| Topic: |
Science > Physics |
| User: |
"acr[]mion" |
| Date: |
08 Sep 2004 06:31:32 PM |
| Object: |
Wearable cooling |
I'm currently working on my final design project at uni - designing a
wearable cooling device for very humid conditions (e.g crowded rock
concert), which would be worn on the wrist. I'm proposing to use an
umbilical system, which means (from what I ..umm.. researched) that i
need a reservoir, pump, cooling device, heat sink, power source...
From what I understand, the temperature of the device needs to be
kept above the dew point to minimise condensation. My challenge is to
somehow fit all that inside a wrist band/cuff and to use a motor
(Wellington Motors - they are special) somewhere in the device. The
other option that I have is using a series of inbuilt Sunon mini-fans
(8mm square). Being a design student, I have a very limited knowledge
of the issues involved. And since my understanding of practical
issues regarding physics is severely underdeveloped, I was wondering
if anyone could provide me with some advice. :?
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| User: "Name" |
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| Title: Re: Wearable cooling |
08 Sep 2004 07:10:52 PM |
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"acr[]mion" <drop_dead333@hotmail-dot-com.no-spam.invalid> wrote in message
news:413f9654$1_2@127.0.0.1...
I'm currently working on my final design project at uni - designing a
wearable cooling device for very humid conditions (e.g crowded rock
concert), which would be worn on the wrist. I'm proposing to use an
umbilical system, which means (from what I ..umm.. researched) that i
need a reservoir, pump, cooling device, heat sink, power source...
From what I understand, the temperature of the device needs to be
kept above the dew point to minimise condensation. My challenge is to
somehow fit all that inside a wrist band/cuff and to use a motor
(Wellington Motors - they are special) somewhere in the device. The
other option that I have is using a series of inbuilt Sunon mini-fans
(8mm square). Being a design student, I have a very limited knowledge
of the issues involved. And since my understanding of practical
issues regarding physics is severely underdeveloped, I was wondering
if anyone could provide me with some advice. :?
Need to know the range of cooling provided, 95 @ 90% humidity, cool person
down to "Comfortable"?
you will probably freeze his wrist off.
You may need a cart for the battery.
If you go for evaporative cooling, it works poorly in humid conditions.
A physically realizable solution may not be available.
Get a book on air conditioning, or refegriation and scale it down, if
possible.
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| User: "Greysky" |
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| Title: Re: Wearable cooling |
08 Sep 2004 11:50:06 PM |
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"acr[]mion" <drop_dead333@hotmail-dot-com.no-spam.invalid> wrote in message
news:413f9654$1_2@127.0.0.1...
I'm currently working on my final design project at uni - designing a
wearable cooling device for very humid conditions (e.g crowded rock
concert), which would be worn on the wrist. I'm proposing to use an
umbilical system, which means (from what I ..umm.. researched) that i
need a reservoir, pump, cooling device, heat sink, power source...
From what I understand, the temperature of the device needs to be
kept above the dew point to minimise condensation. My challenge is to
somehow fit all that inside a wrist band/cuff and to use a motor
(Wellington Motors - they are special) somewhere in the device. The
other option that I have is using a series of inbuilt Sunon mini-fans
(8mm square). Being a design student, I have a very limited knowledge
of the issues involved. And since my understanding of practical
issues regarding physics is severely underdeveloped, I was wondering
if anyone could provide me with some advice. :?
You're aiming to cool off the wrong part of the body. Ideally you want your
device to come into contact with a large surface area and close capillary
proximity to blood. Design the cooling device inside a scrotal/athletic cup
and you will gain max body cooling even for a relatively small temp
difference. You could also market your device as a sperm 'supercharger'
since the little buggers like the air conditioning... For the female
version, design the same thing into a bra...
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| User: "" |
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| Title: Re: Wearable cooling |
09 Sep 2004 05:50:09 AM |
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In article <2iR%c.17766$vg2.12781@newssvr29.news.prodigy.com>,
"Greysky" <greyskynospam@sbcglobal.net> wrote:
"acr[]mion" <drop_dead333@hotmail-dot-com.no-spam.invalid> wrote in
message
news:413f9654$1_2@127.0.0.1...
I'm currently working on my final design project at uni - designing a
wearable cooling device for very humid conditions (e.g crowded rock
concert), which would be worn on the wrist. I'm proposing to use an
umbilical system, which means (from what I ..umm.. researched) that i
need a reservoir, pump, cooling device, heat sink, power source...
From what I understand, the temperature of the device needs to be
kept above the dew point to minimise condensation. My challenge is to
somehow fit all that inside a wrist band/cuff and to use a motor
(Wellington Motors - they are special) somewhere in the device. The
other option that I have is using a series of inbuilt Sunon mini-fans
(8mm square). Being a design student, I have a very limited knowledge
of the issues involved. And since my understanding of practical
issues regarding physics is severely underdeveloped, I was wondering
if anyone could provide me with some advice. :?
You're aiming to cool off the wrong part of the body. Ideally you want
your
device to come into contact with a large surface area and close capillary
proximity to blood. Design the cooling device inside a scrotal/athletic
cup
and you will gain max body cooling even for a relatively small temp
difference. You could also market your device as a sperm 'supercharger'
since the little buggers like the air conditioning... For the female
version, design the same thing into a bra...
No female will wear that. Too fucking cold. The male version
would be useful to ensure that the appendage is tied in a knot.
/BAH
/BAH
Subtract a hundred and four for e-mail.
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| User: "Uncle Al" |
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| Title: Re: Wearable cooling |
08 Sep 2004 07:30:56 PM |
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"acr[]mion" wrote:
I'm currently working on my final design project at uni - designing a
wearable cooling device for very humid conditions (e.g crowded rock
concert), which would be worn on the wrist. I'm proposing to use an
umbilical system, which means (from what I ..umm.. researched) that i
need a reservoir, pump, cooling device, heat sink, power source...
Pour some water over your head.
From what I understand, the temperature of the device needs to be
kept above the dew point to minimise condensation. My challenge is to
somehow fit all that inside a wrist band/cuff and to use a motor
(Wellington Motors - they are special) somewhere in the device.
Pump some water over your head.
The
other option that I have is using a series of inbuilt Sunon mini-fans
(8mm square). Being a design student, I have a very limited knowledge
of the issues involved. And since my understanding of practical
issues regarding physics is severely underdeveloped, I was wondering
if anyone could provide me with some advice. :?
KISS - Keep It Simple, Stupid. Peltier cooler. Pump to cool the hot
side.
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz.pdf
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| User: "acr[]mion" |
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| Title: re:Wearable cooling |
09 Sep 2004 12:29:45 AM |
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...Yeah... I wish I could design something asinine, impractical but
funny... ..Just as a concept... Alas, my degree depends on this
project... :roll:
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| User: "" |
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| Title: re:Wearable cooling |
09 Sep 2004 05:55:18 AM |
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In article <413fea49$1_1@127.0.0.1>,
drop_dead333@hotmail-dot-com.no-spam.invalid (acr[]mion) wrote:
...Yeah... I wish I could design something asinine, impractical but
funny... ..Just as a concept... Alas, my degree depends on this
project... :roll:
hmm... Who gets the patent rights? It sure smells like a prof
who thought that getting his four years' worth of CS degree
kiddies to write a compiler would make him money.
I don't see how you can make each component of a tightly packed
crowd of exhuberant kids be self-cooling. That heat has to
go somewhere and it can't be transferred to the next person.
It can't go down; so it would have to go up. That won't work
if there are mooshers.
If the device has to be worn in a crowd, then you first have
figure out where you're going to put the excess heat...I would
think.
/BAH
Subtract a hundred and four for e-mail.
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| User: "acr[]mion" |
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| Title: Re: re:Wearable cooling |
10 Sep 2004 09:30:06 PM |
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Anonymouswrote:
In article <41417460$1_1@127.0.0.1>,
drop_dead333@hotmail-dot-com.no-spam.invalid (acr[]mion) wrote:
My own moshing experience over the years inspired me to choose this
project, so I'm somewhat aware of physiological issues involved.
The
umbilical system will be completely internal.
Like the blood supply?
.. What I'm proposing is a
wrist band (or a choker style collar) with exclusively internal
componentry: capillary system with coolant fluid in it, pump that
enables fluid circulation, peltier(?) to cool the fluid....
Have you done any tests on yourself to measure how much cooling
you'll have to do.
Somehow I need ot get energy from somewhere to power the damn
thing.
Sigh! If you're going to plan the damned project bassackwards, use
the energy of the person who is jumping up and down. Once upon
a time, sewing machines were powered by the foot.
I have to use a motor in there somewhere.. ...So I'll have my
self-generating motor... I have to figure out the most effective
type of motion that will activate the generator. The generator is
for... ...ummm...
You still have the problem of where you are going to vent the heat.
Are you going to vent it to the person next to you who is also
venting heat from his device onto you? You can't vent it towards
the floor because then you'll have to cool that heat repeatedly (heat
rises).
/BAH
Subtract a hundred and four for e-mail.[/quote:66140efc18]
I've only done some primitive cooling tests... ...Can't say I managed
to get much data out of them. Most of my information came from
existing cooling products.
With regards to power generation, I am proposing to use kinetic
energy. I'm in the process of trying to figure out the range of
movements that the device would be exposed to. ....Oscillating?
Centrifugal? ...Bahhh.... :?
Unless heat is conducted directly to the nearest object, it usually
rises up. So if it's an indoor event, the heat would rise up towards
the air conditioning unit. If it's an outdoor event, the heat would
be dispersed by wind.
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| User: "Richard Henry" |
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| Title: Re: re:Wearable cooling |
11 Sep 2004 02:53:17 AM |
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"acr[]mion" <drop_dead333@hotmail-dot-com.no-spam.invalid> wrote in message
news:4142632e$1_1@127.0.0.1...
Unless heat is conducted directly to the nearest object, it usually
rises up. So if it's an indoor event, the heat would rise up towards
the air conditioning unit. If it's an outdoor event, the heat would
be dispersed by wind.
Step outside tomorrow at noon. Feel the heat of the sun? Is that heat
rising up?
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| User: "acr[]mion" |
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| Title: re:Wearable cooling |
08 Sep 2004 08:31:51 PM |
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From what I researched, it is possible to reduce the body temperature
by cooling the pulse points (hence the wrist). I can't use
evaporative cooling due to the high humidity. And the cooling has to
stay above due point to minimise condensation, as that would cause
discomfort and reduce efficiency of the device. The motor that I
have to use (www.wdtl.com) doubles up as a generator. But I don't
know how to work out the amount of power required and the size of the
motor. :?
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| User: "" |
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| Title: re:Wearable cooling |
09 Sep 2004 05:47:26 AM |
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In article <413fb287$1_2@127.0.0.1>,
drop_dead333@hotmail-dot-com.no-spam.invalid (acr[]mion) wrote:
From what I researched, it is possible to reduce the body temperature
by cooling the pulse points (hence the wrist).
Have you tested it? If I get overheated, I run cool water over
my wrists for a minute or two; then I'm fine. Try an ice cube.
Take your temperature. Endure the pain. Pay attention to
these painful moments. One can get too cool.
<snip>
/BAH
Subtract a hundred and four for e-mail.
.
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| User: "Gregory L. Hansen" |
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| Title: Re: Wearable cooling |
08 Sep 2004 08:12:08 PM |
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In article <413f9654$1_2@127.0.0.1>,
acr[]mion <drop_dead333@hotmail-dot-com.no-spam.invalid> wrote:
I'm currently working on my final design project at uni - designing a
wearable cooling device for very humid conditions (e.g crowded rock
concert), which would be worn on the wrist. I'm proposing to use an
umbilical system, which means (from what I ..umm.. researched) that i
need a reservoir, pump, cooling device, heat sink, power source...
From what I understand, the temperature of the device needs to be
kept above the dew point to minimise condensation. My challenge is to
somehow fit all that inside a wrist band/cuff and to use a motor
(Wellington Motors - they are special) somewhere in the device. The
other option that I have is using a series of inbuilt Sunon mini-fans
(8mm square). Being a design student, I have a very limited knowledge
of the issues involved. And since my understanding of practical
issues regarding physics is severely underdeveloped, I was wondering
if anyone could provide me with some advice. :?
A number of those sorts of devices already exist. I can't remember much
specific off-hand, but maybe knowing there's something to look for would
help. I think ice and cold packs are typically used.
--
"Are those morons getting dumber or just louder?" -- Mayor Quimby
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| User: "acr[]mion" |
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| Title: Re: re:Wearable cooling |
10 Sep 2004 04:31:12 AM |
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My own moshing experience over the years inspired me to choose this
project, so I'm somewhat aware of physiological issues involved. The
umbilical system will be completely internal. What I'm proposing is a
wrist band (or a choker style collar) with exclusively internal
componentry: capillary system with coolant fluid in it, pump that
enables fluid circulation, peltier(?) to cool the fluid....
Somehow I need ot get energy from somewhere to power the damn thing.
I have to use a motor in there somewhere.. ...So I'll have my
self-generating motor... I have to figure out the most effective
type of motion that will activate the generator. The generator is
for... ...ummm...
Posted Via Usenet.com Premium Usenet Newsgroup Services
----------------------------------------------------------
** SPEED ** RETENTION ** COMPLETION ** ANONYMITY **
----------------------------------------------------------
http://www.usenet.com
.
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| User: "" |
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| Title: Re: re:Wearable cooling |
10 Sep 2004 04:25:34 AM |
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In article <41417460$1_1@127.0.0.1>,
drop_dead333@hotmail-dot-com.no-spam.invalid (acr[]mion) wrote:
My own moshing experience over the years inspired me to choose this
project, so I'm somewhat aware of physiological issues involved. The
umbilical system will be completely internal.
Like the blood supply?
.. What I'm proposing is a
wrist band (or a choker style collar) with exclusively internal
componentry: capillary system with coolant fluid in it, pump that
enables fluid circulation, peltier(?) to cool the fluid....
Have you done any tests on yourself to measure how much cooling
you'll have to do.
Somehow I need ot get energy from somewhere to power the damn thing.
Sigh! If you're going to plan the damned project bassackwards, use
the energy of the person who is jumping up and down. Once upon
a time, sewing machines were powered by the foot.
I have to use a motor in there somewhere.. ...So I'll have my
self-generating motor... I have to figure out the most effective
type of motion that will activate the generator. The generator is
for... ...ummm...
You still have the problem of where you are going to vent the heat.
Are you going to vent it to the person next to you who is also
venting heat from his device onto you? You can't vent it towards
the floor because then you'll have to cool that heat repeatedly (heat
rises).
/BAH
Subtract a hundred and four for e-mail.
.
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| User: "Richard Henry" |
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| Title: Re: re:Wearable cooling |
10 Sep 2004 09:06:12 AM |
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<jmfbahciv@aol.com> wrote in message
news:4141862f$0$6903$61fed72c@news.rcn.com...
In article <41417460$1_1@127.0.0.1>,
drop_dead333@hotmail-dot-com.no-spam.invalid (acr[]mion) wrote:
My own moshing experience over the years inspired me to choose this
project, so I'm somewhat aware of physiological issues involved. The
umbilical system will be completely internal.
Like the blood supply?
.. What I'm proposing is a
wrist band (or a choker style collar) with exclusively internal
componentry: capillary system with coolant fluid in it, pump that
enables fluid circulation, peltier(?) to cool the fluid....
Have you done any tests on yourself to measure how much cooling
you'll have to do.
Somehow I need ot get energy from somewhere to power the damn thing.
Sigh! If you're going to plan the damned project bassackwards, use
the energy of the person who is jumping up and down. Once upon
a time, sewing machines were powered by the foot.
I have to use a motor in there somewhere.. ...So I'll have my
self-generating motor... I have to figure out the most effective
type of motion that will activate the generator. The generator is
for... ...ummm...
You still have the problem of where you are going to vent the heat.
Are you going to vent it to the person next to you who is also
venting heat from his device onto you? You can't vent it towards
the floor because then you'll have to cool that heat repeatedly (heat
rises).
Heat does not rise. Heat conducts, radiates or disperses.
Hot air may rise, given its freedom.
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| User: "" |
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| Title: Re: re:Wearable cooling |
11 Sep 2004 05:47:39 AM |
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In article <txi0d.28287$9Y5.24113@fed1read02>,
"Richard Henry" <rphenry@home.com> wrote:
<jmfbahciv@aol.com> wrote in message
news:4141862f$0$6903$61fed72c@news.rcn.com...
In article <41417460$1_1@127.0.0.1>,
drop_dead333@hotmail-dot-com.no-spam.invalid (acr[]mion) wrote:
<snip>
You still have the problem of where you are going to vent the heat.
Are you going to vent it to the person next to you who is also
venting heat from his device onto you? You can't vent it towards
the floor because then you'll have to cool that heat repeatedly (heat
rises).
Heat does not rise. Heat conducts, radiates or disperses.
Hot air may rise, given its freedom.
Point. Thanks :-). I knew I should have been writing
hot air after I clicked. The way my mother's church
heats its auditorium during church service is to wait
until everybody sits down. Then they don't have to turn
the thermostat up.
/BAH
Subtract a hundred and four for e-mail.
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| User: "Ian Stirling" |
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| Title: Re: Wearable cooling |
08 Sep 2004 09:36:20 PM |
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acr[]mion <drop_dead333@hotmail-dot-com.no-spam.invalid> wrote:
I'm currently working on my final design project at uni - designing a
wearable cooling device for very humid conditions (e.g crowded rock
concert), which would be worn on the wrist. I'm proposing to use an
umbilical system, which means (from what I ..umm.. researched) that i
need a reservoir, pump, cooling device, heat sink, power source...
Block of ice.
1Kg of ice melting will absorb all heat generated from an active
human for well over an hour.
Take thick rubber balloon.
Inflate with water.
Freeze.
Attach enema tube, and you'r good to go.
May have PR problems.
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