Florescent light bulbs?

[[email protected]]

2C8H18 + 25O2 -> 16CO2 + 18H20

That's with octane - you can do the same with any hydrocarbon.

Hope This Helps!
Rich

To first order you can take (for the purpose of the above) petroleum as CH2,
so you get approximately 30% (by mass) of the exhaust as water.

Mati Meron | "When you argue with a fool,
[email protected] | chances are he is doing just the same"

 

[Homer J Simpson]

He is wrong about a lot of his theories. He claims that global warming
is caused only by C02 gasses

No, but Reagan said: "Approximately 80 percent of our air pollution stems
from hydrocarbons released by vegetation."

 

[jasen]

There are methane fuel cells, but what does a fuel cell have to do with
lighting? Make electricity, and run CFLs?

yeah something like that.

Haven't you ever seen a gas light? ;-)

yes, but they're not more efficient than incandescent.

OTOH if there's a chemical process that produces light directly (rather than by
incandescence) that'd probably be the winner.

Bye.
Jasen

 

[krw]

Al gore never claimed to have invented the internet.

He did claim responsibility for it though, which was absurd enough.

 

[krw]

No, but Reagan said: "Approximately 80 percent of our air pollution stems
from hydrocarbons released by vegetation."

Cite! He did say that forests contribute to pollution, which is
correct (see: Smokey Mountains).

 

[Richard Henry]

He did claim responsibility for it though, which was absurd enough.

If you read the actual words, he claimed to have financed it.

 

[The Ghost In The Machine]

In sci.math, jasen
<[email protected]>
wrote

yeah something like that.


yes, but they're not more efficient than incandescent.

OTOH if there's a chemical process that produces light directly (rather than by
incandescence) that'd probably be the winner.

Assuming the chemical can be produced with less energy than
using incandescent bulbs, fluorescent bulbs, or LEDs. There
is also the issue of feeding the reagents into the light,
and discarding the reaction products.

The best I can do here is luciferin or luciferinase, an
enzyme used by many animals (fireflies [family Lampyridae]
probably being the best known, but presumably it's also
used by deep sea creatures). Presumably the other reagent
in the reaction is oxygen, though according to

http://www.lifesci.ucsb.edu/~biolum/chem/

other atoms are also involved -- the example shows calcium.

After the chemical produces light it needs to be "reset", presumably by
additional energy input and/or another chemical reaction -- or more
reagents added into the light bulb.

 

[Eeyore]

In my shop, our CPUs ran so hot we had to air condition the
room even in winter.

I was recently pleased to discover that the 500 and 600 MHz Pentium 3 CPUs I have
can be cooled perfectly adequately without forced cooling.

At least that's one less fan to make noise and wear out.

Graham

 

[Eeyore]

I have an office like that: 9'4" x 9'6", 8-foot ceiling, and I leave all 4
computers running, and even if it gets down to the 40's, when I come in in
the morning, it's always nice and cozy-warm. If it gets too warm, I just
open the door - it opens out onto an unheated factory.

Speaking of fluorescent lights, just a couple of months ago they got a guy
to redo my ceiling light (which is obnoxiously bright, but there's not
much I can do about it), and the guy refurbished this 8-foot fixture with
iron ballast; he took the ballast and even the socket thingies out, and
installed new socket thingies and electronic ballasts, and essentially
turned the 8' fixture into two 4' fixtures end-to-end. He also gave me
one of those screw-in fluorescents for my desk lamp.

Since the PHB is so cheap, I'm ass-u-me-ing that he's expecting a
significant savings on lighting.

LOL ! The world works in funny ways.

My only real objection to CFLs is theway - at least over here - that their
equivalence to an incandescent buld is overstated.

It's common to say they're 5 times as efficient but I'd say more like 4 times. If
you read the small print apparently they're apparently being compared to bulbs
with a 'warm light'.

IME it takes at least a 23W CFL to equal a 100W incandescent and sadly these
aren't the ones being sold for 49 pence.

I have one room where I really like a 150W bulb to light it decently and there's
no direct equivalent for that.

I came across this though.............
http://cgi.ebay.co.uk/525w-LIGHT-OU...ryZ20706QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Now that should light a workshop nicely !
http://i22.ebayimg.com/05/i/08/e5/45/06_1.JPG

Graham

 

[Eeyore]

I have, maybe it's cheaper to buuild them for 240V operation. Or maybe it's
a socialist plot!

In the UK some CFLs get a government subsidy to encourage ppl to use them. Kyoto and
all that - except of course the USA doesn't do Kyoto.

I even got 2 free ones from the power utility as part of this scheme.

Graham

 

[Eeyore]

the cooling towers emit water vapour, which is basically the same stuff.

It's not *steam* though.

It's astonishing how many ppl think steam is visible too.

Graham

 

[Eeyore]

2C8H18 + 25O2 -> 16CO2 + 18H20

That's with octane - you can do the same with any hydrocarbon.

Hope This Helps!

C2H5OH + 3O2 -> 2CO2 + 3H2O

Interesting. Ethanol produces a smaller percentage of CO2 pro-rata compared to
the alkenes.

Whereas butanol goes slightly the other way.

C4H9OH + 6O2 -> 4CO2 + 5H2O

Graham

 

[Eeyore]

We have acompany over here (Australia) that manfactures a 48w
(=240W(?)) compact fluoro about half the size on the one on e-bay. I
use on in my office and it's great!

They have a (completely useless) web site - http://nelsonlamps.com.au
but they may be able to give you a link to someone where you are.

Thanks for that Alan.

I browsed eBay a bit longer and finally found the kind of thing I was looking for. I
could't have been looking hard enough before.

I found some CFLs at 30, 45 and 65 W
http://cgi.ebay.co.uk/ws/eBayISAPI....MEWA:IT&viewitem=&item=280058375469&rd=1&rd=1

http://cgi.ebay.co.uk/ws/eBayISAPI....MEWA:IT&viewitem=&item=280058068352&rd=1&rd=1

http://cgi.ebay.co.uk/ws/eBayISAPI....MEWA:IT&viewitem=&item=280058067410&rd=1&rd=1

I'm sceptical that the 30W is really as bright as a normal 150W incandescent myself,
so I reckon I'll go for a 45W.


Graham

 

[Alan]

I have one room where I really like a 150W bulb to light it decently and there's
no direct equivalent for that.

We have acompany over here (Australia) that manfactures a 48w
(=240W(?)) compact fluoro about half the size on the one on e-bay. I
use on in my office and it's great!

They have a (completely useless) web site - http://nelsonlamps.com.au
but they may be able to give you a link to someone where you are.

Alan

--
Sell your surplus electronic components at
http://ozcomponents.com
Search or browse for that IC, capacitor,
crystal or other component you need.
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[Troia]

[email protected] wrote: ....

I was recently pleased to discover that the 500 and 600 MHz Pentium 3 CPUs I have
can be cooled perfectly adequately without forced cooling.

At least that's one less fan to make noise and wear out.

Graham

Do you short out the fan header or what?

Most of the mobo's I've seen for P3's will not power-on without the CPU
fan connected, among other things.

-- Troia

 

[Eeyore]

can be cooled perfectly adequately without forced cooling.

Do you short out the fan header or what?

Most of the mobo's I've seen for P3's will not power-on without the CPU
fan connected, among other things.

That's normally controlled by the CMOS settings. Why don't you take a peek at them ?

I bought this old PC simply because I wanted another MX440 AGP graphics card and it
worked out just as cheap ( £10 on eBay - local collection ) to buy a whole PC with one
fitted !

In the meantime my 'good' PC started acting up ( probably the 'bad caps' scenario - the
mobo is known to have been affected ) so I powered up this one to use for real.

The 500MHz cpu that came with it never had a fan in the first place which surprised me
as they were supposedly the power hogs of the day but it has a substantial 'passive'
convection heatsink that does the job just fine.

I happened to have a 600MHz P3 too and fitted that. The fan wire wasn't long enough so
I tried it as was and it's fine !


Graham

 

[jasen]

If you read the actual words, he claimed to have financed it.

well, authorised the finance, ultimately they were tax dollars.

Bye.
Jasen

 

[[email protected]]

Nah - if you learn to light one properly, the deflagration front is
contained within millimeters of the mantle. ;-)

I have watched people fill the auto gas tank. Despite all warnings
I've seen men and women hanging onto a cigarette while doing so.

I think the 'if' in your sentence should be spelled IFF.

/BAH

 

[[email protected]]

I have an office like that: 9'4" x 9'6", 8-foot ceiling, and I leave all 4
computers running, and even if it gets down to the 40's, when I come in in
the morning, it's always nice and cozy-warm. If it gets too warm, I just
open the door - it opens out onto an unheated factory.

Speaking of fluorescent lights, just a couple of months ago they got a guy
to redo my ceiling light (which is obnoxiously bright, but there's not
much I can do about it), and the guy refurbished this 8-foot fixture with
iron ballast; he took the ballast and even the socket thingies out, and
installed new socket thingies and electronic ballasts, and essentially
turned the 8' fixture into two 4' fixtures end-to-end. He also gave me
one of those screw-in fluorescents for my desk lamp.

Since the PHB is so cheap, I'm ass-u-me-ing that he's expecting a
significant savings on lighting.

I'd go bonkers in your office. I always had the flurescent bulbs
above my office taken out. I could see their flicker even though
no one else could.

/BAH

 

[[email protected]]

It was, with CRT terminals. Since those are disappearing by now,

My $500 terminal is now a dinosaur?! I can't keep up with this
biz.

the
worries expressed in this thread about the energy wasted by
screensavers are, if not misplaced, then at least vastly exaggerated.

hmmm...I never thought about screensavers' functionality w.r.t.
the new [emoticon hunts for term]display technology. I don't
know much about it. Are you implying that the displays can't get
burnt in?

It that's not clear, tell me and I'll try again tomorrow. I'm thinking
through the fourth bout of the dumb flu.

/BAH