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Posts Tagged ‘immersion cooler

Just a few snaps of an old project, this was built for Hopzine Rob and was recently used by Broadford Dave 🙂

Dual Helix Wort ChillerDual Helix Wort Chiller
Dual Helix Wort ChillerDual Helix Wort Chiller
Dual Helix Wort ChillerDual Helix Wort Chiller

No other info, it was a while ago that I made this 🙂

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London Porterish – This is a bit of a user-upper / Christmas gift / Christmas beer / a beer I only recently tasted at a beer fest and thought was amazing (Fullers London Porter). So this recipe is based around the one in the Graham Wheeler book, though a touch of Wheat malt added for head and the mix of Crystal malts is using up odd ends of malt. Hops are Sovereign which I have never used before.

Fermentables:
Pale Malt – 3990g – 70%
Brown Malt –  625g – 11%
Crystal Malt – 340g – 6%
Wheat Malt – 285g – 5%
Chocolate Malt – 225g – 4%
Crystal Rye Malt – 170g – 3%
Crystal Malt, Dark – 57g – 1%

Hops:
Sovereign @ 60 mins – 56g
Sovereign @ 10 mins – 19g

Final Volume: 23 Litres
Original Gravity: 1.058
Final Gravity: 1.015
Alcohol Content: 5.6% ABV
Total Liquor: 34 Litres
Mash Liquor: 13.7 Litres
Mash Efficiency: 80 %
Bitterness: 33 EBU
Colour: 144 EBC
60min Mash @ 68c
60min Boil
Cooled to 21c before pitching yeast
Mash treated with General Profile in the GW water treatment calc
3g of common Salt added to copper at the end of the boil

Updates on my Twitter-T.watter page – https://twitter.com/pdtnc
Malts, Temp & Salt additions:
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The three tier:
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Waste of time checking pH as usual:
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Mash efficiency 95.3%!:
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First runnings being recycled, FWH & old yeast ready in copper:
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10min hop addition:
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StarSan-ing everything that will touch sterile clean wort:
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My Mash was on at 8.05am
The Boil started at 10.30am
I collected 30litres @ 13.5 Brix
Cooling from boiling took 10mins & 44Litres of water to 33c, then 3mins more to 21c. The 44L was collected in the HLT @ 42c
Original Gravity was 1056 with hydrometer, 14.9 Brix with refractometer (1058, Bang on to recipe) 🙂
Started Run-off to FV at 12:00, taking it slowly probably took the best part of an hour.
The Wort & Hops were smelling lovely 🙂

*Bottled 17th Nov ’10 with 65g of Soft Brown Sugar Came down to FG 1020 ish, needs some age for the dark malts to meld into something lush 🙂

Making my Immersion cooler:
I made the aluminium spacer strips to hold the coils about 5mm apart, the strips also let it sit nicely on the bottom of my stockpot boiler without interfering with the hop strainer.
I wound the 10 metres of 10mm Diameter copper around a small 15 litre bucket which left it quite neat then knocked up the ally strips at work last night, just had to add a short length of bent 15mm pipe to get the coils end points closer so I could bring the inlet/outlet pipe closer together so I can cable tie them when I’m done.
I have the hose connections pointing horizontal with 2x 10mm solder-ring reducers which fit nicely in the end of the garden hose to be jubilee clipped:



Soldered up and connected:
No leaks…

Cooling test Update:
Warming up, bits of pipe scum coming loose and floating…

On the boil:

The Cooling results are, from 100 Deg C:
7mins – 49 C
10mins – 39 C
15mins – 28 C
20mins – 23.6 C
25mins – 21 C
I had to get my stopwatch out and stirred the water at least every 2 minutes, the boil was of roughly 30 litres, I’ll only be brewing and cooling about 12 L in reality.
IC is nice and clean now ready for Saturdays brewday 🙂

Thoughts on cooling wort!
You use a 10-15 meter coil to make either a Counterflow cooler(CFC) or a Immersion cooler(IC)….
In the case of the CFC, could you slow down the flow of Hot Wort and speed up the flow of cooling water and thus reduce the length of your copper coil?
I’m just in the making of something that I think will speed up my Boil-to-Pitching temperature time even if it doesn’t entirely chill things down, mainly as an interim measure to either buying or making an IC, but also as a bit of an experiment…
🙂


The unequal T’s are 15x15x22mm from B&Q
The Spiral bit it a bendy tap connector also from B&Q
The Pipe is 22mm and there are a couple of 15mm bits in there too
…the other fittings are from Screwfix and just standard 15mm connectors.
I intend to restrict the flow of the 15mm down to 8 or 10 at the out-end.
Soldering it up, added a 15mm compression nut to attach to boiler and a 15-8mm reducer to restrict the flow.

I’ve ordered some bits, garden hose, Tap connector and hose quick releases.
I’m ready to go… Brewday today 🙂 while we’re off work.

Apparently its almost exactly the design of a piece of Chemistry equipment – Allihn condenser – http://en.wikipedia.org/wiki/Condenser_(laboratory)
🙂
***OK then…
****Well its just been tested!
Left the boiler to settle for 20 mins from boiling, hooked up my bits of copper pipe and garden hose and turned on the cold water.

At a sensible flow rate of wort it was able to cool to 55°C
At a slow trickle I can get it down to 34°C
I ended up with 13 Litres of wort @ 45°C in the FV (with lots of flow rate changes and temperature checks)
If I’d let it trickle it would have taken ages to empty the boiler so it had to sit in the bath cooling off some more.

Here’s the pics:


It does prove that if you were to gang 3 or 4 of these up you could probably get a lower temperature and a faster flow, but that goes against my simplistic idea, I’m now going to go buy a coil of 10mm copper pipe… 10,15,20 metres??? and make a proper IC coil! 🙂


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