Hi Aussie50, this is exactly what I wanted to know. I have one pump from a fridge I found dumped in the bush, it pulls 28inches Hg...I want to boil water at room temperature. Also, isn't 30Inches Hg absolute vacuum anyway.. ?
I have an idea, if you have a working vfd that goes to 400Hz, hook three of these danfoss compressors to it, one on each phase, drain the oil and then turn them up to the highest speed u can get and then let them run till they seize up. ;)
unfortunately i don't have a working VFD at all :( but I have done a few torture tests with normal AC power and no oil but their not very dramatic, just binds up the motor bearing and stops it.
I'd love to rev them to 2 - 3 X their normal speed and see them shatter :D.
I'll belt drive one off the 2HP brook motor some day before I run the big scroll.
thanks man!, the music in the vid is from the game Unreal, very cool music. I still have the original s3m and it (Screamtracker and impulsetracker) files
Maximum Vacuum attainable at Sea level is 29.921 In/mmg If you are higher than that it diminishes roughly 3.5% per 1000 ft above sea level. :)
lazerusmfh 1 year ago
yeah, its sort of an aussie tradition to drink in the garage, but if I have a big machining job to do I do it first.
no use scrapping a complicated part because of a minor miscalculation. or getting wrapped around the spindle to that matter.
Aussie50 2 years ago
Very good idea!! clean and nice work...
burlesque78 2 years ago
Hi Aussie50, this is exactly what I wanted to know. I have one pump from a fridge I found dumped in the bush, it pulls 28inches Hg...I want to boil water at room temperature. Also, isn't 30Inches Hg absolute vacuum anyway.. ?
savepenguintrees 2 years ago
I'm not an expert on vacuum but I think we can go lower than 30in/hg. HVAC vac pumps pull 500 microns on AC systems before they are charged with gas.
I haven't been able to boil water itself at 30in/hg, but thats according to my old gauge.
Aussie50 2 years ago
very nice setup.
V8Jagnut 2 years ago
I wish i could get scrap fridge compressors like this where i live too, i envy you alot.
diymania 2 years ago
I wish I could keep these too!, but they have to be accounted for on the scrap records :(
I'll push the limits by doing educational films with them but at the end of the day, I have to issue a Certificate of Destruction to Danfoss.
ones I find out what they are capable of I'll build one using compressors from junk fridges which I don't have to account for.
Aussie50 2 years ago
I have an idea, if you have a working vfd that goes to 400Hz, hook three of these danfoss compressors to it, one on each phase, drain the oil and then turn them up to the highest speed u can get and then let them run till they seize up. ;)
diymania 2 years ago
unfortunately i don't have a working VFD at all :( but I have done a few torture tests with normal AC power and no oil but their not very dramatic, just binds up the motor bearing and stops it.
I'd love to rev them to 2 - 3 X their normal speed and see them shatter :D.
I'll belt drive one off the 2HP brook motor some day before I run the big scroll.
Aussie50 2 years ago
NICE SET UP ,cool music to i like jamen
wordles tones when im realy hittn it hard
NOBOX7 2 years ago
thanks man!, the music in the vid is from the game Unreal, very cool music. I still have the original s3m and it (Screamtracker and impulsetracker) files
Aussie50 2 years ago