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Salty Ice Cooling Tek


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#1 Xerces

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Posted 11 January 2007 - 04:56 PM

I'm just testing/developing this tek right now, so I'm not sure about the final product results, but here it is,

As some of you know, Fruiting temperature in my latitude may be tricky to achieve since right now its from 28*C (82.4*F) to 31*C (87.8*F).

So after some messy experimentation I think I found the best way to aproach this.

I cased 6 brf cakes in peat/verm inside a medium/small sided rubbermaid container.

The temp on the bottom of the lid (where the thermometer is fixed) showed 28*C and I could feel the heat emanating from the cakes in my face.

So I thought of the only cheap source of cold available: ICE.

Salt lowers the freezing point of water, this is called "colligative property".

So you must make your ice with plenty of salt, so it will take longer to de-froze.

You must leave the bag hanging carefully inside the FC.

A problem I encountered -specially because of the small size of the FC- is that the Ice Bag
made all the humidity in the FC get condensed ON IT, and drops of water would fall onto the cakes.

There's even the risk of creating a swamp under the ice bag.

So I wrapped the ice bag in this cloth-like yellow kitchen towel, that absorbs a lot of
humidity, that can itself, when the FC gets warming because of the ice melting,
will realease the humidity back to the enviroment.

One has to be very carefull at first calculating the humidity levels necessary.
If perlite is used, this shouldn't be a problem.

http://mycotopia.net...=1&d=1168552464



Let me know what you think, I'll let you know the results of this tek in a week or so. ;)

-Xerces

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#2 Xerces

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Posted 11 January 2007 - 05:26 PM

*Instead of the Salty Cubes, you can use "Refrigerant Gel" I just got like 5 bags for free at the pharmacy.

#3 Mycorama

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Posted 11 January 2007 - 05:34 PM

well i wouldnt use duct tape to hold your towel in place, you could use silicone, it would be perminate but it would work pretty well i think.

#4 papalion

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Posted 11 January 2007 - 05:41 PM

That sort of towel is often known as a chamois. pronounced shammy.
Hope it helps somebody.

#5 Guest_greysRDbest_*

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Posted 11 January 2007 - 09:17 PM

block ice melts alot slower than cubed ice. just a thought.

#6 Guest_Water_*

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Posted 11 January 2007 - 09:21 PM

Interesting idea.

Could using a simple cooler as a fruiting chamber help to keep temps low?

I've seen someone with a large fifty gallon cooler growing shrooms nicely, they just added a low wattage light to the inside top of the lid.

#7 Hippie3

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Posted 11 January 2007 - 09:35 PM

the fabric cloth is the key -
it will eliminate more heat than the ice
just by evaporating water into its gaseous state.
adding salt lowers the freezing point of water
meaning the ice can get it colder than otherwise possible,
those of us who've made home-made ice cream should be
familiar with that phenomenon.

#8 BuckarooBanzai

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Posted 11 January 2007 - 09:42 PM

Silicone makes crappy glue by itself.

I would experiment and see how much fresh air I could introduce while still keeping RH up.

The evaporative cooling effect will be much less effective at 99% RH than at 80% RH.

By the way, that type of setup is also called a "swamp cooler." Evaporation is actually the oldest refrigeration technique known to man.

#9 Hippie3

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Posted 11 January 2007 - 10:01 PM

the strongest silicon glue i've found is used to hold aquariums together

#10 Xerces

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Posted 11 January 2007 - 10:29 PM

New tek: I started hitting the camera that had previously stopped working days ago, and it worked again!

So here are some pics, plus you can tell me how my cakes are doing, how many contams, etc. No funny smells except humidity.

http://mycotopia.net...=1&d=1168572541
http://mycotopia.net...=1&d=1168572541
http://mycotopia.net...=1&d=1168572541
http://mycotopia.net...=1&d=1168572541
http://mycotopia.net...=1&d=1168572541

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#11 Xerces

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Posted 11 January 2007 - 10:32 PM

:eusa_shif


http://mycotopia.net...=1&d=1168572705
http://mycotopia.net...=1&d=1168572705
http://mycotopia.net...=1&d=1168572705
http://mycotopia.net...=1&d=1168572705
http://mycotopia.net...=1&d=1168572705
http://mycotopia.net...=1&d=1168572705

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#12 BuckarooBanzai

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Posted 11 January 2007 - 10:36 PM

Your cakes look GOOD, man! I see a few knots already!

I predict you will have visible pins within the next 72 hours (24-48 if you watch real close).

If you are getting a lot of dripping into the substrate material, you might consider lifting the tub up on an angle and drilling a hole at the lowest point (put a cup under the hole to collect the drips).

#13 Xerces

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Posted 11 January 2007 - 10:49 PM

Yes, this is mainly because of the bag of ice I had to put, and condensation, etc.

#14 Hippie3

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Posted 11 January 2007 - 10:50 PM

What am i looking at ?
casing material = ?
cake formula = ?

#15 Xerces

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Posted 11 January 2007 - 10:59 PM

I'm sorry, we've gone offtopic so I posted the pics in the original project thread.

#16 Hippie3

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Posted 11 January 2007 - 11:54 PM

you are telling me
that
i'm
off topic ?

:lol:

#17 Xerces

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Posted 12 January 2007 - 12:44 AM

no, man just that I'VE gone of topic ;)
The thread is or the coolingness rather that my cake's health.

Here are the pics of the .. my bizarre creation.....

Using gel now, its stays frozen for like 6 hours

This is when i open the lid and the gel is unfrozen:

http://mycotopia.net...=1&d=1168580485

http://mycotopia.net...=1&d=1168580485

Remove the melted gel


http://mycotopia.net...=1&d=1168580485

Replace with new gel bags

http://mycotopia.net...=1&d=1168580485

Secure cooling package to lid, mist walls and close.

http://mycotopia.net...=1&d=1168580485

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#18 joystik

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Posted 12 January 2007 - 11:00 AM

I apologize first of all for what im going to say, just in case It doesnt make much sense.

I have learned from a Friend (Siam_Jim) and by own experience (thanx to him) that It is not really necessary to lower temperatures so much to achieve fruiting if your temperatures are in the 28C - 32C range. I have these temps myself and have got my first successful cakes pinning for a few days now. I think the most important things to keep in mind are Humidity and FAE, and of course, patience.

I also thought that it was necesary to have the FC below 26C, but I found out the cubies would fruit in higher temps by keeping stable oxygen and water supplies. I also found out too much water is not so good.

So On your next experiment you might want to try omit the ice thing
, just keep things simple.

Hope it helps.:eusa_shif

Joy.

#19 Xerces

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Posted 12 January 2007 - 11:05 AM

Yea, maybe I complicated it too much and messed inside the FC trying to achieve lower temps.

I think I'll keep the ice gel directly on top and still lower the temp.




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