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Sous vide – what to buy or ask for, for Christmas?

Modernist

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195 replies to this topic

#181 DiggingDogFarm

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Posted 29 January 2013 - 03:29 PM

I assume the rule-of-thumb, 5:1 water to food ratio applies regardless of the water volume, and as I said, I'll be working with a lot of large batches.
I also assume that circulation will be adequate, even in a large cooler, I ordered two extra bubblers.
Maybe it's overkill, but I like the piece of mind.
I'd much rather go overboard than worry, I have too many other things to worry about, I don't need to be adding any new worries.


~Martin

Edited by DiggingDogFarm, 29 January 2013 - 03:46 PM.

~Martin
 
Unsupervised rebellious and radical farmer, minimalist penny-pincher, self-reliant homesteader and adventurous cook. Crotchety cantankerous terse curmudgeon, nonconformist and contrarian who questions everything!
 


#182 PedroG

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Posted 29 January 2013 - 04:51 PM

. . . .
With my big 20 qt rice cooker, I never had a problem with just passive circulation.
. . . .


The myth of passive circulation during steady state has been debunked, see http://egullet.org/p1823461 !
Natural convection occurs only during ramping up at full power, in steady state with a power consumption of some 30-100W, there is no noticeable convection current.
And without circulation, surface heat transfer coefficient is significantly lower, see http://egullet.org/p1799312 .
Regarding bag position, see my article "Impact Of Bag Position On Temperature Uniformity".
Peter F. Gruber aka Pedro
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#183 DiggingDogFarm

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Posted 29 January 2013 - 05:18 PM

The myth of passive circulation during steady state has been debunked, see http://egullet.org/p1823461 !
Natural convection occurs only during ramping up at full power, in steady state with a power consumption of some 30-100W, there is no noticeable convection current.
And without circulation, surface heat transfer coefficient is significantly lower, see http://egullet.org/p1799312 .
Regarding bag position, see my article "Impact Of Bag Position On Temperature Uniformity".


Very compelling videos and info!

Thanks, Pedro!


~Martin

~Martin
 
Unsupervised rebellious and radical farmer, minimalist penny-pincher, self-reliant homesteader and adventurous cook. Crotchety cantankerous terse curmudgeon, nonconformist and contrarian who questions everything!
 


#184 seabream

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Posted 30 January 2013 - 01:44 PM


. . . .
With my big 20 qt rice cooker, I never had a problem with just passive circulation.
. . . .


The myth of passive circulation during steady state has been debunked, see http://egullet.org/p1823461 !
Natural convection occurs only during ramping up at full power, in steady state with a power consumption of some 30-100W, there is no noticeable convection current.
And without circulation, surface heat transfer coefficient is significantly lower, see http://egullet.org/p1799312 .
Regarding bag position, see my article "Impact Of Bag Position On Temperature Uniformity".


Pedro - This is precious information - thanks!

My setup right now is a small rice cooker with no forced circulation, where I place one single small bag on a horizontal rack, with a SVM controller. Pretty basic, but I'm guessing also pretty common among home sous vide users.
Based on your experiments, in this setup, it seems that differences of temperature in the water are not significant (I always close the lid of the rice cooker). However, heat transfer is delayed because of lack of circulation.

I was wondering if I should start using an aquarium bubbler in my setup. However, it seems that simply cooking the ingredients at the higher time recommended would achieve results equivalent to a setup with circulation. Is this correct?

I was also wondering if it's worth making a rack to keep bags vertical in the rice cooker. My conclusion from looking at your tests is that it's not. If a covered bath with no circulation using bags in horizontal position only varies 0.1 - 0.2 C in temperature, I see no point in going through the trouble. The water temperature difference is not significant. Unless there are other implications of keeping bags horizontal that I'm not taking into account.

Would love for people to comment on this.

Edited by seabream, 30 January 2013 - 01:45 PM.


#185 nickrey

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Posted 30 January 2013 - 02:30 PM

I notice Pedro hasn't mentioned his additional trick of sealing some marbles in one side of the bag, which becomes the lower side of the bag in the container and helps to keep the bags both submersed and vertical.

Nick Reynolds, aka "nickrey"

"My doctor told me to stop having intimate dinners for four.
Unless there are three other people." Orson Welles
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#186 PedroG

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Posted 30 January 2013 - 04:06 PM

I notice Pedro hasn't mentioned his additional trick of sealing some marbles in one side of the bag, which becomes the lower side of the bag in the container and helps to keep the bags both submersed and vertical.

I did mention yesterday: http://egullet.org/p1907400 (post #175)
Peter F. Gruber aka Pedro
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#187 nickrey

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Posted 30 January 2013 - 05:48 PM


I notice Pedro hasn't mentioned his additional trick of sealing some marbles in one side of the bag, which becomes the lower side of the bag in the container and helps to keep the bags both submersed and vertical.

I did mention yesterday: http://egullet.org/p1907400 (post #175)

The second link in that post was dead for me.

Nick Reynolds, aka "nickrey"

"My doctor told me to stop having intimate dinners for four.
Unless there are three other people." Orson Welles
My eG Foodblog


#188 PedroG

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Posted 31 January 2013 - 02:03 AM


PedroG - I couldn't find the pictures with the skewer. Would be great if you could post them again or point us to your previous post, if it's not too much trouble.
. . . .

See http://egullet.org/p1838487 and http://egullet.org/p1744874
Edit: sometimes it's faster to search Google e.g. "eGullet, PedroG, skewer" than to use eGullet's search function.



I notice Pedro hasn't mentioned his additional trick of sealing some marbles in one side of the bag, which becomes the lower side of the bag in the container and helps to keep the bags both submersed and vertical.

I did mention yesterday: http://egullet.org/p1907400 (post #175)

The second link in that post was dead for me.

DOH! A dot at the end mutilated the URL. Now it works.
Peter F. Gruber aka Pedro
eG Ethics Signatory

#189 DiggingDogFarm

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Posted 01 February 2013 - 02:16 PM

I received the two SVS pouch racks today.
The measurements are ~ 6-1/4" X 6-1/2" X 6-1/2"
Slot width is ~1-7/8".
Much smaller than I expected.
I don't know where the above measurements came from.
I'm a little upset at SVS.
I asked for the measurements before ordering but rather than give me the measurements, they just sent a link to machine specs, and of course, it was every spec except the pouch rack measurements!

The cooler I plan to use would easily hold 4 more racks.

It's always good to set expectations real low, that way you won't be disappointed!!! LOL


~Martin

~Martin
 
Unsupervised rebellious and radical farmer, minimalist penny-pincher, self-reliant homesteader and adventurous cook. Crotchety cantankerous terse curmudgeon, nonconformist and contrarian who questions everything!
 


#190 rotuts

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Posted 01 February 2013 - 02:24 PM

so far, DDF, no pic.

so far.

#191 DiggingDogFarm

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Posted 01 February 2013 - 02:26 PM

What do you want to see?



~Martin

~Martin
 
Unsupervised rebellious and radical farmer, minimalist penny-pincher, self-reliant homesteader and adventurous cook. Crotchety cantankerous terse curmudgeon, nonconformist and contrarian who questions everything!
 


#192 rotuts

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Posted 01 February 2013 - 02:36 PM

your results. step by step and on the Plate!

Happy Cooking!

#193 DiggingDogFarm

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Posted 01 February 2013 - 02:40 PM

I haven't got a lot of extra time this time of year, but I'll try to take some pics and post them.


~Martin

~Martin
 
Unsupervised rebellious and radical farmer, minimalist penny-pincher, self-reliant homesteader and adventurous cook. Crotchety cantankerous terse curmudgeon, nonconformist and contrarian who questions everything!
 


#194 seabream

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Posted 01 February 2013 - 03:15 PM

DDF - Thanks for posting the measurements. That makes more sense - I can see in their site that the rack is almost cube shape.

#195 Syzygies

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Posted 08 February 2013 - 03:55 PM

There are a few other circulators on the horizon:

http://shop.nomiku.com (Nomiku)
http://www.waterbath...e_products.html (Anova)
http://www.swid.eu/en/ (110V Swid)


Nomiku hasn't changed its target date of March 2013. Anova's page now announces "(Coming March 2013)". The year is a nice touch, as SWID's site FAQ offers the hope that a 110V version will be available at "the end of the year." I have to wonder what year that was.
Per la strada incontro un passero che disse "Fratello cane, perche sei cosi triste?"
Ripose il cane: "Ho fame e non ho nulla da mangiare."

#196 nickrey

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Posted 08 February 2013 - 07:56 PM


Nickrey, how did you go with Vac Star replacement? I got mine last week and it is a different animal! I can see that it circulates the water much better than the old one. WIth old one, eggs were sitting on the bottom, the new one moves them around my box.

I did not have to send the defect one for repair any more. Do you think there is way to fix it? The thermometer and the electronics work, it is probably this bent motor axis that is causing trouble...


Still waiting for a reply. Have written again (this time to service rather than to sales rep). Will let you know.


I have an update. They were very prompt when I sent the email to the correct person.

They are going to do the same as they did for you, send me a new unit under warranty. I'm very impressed with their after-care service.

Update on this, I've received the replacement unit and it works extremely well. The circulation on this machine is very powerful.

Nick Reynolds, aka "nickrey"

"My doctor told me to stop having intimate dinners for four.
Unless there are three other people." Orson Welles
My eG Foodblog






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