Not a good sign. They are non-serviceable.
If you've checked the volute and impeller, then the only other moving parts are the shaft bearings and seal. Since it's been running noisy, I'm almost certain the bearings have gone. Lube won't help now.
Yeah, you can do it that way. I personally wouldn't because thermodynamics works on mass - volume is not really ever used for this kind of analysis. Specific heat capacity, latent heat capacity etc etc is all expressed as mass-based so your watts/L is just watts/kg divided by density. But...
That isn't the effect of vessel volume as such, it's specific boiling power (watts/kg). You'd get the same effect if you kept a 20L boil and made the power 200 kW or something crazy.
That's the flow chart for vegetable oil refining, which would include margarine, oils, waxes etc.
If you took one for milk (ie butter), it would be pretty similar in complexity.
If you're looking to accelerate the reactions in the boil, then it would be worth understanding the reaction kinetics (if anyone's actually done that research; it would be rather difficult). I think what a lot of people in this thread are angling at is: Yes, there is no data regarding boil...
Hallertau as a dry hop can introduce some grassiness. Not as bad as saaz, but I'd skip the dry hop to save more for the boil to compensate for the lower AA
It's better to make a bypass from the pump outlet to the pump inlet, and put a valve in there. This will more accurately control your flow than simply throttling the pump.
What you really want is an atemperation loop, as we call it. The problem is you'll need another pump, and a cooling water...
Hi mate, yeah it will affect your pressure readings, UNLESS your pressure gauges are calibrated for atmospheric pressure at that altitude (they won't be).
Well spotted.
It was right when I wrote the article, i can't say what the editor did. The article is very much dumbed down from the original submission I made, and it looks like during the reformatting the last two cells were duplicated.
Do some searching and reading. There is more than ample information out there explaining how to do this on both this forum and the internet at large. It is more complicated than just whacking some tube in.