Well I've just got into this Homebrew thing and the kits I've completed have all thankfully turned out well.
However I like to mess about and have now brought 15kg of Brupaks pale malt extract, some hop pellets and crushed Crystal malt to play with.
What I did was this.
Boiled 8 litres of water in my urn and steeped 200gm of crushed cystal malt for 30 mins in a muslin bag at 60/70c, drew this off into a jug with some of my LME to dissolve it then added to my FV.
I then put 53g styvian golding pellets (3.3% aa) and 50g fuggles (4%) into a muslin bag and boiled with about 1kg LME topped up to 8 litres with water in my urn for 90 mins adding 15g fuggles for the last 10 mins.
In total I used 3550g LME.
The 15 litres I then had was then topped up with 8 litres of cold water treated with a small piece of campden tablet.
Within an hour or so the mixture was down to 25c so i added the safale 04 yeast.
The starting gravity was 1047.
So what do we think I've been reading loads on here but as ever think I know better so did it my way.
By my reconing if the LME doesn't need boiling for 90 mins why bother and if the hops are boiled in 1kg LME made up to 8 litres with water will the extraction be so much less?.
This way I don't need a bigger boiler or cooler.
So have I made a right mess of things
Concentrated Extract Method,,,,of sorts
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anomalous_result
Having built my boiler I realised I didn't have any form of chiller so did a similar thing although boiled all my extract, largely because I could.
The problem of boiling hops in a more sugary solution is that the utilisation will be lower, this page suggests that at 90 minutes in 1040 it will be 27%, but that in 1080 it will be only 19%. This means there will be 30% less bitterness if you use the same amount of hops. As a result my old ale's under hopped. However, the solution you used (1kg malt extract in 8 litres of water) seems about right, unlike my 3kg in 10 litres. Not sure about the effects of boiling it in a smaller volume though.
The problem of boiling hops in a more sugary solution is that the utilisation will be lower, this page suggests that at 90 minutes in 1040 it will be 27%, but that in 1080 it will be only 19%. This means there will be 30% less bitterness if you use the same amount of hops. As a result my old ale's under hopped. However, the solution you used (1kg malt extract in 8 litres of water) seems about right, unlike my 3kg in 10 litres. Not sure about the effects of boiling it in a smaller volume though.