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Join Date: Apr 2010
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Dry Ice

04/24/2010 8:18 AM

Is the amount off dry ice enough in the container to cool 48 kg steel from 80 °C to 20 °C?

Container is W=0.8 m (0.58) Depth 0.6m (0.37) H= 1.05 m (0.69) (inside dimensions)

I have to open the container 16 times on 12 hours

0.4W/m2/°C

density of dry ice 1.2-1.6 kg/dm3

Specific heat 0.8kJ/kg/°C

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#1

Re: dry ice

04/24/2010 5:52 PM

I am trying to see where the amount of dry ice is specified....

If the container is completely full, where do you put the steel to cool it?

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Guru

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#2

Re: dry ice

04/24/2010 7:30 PM

Why in the world would you use dry ice for this? Cold water, lad, cold water.

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#3

Re: dry ice

04/25/2010 12:52 AM

Your post has abundant information. However, it is not connected in a logical manner.

How intimate is the dry ice in contact to the precious cargo?

What the hell are you trying to do?

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#4
In reply to #1

Re: dry ice

04/25/2010 7:13 AM

I can put 3 steel bars in the container on an holder.

There is 100mm of empty space in the container at the beginning.

Max amount of dry ice 5,8x3,7x5.9 dm =126dm3x1.3kg/dm3=163 kg

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#5
In reply to #2

Re: dry ice

05/02/2010 1:11 PM

Can you cool with water till - 30°C

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#6
In reply to #5

Re: dry ice

05/02/2010 1:15 PM

Your post said "20 °C".

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#7
In reply to #6

Re: dry ice

05/03/2010 3:34 AM

It is -30°C

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Guru

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#8
In reply to #7

Re: dry ice

05/03/2010 6:34 AM

Good luck with your homework, but try to get the numbers right next time.

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