Cooling and insulating fluid

[whit3rd]

It is a bitch to get electrical specs for any oil

Shell Diala AX oil is used in electrical-discharge machining, one
CAN get electrical specs on it. Presumably the insulating/cooling oils
in power transformers are also held within some kind of electrical
limits.

You won't like how loose the specifications are, of course.

 

[josephkk]

It is a bitch to get electrical specs for any oil, and in some cases
hard to get the boiling point as well (flash point seems easy).
The FR3 seems to be better than the "plain" mineral oils
electrically, boiling point and thermal.
But there is an indication of many mineral oils,and then the
possibility of using silicone oil.

Sigh, choices....with so little data to help.

I don't suppose that you have tried searching for *+insulating +oil* ?

 

[David Lesher]

Now THAT data sheet has it all; no MSDS bush beating.
I see they have other 7xxx; is the 7500 top of the thermal line?

That Depends. Call them and get their advice; this is 3M, not
Acme Transistor & Storm Door Company. Their guru knows what he's
talking about.

 

[Robert Baer]

I don't suppose that you have tried searching for *+insulating +oil* ?

Like most search items tried, this also (mostly) "gives" useless (as
well as unobtainable) ASTM "specs", recycling centers, and used oil
suppliers.
Again, like most search terms used, one is lucky to get one
potentially useful source.
At least now i have a few potential sources that i can nag for some
real (read: usable) numbers and prices.

 

[Robert Baer]

Like most search items tried, this also (mostly) "gives" useless (as
well as unobtainable) ASTM "specs", recycling centers, and used oil
suppliers.
Again, like most search terms used, one is lucky to get one potentially
useful source.
At least now i have a few potential sources that i can nag for some real
(read: usable) numbers and prices.

Due to conflicting "specifications" and lack of data (mainly thermal
conductivity, availability, cost, where to buy),i have e-mailed the
various sources for specifics.
The Novec 7500 spec sheet is the only one that is "complete",however
it gives breakdown and not dielectric strength.
From that, it would seem that thermal conductivity is crap for oils,
being slightly better than still air and one tenth of water.

I know, a new product, SkyBuckian: Non-Polar Water!!!

 

[josephkk]

Problem with most of the waxes that have _some_ info available, is
the low MP and flash point - making them a definite hazard.
So hi MP waxes may be better, but there seems to be no info on them
except that they presumably exist.

Say Robert, is this stuff the kind of thing you are looking for?

http://ergonnsa.com/products/hyvolt

http://www.soltexinc.com/dielectric-fluids-PL.cfm

http://www.shell.com/home/content/lubes/products/product_range/diala/

?-)

 

[Robert Baer]

Say Robert, is this stuff the kind of thing you are looking for?

http://ergonnsa.com/products/hyvolt

* They have 4, two data sheets using dielectric BV, two using actual (be
still my heart) dielectric strength; also viscosity in different and
non-reconcilable units, and ZERO thermal conductivity info. E-mailed them.

http://www.soltexinc.com/dielectric-fluids-PL.cfm

* Thanks! Had not found them; will add to the inconsistent list.

http://www.shell.com/home/content/lubes/products/product_range/diala/

* Again, BV (NO dielectric strength) and NO thermal conductivity;
e-mailed them.

 

[josephkk]

Like most search items tried, this also (mostly) "gives" useless (as
well as unobtainable) ASTM "specs", recycling centers, and used oil
suppliers.
Again, like most search terms used, one is lucky to get one
potentially useful source.
At least now i have a few potential sources that i can nag for some
real (read: usable) numbers and prices.

The standards are available for about us$40 each including D3487 which is
the one you want.

I bumbled around a bit with garbage responses as well then i found
*insultion-oil -filter -recycler -tester* which has reasonable number of
positives and less other stuff. See my other post with some hits.

?-)

 

[josephkk]

Due to conflicting "specifications" and lack of data (mainly thermal
conductivity, availability, cost, where to buy),i have e-mailed the
various sources for specifics.
The Novec 7500 spec sheet is the only one that is "complete",however
it gives breakdown and not dielectric strength.
From that, it would seem that thermal conductivity is crap for oils,
being slightly better than still air and one tenth of water.

I know, a new product, SkyBuckian: Non-Polar Water!!!

Oil is going to have thermal conduction a lot like plastic, after all
aren't some plastics just polymerized oils? You can get heat transport if
it is flowing well. For real heat transport you need phase change.

?-)

 

[Robert Baer]

The standards are available for about us$40 each including D3487 which is
the one you want.

* Like i said or implied, "standards" at sky high / unaffordable prices.
And what i have seen in one or two, there are NO values given for
(mumble), just unclear ways to test for (mumble) - making them a waste
of dollars.

 

[Robert Baer]

Oil is going to have thermal conduction a lot like plastic, after all
aren't some plastics just polymerized oils? You can get heat transport if
it is flowing well. For real heat transport you need phase change.

?-)

Check; "flowing well" translates to low viscosity as well as a
temperature sensitivity to help it flow.
I am not an engineer, i do not drive trains, so any attempt to to
"force" phase changes would have a guarantee to fail.

 

[josephkk]

* Like i said or implied, "standards" at sky high / unaffordable prices.
And what i have seen in one or two, there are NO values given for
(mumble), just unclear ways to test for (mumble) - making them a waste
of dollars.

Since you won't even try or test what i have to say, i am done trying to
help you on this topic.

?-)

 

[josephkk]

* They have 4, two data sheets using dielectric BV, two using actual (be
still my heart) dielectric strength; also viscosity in different and
non-reconcilable units, and ZERO thermal conductivity info. E-mailed them.

* Thanks! Had not found them; will add to the inconsistent list.

* Again, BV (NO dielectric strength) and NO thermal conductivity;
e-mailed them.

Well i did give you an alternative search string elsewhere.

?-)

 

[Robert Baer]

Since you won't even try or test what i have to say, i am done trying to
help you on this topic.

?-)

Like i SAID, i have done all of that and more.

 

[[email protected]]

Den tirsdag den 4. december 2012 04.45.50 UTC+1 skrev Robert Baer:

How about the burp?

hej

Jeg kender en opfinder som leder solen gennem små prismaer og ned i et stof som optager varmen sådan 1800 grader sådan at han kan opbavarer varmen meget længe og tage det op igen præcis efter ønske...
Preben