On Monday, January 20, 2014 2:14:33 PM UTC-5, micky wrote:
On Mon, 20 Jan 2014 07:35:58 -0500, Stormin Mormon

wrote:



Weather forecast for this week is windy, gusts

up to 45 MPH, and also temps near zero F.



Will the wind chill make it more likely for me

to freeze pipes? Compared to still air?



If your pipes don't perspire or leak, if they're not wet on the outside,

wind chill is not a factor.

BS. Following that theory, a car radiator is transfering just
as much heat with no air moving through it as it is with a high
volume of air moving through it.


It doesn't exist for pipes that are not

wet on the outside.

Wrong. If you have a brick that is 100F and you put it
outside when it's 50F, does it cool off faster with or without
a fan blowing on it?



Even though plenty of people talk like it does.



It doesn't exist for cars, either, unless they are wet on the outside.

Not "were wet" but "are wet".



Then feel free to block the airflow to your radiator. It will
still transfer the same amount of heat, right?



It exists for people, who perspire, a little bit everywhere I think.

The wind blows across the wet skin, even so slightly wet that it doesn't

feel wet, and the water draws heat from the skin as it evaporates.

You completely ignore the heat removed by *convection*. It doesn't
have to be wet. If it is wet, then yes that increases the heat
transfer.



The quantity of heat needed to make water evaporate, the heat of

vaporization, is the same as the heat required to raise the temperature

of the same amount of water by 15 or 20 degrees, iirc. It's the same

amount of heat needed by water about to boil on a stove, to go from

water to water vapor, although I guess one cannot tell by looking how

much heat that is.



Which has nothing to do with the situation at hand.



I don't know about other animals. Dogs pant, but do they in very cold

weather? Probably not,

And people don't sweat on their exposed skin when it's 15F either.




and I've never heard of a dog's tongue freezing

because of wind chill. They probably keep their tongues in their

mouths.





When it's near zero F, and winds of 45 MPH,



The wind doesn't matter, but the 0F does.



Of course the wind matters. You think it takes just as much
energy to heat a house when it 0 with a 45 MPH wind and without?
Good grief.



should I leave a faucet dripping?



If it is actually zero where the pipe is, yes.



Just if it's zero? Just a drip? Good grief.




LIke under the trailer maybe, where it's not heated? What do other

people with trailers do? If you live in a trailer park, you'd find more

people who know abou tthis there than you willl here. Or at least they

should know what they do and what happens to their pipes when they do

it. Even if you don't live in one, go visit one and ask them.

Yes, great idea. I live in a house and I should go survey
folks who live in a trailer. Good grief.


Isn't

there usually a manager. He should know what to do.



Would it be better to leave a hot drip, or a

cold drip?



Whichever pipe is exposed to the very cold temperature. Both of them,

if that is the case.



And I'll bet if the pipes are really exposed to the very cold, eg 0F
number you cited, that they will freeze with just a drip anyway.
The lower the temp, the more exposed, the more water you need flowing.




What was the agreement, last time I asked? I think

we all on the list agreed about our answers.



I vaguely remember someone called me an idiot.



I can see why.