Shotgun question

Parrots beaks, valves, condensers, and all other hardware for stilling.

Shotgun question

Postby Knackerbag » Sat Apr 25, 2020 10:24 pm

Hey brains trust, I’m making my 4” pot and was planning to put 2x 3600w elements in it. I was planning a 2 inch shotgun but was starting to think maybe I should stay 4” all the way through. Any thoughts ?
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Re: Shotgun question

Postby Maxxx » Sun Apr 26, 2020 7:47 am

Hey knackerbag
2” shotgun in stainless with 6 or 7 tubes at 750mm long will knock down twin 3600 watts but will need a reasonable amount of water
You say all the way through 4” do you mean from the highest point of the column down to the shotgun or are you thinking of a 4” shotgun :o
Cheers
Maxxx
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Re: Shotgun question

Postby Doubleuj » Sun Apr 26, 2020 7:56 am

My 2” knocks down 8400w, I have 2 x 2400w and 1 x 3600w elements, proper over kill but hey 8-}
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Re: Shotgun question

Postby db1979 » Sun Apr 26, 2020 8:05 am

Yeah stick with 2" for the condenser. As maxxx said, 750 mm with 7 x 1/2" internal tubes should be fine. You could probably go shorter. In stripping runs you'll use both elements, but in spirit runs you definitely won't want to run full power. You could get away with a much shorter shotgun for your spirit runs. It's your stripping runs that you'll need to design your condenser for. It won't matter if your product comes out a little bit warm on a stripping run, so long as there's no vapour coming out too. If it stays below 35 degrees I'd be happy. Just use a power controller on your stripping run to keep the power input to a level your cooling system can handle. You'll need a power controller for spirit runs anyway.

The efficiency of the shotgun isn't just based on length and internal tube numbers or sizes, water flow rate and baffles inside the condenser can also affect it significantly.
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Re: Shotgun question

Postby Maxxx » Sun Apr 26, 2020 8:08 am

Doubleuj wrote:My 2” knocks down 8400w, I have 2 x 2400w and 1 x 3600w elements, proper over kill but hey 8-}


Just out of curiosity what’s your heat up timer with that many watts on a keg boiler
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Re: Shotgun question

Postby Doubleuj » Sun Apr 26, 2020 8:23 am

I’ve got a 100L milk can and it’s a tad over 1hr to come up to temp :music-deathmetal:
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Re: Shotgun question

Postby Knackerbag » Sun Apr 26, 2020 9:56 am

Maxxx wrote:Hey knackerbag
2” shotgun in stainless with 6 or 7 tubes at 750mm long will knock down twin 3600 watts but will need a reasonable amount of water
You say all the way through 4” do you mean from the highest point of the column down to the shotgun or are you thinking of a 4” shotgun :o
Cheers
Maxxx



Thanks Maxxx, it’s 4” column that I was going to reduce to 2 inch before the PC but really want to be able to operate as fast as possible without compromising quality.
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equipment: 2" Boka
Bumblebee 4" Bubbler (early stages of production)

Re: Shotgun question

Postby Knackerbag » Sun Apr 26, 2020 9:59 am

Doubleuj wrote:My 2” knocks down 8400w, I have 2 x 2400w and 1 x 3600w elements, proper over kill but hey 8-}



What’s the length of your condenser mate?
Knackerbag
 
Posts: 163
Joined: Thu Dec 08, 2016 11:10 am
Location: Melbourne
equipment: 2" Boka
Bumblebee 4" Bubbler (early stages of production)

Re: Shotgun question

Postby Knackerbag » Sun Apr 26, 2020 10:02 am

db1979 wrote:Yeah stick with 2" for the condenser. As maxxx said, 750 mm with 7 x 1/2" internal tubes should be fine. You could probably go shorter. In stripping runs you'll use both elements, but in spirit runs you definitely won't want to run full power. You could get away with a much shorter shotgun for your spirit runs. It's your stripping runs that you'll need to design your condenser for. It won't matter if your product comes out a little bit warm on a stripping run, so long as there's no vapour coming out too. If it stays below 35 degrees I'd be happy. Just use a power controller on your stripping run to keep the power input to a level your cooling system can handle. You'll need a power controller for spirit runs anyway.

The efficiency of the shotgun isn't just based on length and internal tube numbers or sizes, water flow rate and baffles inside the condenser can also affect it significantly.



Thanks DB I just don’t want to build a 4” column with 7200w and then find the condenser can’t keep up on the stripping runs.
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Posts: 163
Joined: Thu Dec 08, 2016 11:10 am
Location: Melbourne
equipment: 2" Boka
Bumblebee 4" Bubbler (early stages of production)

Re: Shotgun question

Postby Doubleuj » Mon Apr 27, 2020 11:52 am

Knackerbag wrote:
Doubleuj wrote:My 2” knocks down 8400w, I have 2 x 2400w and 1 x 3600w elements, proper over kill but hey 8-}



What’s the length of your condenser mate?


It’s about 650mm long with 4 internals I think
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Re: Shotgun question

Postby Knackerbag » Tue Apr 28, 2020 6:30 pm

Doubleuj wrote:
Knackerbag wrote:
Doubleuj wrote:My 2” knocks down 8400w, I have 2 x 2400w and 1 x 3600w elements, proper over kill but hey 8-}



What’s the length of your condenser mate?


It’s about 650mm long with 4 internals I think



Ok cool, I think I have enough material for a 750 long shotgun and will try to fit 7-8 internals.
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equipment: 2" Boka
Bumblebee 4" Bubbler (early stages of production)

Re: Shotgun question

Postby RC Al » Tue Apr 28, 2020 6:59 pm

8 will fit and is just within the minimum specs from the math I posted here:
viewtopic.php?f=36&t=13317&start=40#p229303
https://www.engineeringtoolbox.com/smal ... _1849.html

But you going to have to be good to get it to not leak with around 5mm between tubes
Props to you if you can manage it :handgestures-thumbupleft:
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Re: Shotgun question

Postby Doubleuj » Tue Apr 28, 2020 11:55 pm

Doubleuj wrote:
Knackerbag wrote:
Doubleuj wrote:My 2” knocks down 8400w, I have 2 x 2400w and 1 x 3600w elements, proper over kill but hey 8-}



What’s the length of your condenser mate?


It’s about 650mm long with 4 internals I think


Just to shame myself, it’s almost an exact replica of the FSD 2” condenser, but after all my trials and fuck ups im sure it cost me way more :crying-blue:
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Re: Shotgun question

Postby Knackerbag » Wed Apr 29, 2020 1:34 pm

RC Al wrote:8 will fit and is just within the minimum specs from the math I posted here:
https://aussiedistiller.com.au/viewtopi ... 40#p229303
https://www.engineeringtoolbox.com/smal ... _1849.html

But you going to have to be good to get it to not leak with around 5mm between tubes
Props to you if you can manage it :handgestures-thumbupleft:


Thanks RC I’ll give it a crack.
Knackerbag
 
Posts: 163
Joined: Thu Dec 08, 2016 11:10 am
Location: Melbourne
equipment: 2" Boka
Bumblebee 4" Bubbler (early stages of production)

Re: Shotgun question

Postby Knackerbag » Wed Apr 29, 2020 1:35 pm

Doubleuj wrote:
Doubleuj wrote:
Knackerbag wrote:
Doubleuj wrote:My 2” knocks down 8400w, I have 2 x 2400w and 1 x 3600w elements, proper over kill but hey 8-}



What’s the length of your condenser mate?


It’s about 650mm long with 4 internals I think


Just to shame myself, it’s almost an exact replica of the FSD 2” condenser, but after all my trials and fuck ups im sure it cost me way more :crying-blue:



I already have the copper so I may aswell try, if all fails I’ll have to buy the fsd one.
Knackerbag
 
Posts: 163
Joined: Thu Dec 08, 2016 11:10 am
Location: Melbourne
equipment: 2" Boka
Bumblebee 4" Bubbler (early stages of production)


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