How to make a twin coil immersion chiller

graysalchemy · Sep 30, 2010

graysalchemy said:
BigYin said:

If there's enough 10mm pipe left I'm certainly willing to make another, although they are bulky and heavy so they would be expensive to post :hmm:

Click to expand...

I send parcels by payperparcel.You can send 32kg for about Â£8.10 via DHL very good service. I send parcels with picture frames in with very little problems. :thumb: :thumb:

:

I say very little problems, they have managed to loose a parcel with some paintings in yesterday, and they expect me to ring them on an 0871 number :evil: :evil: :evil:

Not Happy :x :x :x

Aleman · Sep 30, 2010

graysalchemy said:
they expect me to ring them on an 0871 number :evil: :evil: :evil:

Say No To 0870

BigYin · Sep 30, 2010

BigYin said:
aneray said:

Let me know mate, I'm certainly very interested :thumb:

Click to expand...

I'll have a look over the weekend and see if I've got enough of the 10mm left to make you one

I've looked and I'm short of the 10mm pipe :hmm:

If another one or two people wanted one made it would be worth my while to invest a further Â£50 in more pipe.... :hmm:

graysalchemy · Sep 30, 2010

Aleman said:
graysalchemy said:

they expect me to ring them on an 0871 number :evil: :evil: :evil:

Click to expand...

Say No To 0870

Thanks for that aleman I have book marked it for future use.

They have decided that the parcel cannot be redirected their system won't allow it to be delivered to another area. However if I pay another Â£22.00 surprise surprise it will be with my client by 10am. Great service NOT. When does 24hr mean 2 days. Sorry for hijacking this thread, rant over, I feel better now.

jimny14 · Oct 12, 2010

Hi Big Yin, from a fellow diver and home brewer's point of view i'm guessing that you're using a 12l and a 3l steel for your coils. If i'm right i'll be feel like a right smart ****, but also if you're using something of a different size please let me know, i'd be very interested to know the sizes cos i fancy making a twin coil and have a selection of formers (cylinders) at my disposal. Thanks for your info.

Cheers James

BigYin · Oct 12, 2010

Think you are spot on there mate. The larger one is a 12l, and the smaller one is my pony tank - think it's 3l , although it's been a long time since I've used either of them for diving........

kebabman · Oct 18, 2010

Excellent tutorial!
I am sure you are right regarding having two coils but I was wondering for the same amount of water flowing through is it more efficient to have two coils, as being lazy I guess it would be a bit easier to make just have one coil diameter of the same total length of tubing.
Cheers

BigYin · Oct 18, 2010

where's the challenge in that :lol:

I can make you one if you want :thumb:

46.philh · Jan 29, 2011

All done thanks for the how to. :thumb:

Got supplies from http://gasproducts.co.uk

I used yorkshire ring fittings as not soldered before.

Made little mistake of fixing t joint in 2 places and then when worked out hight of top bit to go on to joint and the solder had all melted from previous joints.

Heated up and ran a little more solder in and turned out ok.

Water tested ok.

IC by 46.phil,

Tie wrap removed, just used to keep in place .

jampot · Mar 14, 2011

Whats the best way to get round a house full of mixer taps like mine. I would imagine the hose connection wouldnt fit on...

hairybiker · Mar 14, 2011

You can get tap connectors to fit on to mixer taps, they are large with a connection for the hose on the bottom and a hole you put the mixer into then screw down the top to get a seal.
(Like this one http://cgi.ebay.co.uk/HoZelock-Mult...denEquipment_HandTools_SM&hash=item3a63f51a7d B&Q/Tesco etc do them)

jampot · Mar 14, 2011

Thanks, are you sure that would work with something like this http://www.taps.co.uk/contemporary-cruc ... ink-mixer/

BigYin · Mar 14, 2011

Almost certainly. I've got a mixer tap and have one of those hose connectors on it. Works a treat :thumb:

cannon · Jun 8, 2011

Hi big yin,is the 15mm to 3/4'' coupler a compression fitting or is it soldered onto to the 15mm copper pipe,i ask as im making to sizes and thought i might only need to get one set of these if they can be transferable.

Cheers C.

pjbiker · Jun 8, 2011

jampot said:
Whats the best way to get round a house full of mixer taps like mine. I would imagine the hose connection wouldnt fit on...

If you want something a little less faffy and to retain the use of mixer tap in question. Even the most ham fisted of DIY plumbers can fix one of these onto a 15mm copper pipe. Best to turn you stop tap off while you do it though. You can screw a 3/4" BSP connector on it which you may have for your standard garden hosepipe

http://www.screwfix.com/p/self-cutting- ... Tap%2015mm

BigYin · Jun 8, 2011

cannon said:
Hi big yin,is the 15mm to 3/4'' coupler a compression fitting or is it soldered onto to the 15mm copper pipe,i ask as im making to sizes and thought i might only need to get one set of these if they can be transferable.

Cheers C.

The Screwfix one has a compression fitting at the 15mm end, so you just need a couple of spanners (one fairly big) to tighten it up, and ideally some ptfe tape for the threads to minimise risk of leakage there.

The hose adaptor then just screws on hand tight to the 3/4" end, and again, ptfe tape is very useful indeed.

hedgerow pete · Jun 8, 2011

we have mixer taps and so we use the shower head hose pipe as its a 3/4 thread we just unscrew the hose screw on the garden hose and away we go.

must admit we have to make a new one soon as the old one is damaged. as a question what is better thermaly speaking two coils seperatly fed from a 15mm tail or one single coil fed from the single source??

BigYin · Jun 8, 2011

hedgerow pete said:
as a question what is better thermaly speaking two coils seperatly fed from a 15mm tail or one single coil fed from the single source??

my understanding is that it is all about surface area.

a double coil gives more surface area in so much as it allows more coils to be fed by the single source, and since the coils have to be made of a narrower guage copper (so it can be bent into coils without the need for specialised equipment) they can pass less water through them than the tap can deliver, so again, two coils allow better use of the water delivered by the tap.

I'm not sure what THE most efficient chiller design would be, but a double coil is easy enough to build, and it works very well, so it seems like a very good compromise :drink:

Aleman · Jun 9, 2011

hedgerow pete said:
as a question what is better thermaly speaking two coils seperatly fed from a 15mm tail or one single coil fed from the single source??

If you consider right at the start of the chilling process the wort is so hot it is only the first couple of metres of the coil that is doing any cooling at all, then the more shorter coils you have that are fed separately from the mains the more effective the cooling. This is going to be true if the coil is 5m long or 100m long . . . .it's only the first couple of meters doing the chilling.

Once the wort has cooled sufficiently so that all the coil is effectively cooling, then the length of the coil becomes important . . . but only in terms of 'transit time' (the longer the coolant is in contact with the 'wort' the more effective it is at removing heat). With a double coil chiller all you need do is turn the flow rate down to increase the transit time.

As you add more coils the gain you get is reduced however, so a double coil chiller is probably the most effective design

hedgerow pete · Jun 9, 2011

thanks lads, just checking why thats all

How to make a twin coil immersion chiller

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