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Article #2364Re: A bubble wall?
From: David Davis
Date: Mon, 22 Apr 1996 00:00
Date: Mon, 22 Apr 1996 00:00
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Nick Pine wrote: > > george <jeffe@red.seas.upenn.edu> wrote: > > >...the thermal conductivity of soap film isn't in my heat transfer text. > > I wonder what heat transfer text you are using. > > I guess it's like a very thin film of water, or anything else, eg plastic > film, as far as stopping convection, and good enough to stop some of the > IR radiation, ie the bubble wall would ideally be thick enough or opaque > enough slow down IR losses considerably. > > >I'm guessing its a reasonable conductor - > > The wall itself, yes, but the air inside the bubble is less conductive. > > >it your "wall" is thin (like a double paned window) you wouldn't gain > >anything filling it with bubbles. > > Can you define "anything"? :-) > > >If you had a thicker wall you might gain something > >assuming you could get the bubbles to stay put. > > That's the idea... > > Nick I have to agree with George. Logic tells me you have provided numerous small wet paths for energy transfer via the bubble walls. Before the bubbles transfer relied on convection in the air in the space. David davis davisd@ucs.orst.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: 10eede,21c1cd819898d2eb X-Google-Attributes: gid10eede,public X-Google-Thread: 10607c,21c1cd819898d2eb X-Google-Attributes: gid10607c,public X-Google-Thread: 105eab,21c1cd819898d2eb X-Google-Attributes: gid105eab,public X-Google-Thread: 1025ed,21c1cd819898d2eb X-Google-Attributes: gid1025ed,public X-Google-Thread: 1159e3,21c1cd819898d2eb X-Google-Attributes: gid1159e3,public X-Google-Thread: fb752,21c1cd819898d2eb X-Google-Attributes: gidfb752,public From: David Davis <davisd@ucs.orst.edu> Subject: Re: A bubble wall? Date: 1996/04/22 Message-ID: <317BCCC0.4539@ucs.orst.edu> X-Deja-AN: 150840413 references: <4j45me$jmk@vu-vlsi.ee.vill.edu> <bhoglund-1304961005320001@max7-147.hiwaay.net> <317405C0.789@netnet.net> <4l16tg$n7s@netnews.upenn.edu> <4l1ee1$5li@vu-vlsi.ee.vill.edu> content-type: text/plain; charset=us-ascii organization: Security Services / Oregon State University mime-version: 1.0 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 x-mailer: Mozilla 2.01Gold (Win95; I)