AG question: chilling wort by pouring In cold water

Discussion in 'General Beer Brewing Discussion' started by stinka, Dec 10, 2019.

Help Support The Homebrew Forum UK by donating:

  1. Dec 10, 2019 #1

    stinka

    stinka

    stinka

    Active Member

    Joined:
    Nov 23, 2019
    Messages:
    38
    Likes Received:
    6
    Can you add cold water to your wort if you made up 3-4 litres short instead of using a wort chiller ?
     
  2. Dec 10, 2019 #2

    Cowman

    Cowman

    Cowman

    Active Member

    Joined:
    Dec 6, 2018
    Messages:
    54
    Likes Received:
    18
    Location:
    Solihull
    It would cool it off but not enough to get to pitching rate. You'd need to split it half and half but your hop utilisation would plummet
     
  3. Dec 10, 2019 #3

    GerritT

    GerritT

    GerritT

    Landlord. Supporting Member

    Joined:
    Jul 27, 2017
    Messages:
    2,313
    Likes Received:
    750
    That would only be efficient if you'd do it to get a brew from 25º to 20ºC.

    Suppose you have 12 liter wart @25º and you'd add 4 liter @ 10º.

    (12*25+4*10)/16 makes 16 liter @21.25º
     
  4. Dec 10, 2019 #4

    stinka

    stinka

    stinka

    Active Member

    Joined:
    Nov 23, 2019
    Messages:
    38
    Likes Received:
    6
    Ah ok

    just confused after watching this



    I know he’s adding a small wort addition to a kit, but I just wondered
     
  5. Dec 10, 2019 #5

    Cowman

    Cowman

    Cowman

    Active Member

    Joined:
    Dec 6, 2018
    Messages:
    54
    Likes Received:
    18
    Location:
    Solihull
    He's adding in the LME at the end instead of at the start of the boil as the higher the sg is during the boil the lower the hop utilisation will be. I tried doing a half boil and cooling with the extra water once without taking that into consideration and there was no bitterness at all. If that all makes sense:laugh8:
     
  6. Dec 10, 2019 #6

    terrym

    terrym

    terrym

    Member

    Joined:
    Apr 12, 2015
    Messages:
    5,221
    Likes Received:
    2,713
    Location:
    North Sussex
    @stinka
    I looked at a small part of the video. It could have done with a lot of editing!
    Anyway I guess all he is doing is is a smaller volume mash with a hop boil to be added to a kit. So not all the wort starts hot just the boiled mash volume part. The rest is just made up a like a kit using cold water. More on that here
    https://www.thehomebrewforum.co.uk/threads/simple-kit-plus-mini-mash-method-to-improve-a-kit.52938/
    So translated to a full volume AG brew I suppose you could make up a lower volume more concentrated wort for the boil and then dilute that with cold water in the FV at the end. But you would have to adjust the hopping rates since hop utilisation in the boil is different for more concentrated worts.
    However, as others have pointed out, the bigger the boil volume the more you will have to consider cooling the wort and/or chilling the cold water so that you get the correct pitching temperature. I do partial mashes using a 9 litre pot for nominal 20 litre brews and it still takes me 30/40 minutes to get the hot wort temperature down to the lower 20*C's using several sinkfuls of water, to mix with the cold water in the FV .
     
  7. Dec 10, 2019 #7

    MrRook

    MrRook

    MrRook

    Landlord.

    Joined:
    Feb 10, 2017
    Messages:
    514
    Likes Received:
    164
    Location:
    Crescent City, CA
    Due to my living situation I've been doing, mostly, no-boil extract brews in two gallon batches. I've had success heating half a gallon of water and mixing in 1/4 to 1/2 of the extract. After steeping with some hops I mix in the remaining extract and then I add one and one half gallons of cold water which gets me pretty close to proper pitching temperature.
     
    GerritT likes this.
  8. Dec 10, 2019 #8

    Harbey

    Harbey

    Harbey

    Regular.

    Joined:
    Aug 12, 2018
    Messages:
    297
    Likes Received:
    89
    Location:
    Scarborough UK
    I do things differently now, but I used to get my wort temp down by throwing in a couple of frozen bottles of water ( still in the bottles and sanitised of course). I also don't worry too much about that last 5-10 degrees. I just get it in the FV then wait to pitch the yeast until it naturally gets down to my target temp.
     
    stinka likes this.
  9. Dec 10, 2019 #9

    stinka

    stinka

    stinka

    Active Member

    Joined:
    Nov 23, 2019
    Messages:
    38
    Likes Received:
    6
    I bet that worked pretty bloody well !
     
  10. Dec 10, 2019 #10

    Birkin

    Birkin

    Birkin

    Well-Known Member

    Joined:
    Nov 25, 2015
    Messages:
    172
    Likes Received:
    86
    Location:
    NULL
    I bought a chiller as soon as I went to All grain (I brewed one of those cheap wilko lager kits, it was awful, so I decided to go straight to AG). In the early days I used to chill down to 35c before pitching, and I know now that this was a little too hot, but it seemed to work ok. The only reason I mention this is that the frozen bottle idea sounds like a good shout to me, but might take a while to get right down to 20 C and the sooner you get the yeast in once down to temp, the better.

    For what it's worth, my cooler was about £30 off ebay and it works an absolute charm, it's just a simple copper coil with hose fittings attached to it!

    Unless you're brewing on a small budget (Nowt wrong with that, its how I started) then i'd recommend saving yourself some grief and buy a chiller.
     
  11. Dec 10, 2019 #11

    IainM

    IainM

    IainM

    Syphon-sucking bag squeezer

    Joined:
    Oct 19, 2015
    Messages:
    2,543
    Likes Received:
    1,351
    Location:
    Cambridge
    stinka likes this.
  12. Dec 10, 2019 #12

    Birkin

    Birkin

    Birkin

    Well-Known Member

    Joined:
    Nov 25, 2015
    Messages:
    172
    Likes Received:
    86
    Location:
    NULL
    Previous good'uns: Epiphany Triple, Fisherman stout, Hefeweizen, NEIPA, BIPA x 5, Belgian IPA, RIS, Zombie Dust, Munich dunkle, dark mild, Gales Festival Mild (GW clone), RyeIPA, NEDIPA, Bitter, Perry and cider from scratch, Hobgob clone, DIYDog Dogma, Mild, ginger beer

    Somehow, making ginger beer kicked off my re-introduction to homebrew (First was a cheap wilko kit which had a horrid 'twang', then long time.. then AG). One of the first AG's that I made was a Hobgoblin clone, it was a beautiful ruby red colour and a decent all round brew.
     
  13. Dec 11, 2019 #13

    HarryFlatters

    HarryFlatters

    HarryFlatters

    Regular. Supporting Member

    Joined:
    Nov 1, 2018
    Messages:
    377
    Likes Received:
    126
    I've been doing no chill since the summer, and it works really well.

    I am in Scotland though, with a rather cold garage so getting from 85°C to pitching temp takes as little as 8 hours at this time of year.
     
    GerritT likes this.

Draft saved Draft deleted

Share This Page