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Article #2371Re: A bubble wall?
From: george
Date: Tue, 16 Apr 1996 00:00
Date: Tue, 16 Apr 1996 00:00
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2369 bytes
:> > So, led by this little child, let's all buy some glycerin, and try to invent :> > a bubble wall, eg two pieces of single-layer polycarbonate plastic with butyl :> > tape over a plastic 1x3" frame that can be filled between with bubbles at :> > night that emerge from a PVC pipe with a few holes immersed in a soapy :> > solution at the bottom, connected to a small aquarium air pump with a timer? :> > This could be very useful in a passive solar house, like Beadwall. Simple :> > movable insulation. During the day, the sun shines in on some thermal mass, :> > and at night the glazing fills up with bubbles, keeping the heat in. hmmm...the thermal conductivity of soap film isn't in my heat transfer text. I'm guessing its a reasonable conductor - it your "wall" is thin (like a double paned window) you wouldn't gain anything filling it with bubbles. If you had a thicker wall you might gain something assuming you could get the bubbles to stay put. Of course if your aim is to impress the neighbors go for it :-) -- george george@mech.seas.upenn.edu
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 107e5d,21c1cd819898d2eb X-Google-Attributes: gid107e5d,public X-Google-Thread: 10e415,21c1cd819898d2eb X-Google-Attributes: gid10e415,public X-Google-Thread: 1025ed,21c1cd819898d2eb X-Google-Attributes: gid1025ed,public X-Google-Thread: fb752,21c1cd819898d2eb X-Google-Attributes: gidfb752,public X-Google-Thread: 105eab,21c1cd819898d2eb X-Google-Attributes: gid105eab,public X-Google-Thread: 10607c,21c1cd819898d2eb X-Google-Attributes: gid10607c,public X-Google-Thread: 10eede,21c1cd819898d2eb X-Google-Attributes: gid10eede,public X-Google-Thread: 1159e3,21c1cd819898d2eb X-Google-Attributes: gid1159e3,public From: jeffe@red.seas.upenn.edu (george) Subject: Re: A bubble wall? Date: 1996/04/16 Message-ID: <4l16tg$n7s@netnews.upenn.edu> X-Deja-AN: 147858257 references: <4j45me$jmk@vu-vlsi.ee.vill.edu> <4kl3i4$rv2@vu-vlsi.ee.vill.edu> <bhoglund-1304961005320001@max7-147.hiwaay.net> <317405C0.789@netnet.net> organization: Mechanical Engineering x-fake-from: george@mech.seas.upenn.edu ( George Jefferson ) newsgroups: sci.energy,alt.energy.renewable,bit.listserv.geodesic,alt.architecture.alternative,pa.environment,sci.environment,alt.home.repair,sci.engr.heat-vent-ac,alt.solar.thermal