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  • Boiler Sizing

    How to size a brewery boiler?

  • #2
    Hi, Dheeraj. Your best bet is to talk directly with whomever is supplying your brewhouse equipment and the boiler. Many factors play into sizing a boiler, including your daily operations, number of steam jackets, desired rate of rise, the size of the system, heat loss from the piping, and so forth. As a rule of thumb, the MBAA recommends 50,000 Btuh per barrel of capacity. Your boiler manufacturer and equipment supplier should be able to appropriately size a boiler for you.
    _
    Jeremy King, Brewery Design Consultant, Experienced Commercial Brewer
    Craft Kettle Brewing Equipment
    New Orleans, LA
    jeremy.king@craftkettle.com
    o 855.953.8853 | d 504.930.4462 | c 763.528.1352

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    • #3
      Originally posted by Dheeraj View Post
      How to size a brewery boiler?
      It mainly depends on brewhouse capacity, brewhouse combination as well allowable steam working pressure. Take 10BBL system as example, if the brewhouse combination is MLT + KWT + HLT, with 2 bar working pressure, 220,000 BTU steam boiler is OK. But if the brewhouse combination is MT + LT + KWT + HLT with 1 bar working pressure, we may need to work with bigger one, 660,000BTU steam boiler would better. If you want to get more specific details for your brewery, we can discuss further.

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      • #4
        Originally posted by Derrick View Post

        It mainly depends on brewhouse capacity, brewhouse combination as well allowable steam working pressure. Take 10BBL system as example, if the brewhouse combination is MLT + KWT + HLT, with 2 bar working pressure, 220,000 BTU steam boiler is OK. But if the brewhouse combination is MT + LT + KWT + HLT with 1 bar working pressure, we may need to work with bigger one, 660,000BTU steam boiler would better. If you want to get more specific details for your brewery, we can discuss further.
        Your example is correct but I am not sure why you would offer high pressure boiler for small brewery.

        Comment


        • #5
          Originally posted by Dheeraj View Post
          How to size a brewery boiler?
          Hi,

          If you only power for brewhouse,
          normally 50KG/H steam boiler is suggested for brewery below 500L capacity.
          100KG/H for 500-1000L brewery.
          150KG/H for 1000-1200l brewery
          200KG/H for 1500L-2000l brewery.
          Contact with us to get our calculations for steam boiler.

          Cheers,
          Brewman Machinery Equipment Co.


          Comment


          • #6

            FWIW - from an old spreadsheet I developed 30 years ago. Hasn't let me down so far. Assumptions listed. I would go with the 600kBTU output myself.
            Assume: evap loss 1.5%/hr, boiling loss 5%/hr
            Assume : Sp. heat grains 0.42, Sp. heat water: 1.0, Sp. heat wort: 0.92
            Assume: Single step downward infusion mash, mashing off to 170 F
            Water Requirements:
            Sparge volume ratio - bbl/100 lbs material 1.60
            Mash volume ratio - bbl/100 lbs material 1.25
            Incoming water - F (assume cooling recapture) 150.00
            Average temp process water - F 170.00
            Total water requirements - bbl 14.44
            Total water heat requirements - BTU 74779.00
            Mash Lauter Tun Requirements
            bbl equivalents 8.47
            Process time - min 70.00
            Conversion temp - F 150.00
            Mash off temp - F 170.00
            Evap loss - BTU 33627.26
            Raising temp - BTU 43874.60
            Warming equip/radiative loss - % 12.00
            Warming equip/radiative loss - BTU 10568.44
            TOTAL MASH TUN - BTU 88070.30
            Target plato
            12.50
            At target plato, lbs extract/bbl 33.94
            Weight of grist - lbs 506.53
            Target volume at strikeout - bbl 10.00
            Volume foundation water - bbl 6.33
            Volume of mash - bbl 7.65
            Runoff process time - min 120.00
            Boil time - min 60.00
            Contraction on cooling - 4% - bbl 0.40
            Evap compensation - bbl 0.30
            Boil compensation - bbl 0.50
            Actual vol. sent to kettle - bbl 11.20
            Plato of wort 12.50
            Avg. temp wort and spargings - F 165.00
            Warming wort - BTU 131484.19
            Evap. loss - BTU 84413.28
            Boiling loss - BTU 140688.80
            Warming equip loss - % 2.00
            Radiative loss % 10.00
            TOTAL KETTLE - BTU 405211.67
            TOTAL HEAT PER BREW
            TOTAL WATER - BTU 74779.00
            TOTAL MASH TUN - BTU 88070.30
            TOTAL KETTLE 405211.67
            TOTAL per brew - BTU 568060.98

            Good luck,

            Pax.

            Liam
            Liam McKenna
            www.yellowbellybrewery.com

            Comment


            • Brewman
              Brewman commented
              Editing a comment
              Professional calculation, thumb up for you:-)

              Cheers,
              Brewman Machinery Equipment Co.

          • #7
            Originally posted by liammckenna View Post
            FWIW - from an old spreadsheet I developed 30 years ago. Hasn't let me down so far. Assumptions listed. I would go with the 600kBTU output myself.
            Assume: evap loss 1.5%/hr, boiling loss 5%/hr
            Assume : Sp. heat grains 0.42, Sp. heat water: 1.0, Sp. heat wort: 0.92
            Assume: Single step downward infusion mash, mashing off to 170 F
            Water Requirements:
            Sparge volume ratio - bbl/100 lbs material 1.60
            Mash volume ratio - bbl/100 lbs material 1.25
            Incoming water - F (assume cooling recapture) 150.00
            Average temp process water - F 170.00
            Total water requirements - bbl 14.44
            Total water heat requirements - BTU 74779.00
            Mash Lauter Tun Requirements
            bbl equivalents 8.47
            Process time - min 70.00
            Conversion temp - F 150.00
            Mash off temp - F 170.00
            Evap loss - BTU 33627.26
            Raising temp - BTU 43874.60
            Warming equip/radiative loss - % 12.00
            Warming equip/radiative loss - BTU 10568.44
            TOTAL MASH TUN - BTU 88070.30
            Target plato
            12.50
            At target plato, lbs extract/bbl 33.94
            Weight of grist - lbs 506.53
            Target volume at strikeout - bbl 10.00
            Volume foundation water - bbl 6.33
            Volume of mash - bbl 7.65
            Runoff process time - min 120.00
            Boil time - min 60.00
            Contraction on cooling - 4% - bbl 0.40
            Evap compensation - bbl 0.30
            Boil compensation - bbl 0.50
            Actual vol. sent to kettle - bbl 11.20
            Plato of wort 12.50
            Avg. temp wort and spargings - F 165.00
            Warming wort - BTU 131484.19
            Evap. loss - BTU 84413.28
            Boiling loss - BTU 140688.80
            Warming equip loss - % 2.00
            Radiative loss % 10.00
            TOTAL KETTLE - BTU 405211.67
            TOTAL HEAT PER BREW
            TOTAL WATER - BTU 74779.00
            TOTAL MASH TUN - BTU 88070.30
            TOTAL KETTLE 405211.67
            TOTAL per brew - BTU 568060.98

            Good luck,

            Pax.

            Liam
            Hi, Could you please share reference for these calculations?

            Thanks

            Comment


            • #8
              Originally posted by Thirsty_Monk View Post

              Your example is correct but I am not sure why you would offer high pressure boiler for small brewery.
              The working pressure normally at 2 bar either for small brewery or micro brewery. In United States or Canada, local government has regulations to work pressure, at 1 bar. So in order to assure efficient heating, it is better to work with enough bigger boiler.

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