[TheForge] winter storm and equipment

Mon Jan 6 10:09:48 EST 2014

Alternative formulae for wind chill available at

http://en.wikipedia.org/wiki/Wind_chill

On Mon, Jan 6, 2014 at 8:43 AM, Bruce . <freemab222 at gmail.com> wrote:

> Re: wind chill.
>
> Any object warmer than ambient will be cooled by wind chill till it is no
> longer above ambient.  (An object cooler than ambient can likewise be
> heated.)
>
> Any object wet with water or other volatile liquid will be cooled until
> either the liquid is gone or the "dew point" of the liquid in the air has
> been reached.  (This is the same phenomenon in use in A/C systems and
> refrigerators.)  In principle, there is no limit to such cooling, aside
> from the dew point, but in practice the volatility of the liquid decreases
> as the temperature of the object (or the air) decreases, so there is an
> effective limit, approached asymptotically.
>
> In the case of water, the dew point is an obvious parameter, related to
> relative humidity.  In the case of other liquids, it is unlikely that the
> air will reach the dew point w/Re: these liquids, so the calculation can
> assume all of the liquid will evaporate.
>
> I'm not an engineer, so I won't submit a formula.  However the temperature
> drop relates to the heat capacity of the object being cooled, the heat
> capacity of the liquid, and the mass of each.
>
> Bruce
> NJ
>
>
> On Mon, Jan 6, 2014 at 9:32 AM, Mike Mastrangelo <
> mikemastrangelo100 at gmail.com> wrote:
>
> > Also from National Weather Service
> >
> >
> >
> > *10. How is the Windchill is calculated?*
>  >
> > The wind chill temperature is calculated using the following formula:
> >
> > Windchill (ºF) = 35.74 + 0.6215T - 35.75(V^0.16) + 0.4275T(V^0.16)
> >
> > Where: T = Air Temperature (F)
> > V = Wind Speed (mph)
> > ^ = raised to a power (exponential)
> >
> > Windchill Temperature is only defined for temperatures at or below 50
> > degrees F and wind speeds above 3 mph. Bright sunshine may increase the
> > wind chill temperature by 10 to 18 degrees F.
> >
> >
> > On Mon, Jan 6, 2014 at 8:31 AM, <wmullett at bright.net> wrote:
> >
> > > Wind chill only affects exposed moisture - like your on your skin.  It
> > has
> > > no affect otherwise.
> > >
> > > ---- Original message ----
> > > >Date: Mon, 6 Jan 2014 14:26:00 +0000
> > > >From: theforge-bounces at mailman.qth.net (on behalf of Ron Childers <
> > > ron at munlaw.net>)
> > > >Subject: Re: [TheForge] winter storm and equipment
> > >  >To: Blacksmithing List Sponsored by ABANA <theforge at mailman.qth.net>
> > > >
> > > >How much does wind chill affect the freezing of a water tank, pipes,
> > etc?
> > > What is the formula for computing wind chill?
> > > >
> > > >-----Original Message-----
> > > >From: theforge-bounces at mailman.qth.net [mailto:
> > > theforge-bounces at mailman.qth.net] On Behalf Of Dan Brewer
> > > >Sent: Sunday, January 05, 2014 11:58 PM
> > > >To: terry l. ridder; Blacksmithing List Sponsored by ABANA
> > > >Subject: Re: [TheForge] winter storm and equipment
> > > >
> > > >If you haven't done so already cover the equipment with a blanket and
> a
> > > tarp that is tied down.  If you have a block heater plug it in . If
> not a
> > > >100 watt light in a can attached to the oil pan or block will keep it
> > > from freezing.  Keeping the equipment covered will help the retention
> of
> > > heat.
> > > > Best of luck.
> > > >Dan in Auburn WA
> > > >
> > > >
> > > >On Sun, Jan 5, 2014 at 5:12 AM, terry l. ridder <
> terrylr at blauedonau.com
> > > >wrote:
> > > >
> > > >> hello;
> > > >>
> > > >> a simple question.
> > > >>
> > > >> in this winter storm, of the likes we have not seen in decades,
> > > >> equipment particularly tractors, generators, hyrdraulics, etc.
> should
> > > >> that equipment be started and set to idle for the duration of the
> > > >> storm to ensure that none of the oil becomes like tar and that none
> of
> > > >> the coolant systems freeze. basically, 24x7 until the storm is over.
> > > >>
> > > >> the equipment is all winterized but i have serious doubts about
> being
> > > >> good to an actual -45 degrees F.
> > > >>
> > > >> --
> > > >> terry l. ridder ><>
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