Post volume size?
- Thread starter Jameso
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Percentage loss isn't as accurate and consistent as volume loss.
There are other factors at play such as pot dimensions and specific volume of the pot.
If I fill pot "x" with 30l of water and boil for an hour, or fill it with 40l if water and boil for an hour at the same temp and in the same conditions, I'd imagine the boil off will be the same. A percentage wouldn't show this.
There are other factors at play such as pot dimensions and specific volume of the pot.
If I fill pot "x" with 30l of water and boil for an hour, or fill it with 40l if water and boil for an hour at the same temp and in the same conditions, I'd imagine the boil off will be the same. A percentage wouldn't show this.
Not For Horses
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Can a pot have a non specific volume? 
You're fairly right about the 30 to 40L example. There will be a slight change due to the extra energy required to keep an extra 10L of liquid from trying to cool to ambient temperature.
If you aim to loose 10L per hour for your batch size you should be golden.
This will obviously require some trial and error.
I read in a book some time ago (can't remember what book sorry) that too much above 12% per hour can start to produce unwanted flavour compounds.
You're fairly right about the 30 to 40L example. There will be a slight change due to the extra energy required to keep an extra 10L of liquid from trying to cool to ambient temperature.
If you aim to loose 10L per hour for your batch size you should be golden.
This will obviously require some trial and error.
I read in a book some time ago (can't remember what book sorry) that too much above 12% per hour can start to produce unwanted flavour compounds.
I'm not talking about the volume a pot can hold. I'm talking about the volume that is in the pot at any given time.Not For Horses said:Can a pot have a non specific volume?
EDIT: perhaps I should have said "specific volume in the pot".
Not For Horses
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Something else worth mentioning is the time taken to get to boiling. A longer time will mean more evaporation before you start your timer. If you do loose too much, you may want top it up with boiled water at the end.
Slightly unrelated question but I was curious about the 84L volume? Where did you get that number from?
Slightly unrelated question but I was curious about the 84L volume? Where did you get that number from?
For the 84L my guess, as it's a size I do, it is 3 x 25L no-chill containers. My 25L cubes hold 28L full to the brim.
For evaporation I was told 10%-15%. Under 10% you risk leaving DMS in lighter styles beers, over 15% you risk caramalising the wort too much.
I think you would be pushing it for 84L from a 100L. If you measure your pot most pots are actually X-n in capacity. My 140L pot/kettle is 137L. I can squeeze a 112L batch out of it.
For evaporation I was told 10%-15%. Under 10% you risk leaving DMS in lighter styles beers, over 15% you risk caramalising the wort too much.
I think you would be pushing it for 84L from a 100L. If you measure your pot most pots are actually X-n in capacity. My 140L pot/kettle is 137L. I can squeeze a 112L batch out of it.
