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Post by coldspaces on Mar 25, 2014 18:14:42 GMT
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Post by ChrisJ on Mar 25, 2014 18:26:36 GMT
1926!?!?
Why didn't GE use this!?! It would've cured 80% of their methyl formate problems.
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Post by coldspaces on Mar 25, 2014 18:31:16 GMT
1926!?!? Why didn't GE use this!?! It would've cured 80% of their methyl formate problems. That of course I don't know, may have thought the hermetically sealed system didn't need one. I Googled "filtering so2" and this one thing I found. Was trying to confirm activated alumina and so2 are compatible like Birkie suggested they should be. |
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Post by allan on Mar 25, 2014 22:51:11 GMT
1926!?!? Why didn't GE use this!?! It would've cured 80% of their methyl formate problems. Did you mean SO2 problems? Want to make sure I ain't missing something here:-) |
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Post by ChrisJ on Mar 25, 2014 23:21:59 GMT
1926!?!? Why didn't GE use this!?! It would've cured 80% of their methyl formate problems. Did you mean SO2 problems? Want to make sure I ain't missing something here:-) I guess I mean both. The point was driers already existed for refrigeration systems. Is this another situation where GE refused to use something someone else had the patent on? |
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Post by coldspaces on Jan 10, 2016 22:57:30 GMT
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Post by coldspaces on Jan 13, 2016 4:26:09 GMT
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Post by ChrisJ on Jan 13, 2016 13:51:48 GMT
Amazing.
Please, keep them coming!
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Post by coldspaces on Dec 5, 2016 4:04:53 GMT
Nice PT chart for SO2 I found in 1943 Althouse and Turnquist  |
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Post by birkie on Mar 3, 2017 2:29:55 GMT
(I'm catching up on what has been going on in these forums over the past couple years) This was a great read! There were a few points that made an impression on me: - It is important that the oil is fairly soluble with refrigerant at room temperature, so that any oil introduced into the condenser does not accumulate in the high-side float. Certain oils exhibit this property with SO2 more than others. Conversely, having the two become insoluble at evaporator temperatures is desirable as well. I always wondered how oil didn't just end up forming a layer atop the liquid in the float chamber that never entered the evaporator at all.
- Less-refined "colored" oils tend to be more soluble in SO2 than more refined colorless oils.
- The rate at which oil reacts with SO2 to form carbon varies considerably based on the composition of the oil. There's no way to predict the rate of decomposition; it needs to be measured for each specific oil. In general, any oil reacts twice as fast for every 10F rise in temperature.
- The stability of commercially available oils improved considerably between 1932 and 1934 (when the article was published). In 1932, there were just a few that didn't entirely decompose into carbon after being subjected to 500F in SO2 for 4 hours. In 1934, many survived 8 hours with only slight darkening; a few to 16. I assume the CKs were beneficiaries of this rapid improvement in oil stability!
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Post by Travis on Mar 3, 2017 6:07:27 GMT
Oh my, all the DR's need an oil change!
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Post by elec573 on Mar 3, 2017 6:53:15 GMT
Maybe that's the black gunk thats clogging the floats ? (Oil decomposition )
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Post by Travis on Mar 3, 2017 7:56:17 GMT
I am betting so. They need an enema and new oil.
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Post by ckfan on Mar 3, 2017 15:00:13 GMT
I've always wondered how damaging the old oil was in these old systems. I mean, they seem to run fine with the old oil but it makes you wonder how much damage it is causing.
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Post by birkie on Mar 3, 2017 18:31:07 GMT
I've always wondered how damaging the old oil was in these old systems. I mean, they seem to run fine with the old oil but it makes you wonder how much damage it is causing. At least the we know that the old oil must have carefully selected to have the best properties available at the time, given the wide range of stability-in-SO2 (and temperature-dependent solubility characteristics?) found in mineral oils in the wild. I'd be curious how a random off-the-shelf oil from this era might compare. It could be better ...or worse! |
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