on the head, hands, or feet. The heating element is at the spine. > > I _always_ feel the cold in my feet, hands, or head. > The only time my spine is the first part of me to get cold is when I am > changing the oil in my truck in my driveway in February. :) > > Don > > > Shop online without a credit card > http://www.rocketcash.com > RocketCash, a NetZero subsidiary > -- > Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. > Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. > -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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