Propane's toxicity probably is more relevant to its behavior in the presence
of oxygen & flame.

"Ivan Jager" <aij+nospam@andrew.cmu.edu> wrote in message
news:slrnf6bqo8.2md.aij+nospam@tellurium.club.cc.c mu.edu...
> On 2007-06-02, RSMuddog <u34723@uwe> wrote:
>> than others with their cooling capacities, and then there are those that
>> are
>> toxic and flamable. A ideal refrigerant has low toxicity and low
>> flamability.
>> Propane is neither, but has good refrigerant capacity.
>
> Propane is toxic? AFAICT it's no more toxic than good ol' Nitrogen. I'm
> having trouble finding an MSDS whose toxicology section says it is more
> than an asphyxiant, or that the liquid can boil on your skin and cause
> frostbite.
>
> I'd still be wary of using it in an A/C because of the flamability and
> possibly increased pressures.
>
> Ivan

 

Propane's toxicity probably is more relevant to its behavior in the presence
of oxygen & flame.

"Ivan Jager" <aij+nospam@andrew.cmu.edu> wrote in message
news:slrnf6bqo8.2md.aij+nospam@tellurium.club.cc.c mu.edu...
> On 2007-06-02, RSMuddog <u34723@uwe> wrote:
>> than others with their cooling capacities, and then there are those that
>> are
>> toxic and flamable. A ideal refrigerant has low toxicity and low
>> flamability.
>> Propane is neither, but has good refrigerant capacity.
>
> Propane is toxic? AFAICT it's no more toxic than good ol' Nitrogen. I'm
> having trouble finding an MSDS whose toxicology section says it is more
> than an asphyxiant, or that the liquid can boil on your skin and cause
> frostbite.
>
> I'd still be wary of using it in an A/C because of the flamability and
> possibly increased pressures.
>
> Ivan

 

Propane's toxicity probably is more relevant to its behavior in the presence
of oxygen & flame.

"Ivan Jager" <aij+nospam@andrew.cmu.edu> wrote in message
news:slrnf6bqo8.2md.aij+nospam@tellurium.club.cc.c mu.edu...
> On 2007-06-02, RSMuddog <u34723@uwe> wrote:
>> than others with their cooling capacities, and then there are those that
>> are
>> toxic and flamable. A ideal refrigerant has low toxicity and low
>> flamability.
>> Propane is neither, but has good refrigerant capacity.
>
> Propane is toxic? AFAICT it's no more toxic than good ol' Nitrogen. I'm
> having trouble finding an MSDS whose toxicology section says it is more
> than an asphyxiant, or that the liquid can boil on your skin and cause
> frostbite.
>
> I'd still be wary of using it in an A/C because of the flamability and
> possibly increased pressures.
>
> Ivan

 

In article <79jc63h3qal1v365c6cse9o7lfhie81thj@4ax.com>,
Grumman-581 <grumman581@DIE-SPAMMER-SCUM-gmail.com> wrote:

> On 05 Jun 2007 23:00:24 GMT, Ivan Jager <aij+nospam@andrew.cmu.edu>
> wrote:
>
> > I'd still be wary of using it in an A/C because of the flamability and
> > possibly increased pressures.
>
> What sort of pressures do normal freon based A/Cs use?

Static pressures would equal ambient temperatures.
Running pressures; 30 psi low side, 200+ on the high side.

> LPG tanks are
> usually rated for 300 psi, so I suspect that would be the worst that
> the A/C would need to handle...

LP tanks are of a different construction. Automotive AC piping
is quite fragile.

 

In article <79jc63h3qal1v365c6cse9o7lfhie81thj@4ax.com>,
Grumman-581 <grumman581@DIE-SPAMMER-SCUM-gmail.com> wrote:

> On 05 Jun 2007 23:00:24 GMT, Ivan Jager <aij+nospam@andrew.cmu.edu>
> wrote:
>
> > I'd still be wary of using it in an A/C because of the flamability and
> > possibly increased pressures.
>
> What sort of pressures do normal freon based A/Cs use?

Static pressures would equal ambient temperatures.
Running pressures; 30 psi low side, 200+ on the high side.

> LPG tanks are
> usually rated for 300 psi, so I suspect that would be the worst that
> the A/C would need to handle...

LP tanks are of a different construction. Automotive AC piping
is quite fragile.

 

In article <79jc63h3qal1v365c6cse9o7lfhie81thj@4ax.com>,
Grumman-581 <grumman581@DIE-SPAMMER-SCUM-gmail.com> wrote:

> On 05 Jun 2007 23:00:24 GMT, Ivan Jager <aij+nospam@andrew.cmu.edu>
> wrote:
>
> > I'd still be wary of using it in an A/C because of the flamability and
> > possibly increased pressures.
>
> What sort of pressures do normal freon based A/Cs use?

Static pressures would equal ambient temperatures.
Running pressures; 30 psi low side, 200+ on the high side.

> LPG tanks are
> usually rated for 300 psi, so I suspect that would be the worst that
> the A/C would need to handle...

LP tanks are of a different construction. Automotive AC piping
is quite fragile.

 

In article <79jc63h3qal1v365c6cse9o7lfhie81thj@4ax.com>,
Grumman-581 <grumman581@DIE-SPAMMER-SCUM-gmail.com> wrote:

> On 05 Jun 2007 23:00:24 GMT, Ivan Jager <aij+nospam@andrew.cmu.edu>
> wrote:
>
> > I'd still be wary of using it in an A/C because of the flamability and
> > possibly increased pressures.
>
> What sort of pressures do normal freon based A/Cs use?

Static pressures would equal ambient temperatures.
Running pressures; 30 psi low side, 200+ on the high side.

> LPG tanks are
> usually rated for 300 psi, so I suspect that would be the worst that
> the A/C would need to handle...

LP tanks are of a different construction. Automotive AC piping
is quite fragile.

 

On Thu, 07 Jun 2007 00:19:23 GMT, aarcuda69062
<nonelson@sbcglobal.net> wrote:

> Static pressures would equal ambient temperatures.
> Running pressures; 30 psi low side, 200+ on the high side.

I can see how LPG could work as a refrigerant... The numbers look
about right... If the LPG has the odorant added to it, you would
quickly know if there was a leak and it was getting into the passenger
compartment... It would be noticeable quite a bit before it got into a
flammable concentration... Anything less that 2.2% or more than 9.5%
is not flammable... All in all, LPG is a relatively safe gas...
Hydrogen, on the other hand, is flammable from 4% to 75%... Not really
important from an A/C refrigerant standpoint, but important from a
standpoint of eventually using it in vehicles as a replacement to
gasoline... A lot of the fix-a-flat type devices use propane / LPG as
the gas to refill the tires with... Since LPG has such a narrow
flammability range, it would be pure luck if you happened to end up
with a tire that had a flamable concentration in it...

 

On Thu, 07 Jun 2007 00:19:23 GMT, aarcuda69062
<nonelson@sbcglobal.net> wrote:

> Static pressures would equal ambient temperatures.
> Running pressures; 30 psi low side, 200+ on the high side.

I can see how LPG could work as a refrigerant... The numbers look
about right... If the LPG has the odorant added to it, you would
quickly know if there was a leak and it was getting into the passenger
compartment... It would be noticeable quite a bit before it got into a
flammable concentration... Anything less that 2.2% or more than 9.5%
is not flammable... All in all, LPG is a relatively safe gas...
Hydrogen, on the other hand, is flammable from 4% to 75%... Not really
important from an A/C refrigerant standpoint, but important from a
standpoint of eventually using it in vehicles as a replacement to
gasoline... A lot of the fix-a-flat type devices use propane / LPG as
the gas to refill the tires with... Since LPG has such a narrow
flammability range, it would be pure luck if you happened to end up
with a tire that had a flamable concentration in it...

 

On Thu, 07 Jun 2007 00:19:23 GMT, aarcuda69062
<nonelson@sbcglobal.net> wrote:

> Static pressures would equal ambient temperatures.
> Running pressures; 30 psi low side, 200+ on the high side.

I can see how LPG could work as a refrigerant... The numbers look
about right... If the LPG has the odorant added to it, you would
quickly know if there was a leak and it was getting into the passenger
compartment... It would be noticeable quite a bit before it got into a
flammable concentration... Anything less that 2.2% or more than 9.5%
is not flammable... All in all, LPG is a relatively safe gas...
Hydrogen, on the other hand, is flammable from 4% to 75%... Not really
important from an A/C refrigerant standpoint, but important from a
standpoint of eventually using it in vehicles as a replacement to
gasoline... A lot of the fix-a-flat type devices use propane / LPG as
the gas to refill the tires with... Since LPG has such a narrow
flammability range, it would be pure luck if you happened to end up
with a tire that had a flamable concentration in it...