So, how hot is boiling??

Gargamel · 07-26-12, 05:29 PM

Quote:

Originally Posted by Buddahaid

What's BRB? Boiling point depends on what's boiling and under what pressure. You sir will boil in orbit around Earth.

Work In progress, be right back.

If I keep an editor open, unless it's an edit, it tends to crash fairly quickly. So I have to post then edit.

kraznyi_oktjabr · 07-26-12, 05:52 PM

You work space temp is around 100 degrees celsius?

Sounds like same as Finnish sauna.

Edit: Oops... you mean AFTER you consider humidity?

Edit2: Checked with online calculator and got same numbers as in pics. http://www.hpc.ncep.noaa.gov/html/heatindex.shtml
Edit3: With current relative humidity of 94% + poorly heated sauna of 80 degrees celsius would mean heat index of 659 degrees celsius (1217 fahrenheit)

August · 07-26-12, 06:15 PM

AFAIK heat index doesn't calculate wind speed. If you have fans or blowers going it'll throw off those numbers by quite a bit i'll bet.

Platapus · 07-26-12, 06:25 PM

The problem with heat index is that several assumptions are made in its calculation. The result is supposed to be an equivalent temperature to "how it feels".

How temperature feels differs widely from person to person. To me, 50-60 degrees is wonderful and 70 degrees is a hot room. Other people are shivering at 70 degrees.

So when the heat index states 110, it means that that will feel like 110 degrees to someone, perhaps not you.

Another problem is that perception of temperatures is not linear. As the temperature increases past say 110, it becomes simply frickin hot. Few people can really tell the difference between 110 and 120, it is just frickin hot.

Like August posted, heat index only factors in temperature and relative humidity. Pretty much everything else happening weather-wise will affect the heat index rating. The tricky part is that Relative humidity, itself, is dependent not only on air pressure but on temperature.

So heat index is based on temperature and relative humidity which is in partly dependent on temperature. Hmmm

Stick with dry bulb temperatures.

As my father tells me "It never used to get so hot until they invented heat index."

07-26-12, 05:52 PM	#2
kraznyi_oktjabr Sea Lord Join Date: Mar 2010 Location: Republiken Finland Posts: 1,803 Downloads: 8 Uploads: 0	You work space temp is around 100 degrees celsius? Sounds like same as Finnish sauna. Edit: Oops... you mean AFTER you consider humidity? Edit2: Checked with online calculator and got same numbers as in pics. http://www.hpc.ncep.noaa.gov/html/heatindex.shtml Edit3: With current relative humidity of 94% + poorly heated sauna of 80 degrees celsius would mean heat index of 659 degrees celsius (1217 fahrenheit) __________________ You talk to God, you're religious. God talks to you, you're psychotic. - Dr. House Last edited by kraznyi_oktjabr; 07-26-12 at 06:03 PM.

07-26-12, 06:15 PM	#3
August Wayfaring Stranger Join Date: Apr 2005 Location: Massachusetts Posts: 23,226 Downloads: 0 Uploads: 0	AFAIK heat index doesn't calculate wind speed. If you have fans or blowers going it'll throw off those numbers by quite a bit i'll bet. __________________ Flanked by life and the funeral pyre. Putting on a show for you to see.

07-26-12, 06:25 PM	#4
Platapus Fleet Admiral Join Date: Oct 2006 Posts: 19,395 Downloads: 63 Uploads: 0	The problem with heat index is that several assumptions are made in its calculation. The result is supposed to be an equivalent temperature to "how it feels". How temperature feels differs widely from person to person. To me, 50-60 degrees is wonderful and 70 degrees is a hot room. Other people are shivering at 70 degrees. So when the heat index states 110, it means that that will feel like 110 degrees to someone, perhaps not you. Another problem is that perception of temperatures is not linear. As the temperature increases past say 110, it becomes simply frickin hot. Few people can really tell the difference between 110 and 120, it is just frickin hot. Like August posted, heat index only factors in temperature and relative humidity. Pretty much everything else happening weather-wise will affect the heat index rating. The tricky part is that Relative humidity, itself, is dependent not only on air pressure but on temperature. So heat index is based on temperature and relative humidity which is in partly dependent on temperature. Hmmm Stick with dry bulb temperatures. As my father tells me "It never used to get so hot until they invented heat index." __________________ abusus non tollit usum - A right should NOT be withheld from people on the basis that some tend to abuse that right.

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