Then can you explain why it took much longer to cool down the wort when I
ran the water fast than when I ran it slow?
Andy
On 05/15/98 01:51 PM Trevor Boicey said...
>
>Andrew Dixon wrote:
>> If I let the
>> water run fast, it was still cool at the outlet and the wort took forever to
cool
>> down, while if I slowed down the flow of water it was hot enough at the
outlet
>> that I couldn't hold my hand under it and it sped up the cooling process.
>
> The TEMPERATURE of the water coming out may have been lower if you
>flow fast, but the heat content would be the same or more.
>
> You are heating up more water to a lesser temperature, instead of
>less water to a higher temperature.
>
> Look at it this way, if the water going into the coil is cold
>and the water coming out is hot, then the water in the middle
>of the coil is somewhere in the middle, we'll call it "warm".
>
> Because the coil there is only warm, it isn't absorbing as much
>heat from the vat as if it were cold. (see thermodynamics)
>
> Ideally, to remove as much heat from the vat as possible, keep
>the coil as cold as possible. This is what happens when you flowed
>the water fast.
>
> Try this at home: Turn on the tap full-hot and full-blast. Tell
>me if it's any easier to keep your finger in the stream. ;> You won't
>find that the water will move "too fast to conduct heat into your
>skin".
>
>--
>Trevor Boicey, Ottawa, Canada.
>tboicey@brit.ca, http://www.brit.ca/~tboicey/
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