So, how hot is boiling??

Gargamel · 07-26-12, 05:16 PM

I seriously can't wrap my head around these numbers. These are actual values from my work. It's hot yes, but I just can't wrap my mind around some of these heat index. We get these numbers from standing about 15 feet from a 1000'f (530'c) walk in oven without doors. That is our normal workspace. We get frequent water breaks, but don't have or want heat gear, too heavy.

Here's some pics.

These two are taken from a few weeks ago.

And here was today's.

I just dont understand this. What does boiling feel like? I stood in this all day and still got my skin. Now I understand when they say it's 92 but it feels like 98. That makes sense. But these numbers are just absurd. Are we that far off the chart??

If anybody cares to check these numbers, it's for Chardon, Ohio. Our work area never drops below 100'.

Buddahaid · 07-26-12, 05:24 PM

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

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."

TLAM Strike · 07-26-12, 06:28 PM

Yea it was over 125 near the pizza oven at work the other day.

Quote:

Originally Posted by Buddahaid

You sir will boil in orbit around Earth.

No you would not, the water on your skin might boil off (then freeze solid) but the whole blood boiling out your ears thing is a myth.

http://www.geoffreylandis.com/vacuum.html

vienna · 07-26-12, 06:35 PM

Quote:

No you would not, the water on your skin might boil off (then freeze solid) but the whole blood boiling out your ears thing is a myth.

You obviously have never had bad mescal before...

...

Buddahaid · 07-26-12, 07:03 PM

I wasn't thinking of an explosive decompression but your fluids boiling off. However, I do stand corrected as to the overall reaction. Interesting that your own blood pressure is enough to prevent boiling.

I was remembering the first chapter of 'Satellites, Rockets and Outer Space' by Willy Ley which describes a pot of water at 100^F boiling at about 12mi in altitude and being the point where body fluids would start boiling.

Gargamel · 07-26-12, 07:48 PM

No active blowers, per se, just a few scrubbers (negative suction) at points around the room. No discernable draft really.

@platapus. Ah that makes more sense.

We had a new kid on the line today, when it 102 at 0630, he said "damn it's hot up here!". We all just laughed at him. One guy went a put a jacket on to make fun of him. That only lasted
About 20 minutes though.

Platapus · 07-26-12, 08:07 PM

It is quite common for me to be in a meeting, sitting there basting myself with my own juices because of the heat and have someone sitting next to me with a coat on shivering.

I guess my comfort range is about 20 degrees cooler than most other people. It is really inconvenient and uncomfortable though. In fact, it sucks.

mookiemookie · 07-26-12, 09:51 PM

Ah, you work in Houston I see.

07-26-12, 05:16 PM	#1
Gargamel Lucky Sailor Join Date: Oct 2010 Location: Rome Posts: 4,273 Downloads: 81 Uploads: 0	So, how hot is boiling?? I seriously can't wrap my head around these numbers. These are actual values from my work. It's hot yes, but I just can't wrap my mind around some of these heat index. We get these numbers from standing about 15 feet from a 1000'f (530'c) walk in oven without doors. That is our normal workspace. We get frequent water breaks, but don't have or want heat gear, too heavy. Here's some pics. These two are taken from a few weeks ago. And here was today's. I just dont understand this. What does boiling feel like? I stood in this all day and still got my skin. Now I understand when they say it's 92 but it feels like 98. That makes sense. But these numbers are just absurd. Are we that far off the chart?? If anybody cares to check these numbers, it's for Chardon, Ohio. Our work area never drops below 100'. __________________ Luck is a residue of Design. Last edited by Gargamel; 07-26-12 at 05:26 PM.

07-26-12, 05:24 PM	#2
Buddahaid Shark above Space Chicken Join Date: Jun 2008 Posts: 9,319 Downloads: 162 Uploads: 0	What's BRB? Boiling point depends on what's boiling and under what pressure. You sir will boil in orbit around Earth. __________________ "However vast the darkness, we must provide our own light." Stanley Kubrick "Tomorrow belongs to those who can hear it coming." David Bowie

07-26-12, 05:52 PM	#4
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	#5
August Wayfaring Stranger Join Date: Apr 2005 Location: Massachusetts Posts: 23,197 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	#6
Platapus Fleet Admiral Join Date: Oct 2006 Posts: 19,362 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.

07-26-12, 07:03 PM	#9
Buddahaid Shark above Space Chicken Join Date: Jun 2008 Posts: 9,319 Downloads: 162 Uploads: 0	I wasn't thinking of an explosive decompression but your fluids boiling off. However, I do stand corrected as to the overall reaction. Interesting that your own blood pressure is enough to prevent boiling. I was remembering the first chapter of 'Satellites, Rockets and Outer Space' by Willy Ley which describes a pot of water at 100^F boiling at about 12mi in altitude and being the point where body fluids would start boiling. __________________ "However vast the darkness, we must provide our own light." Stanley Kubrick "Tomorrow belongs to those who can hear it coming." David Bowie

07-26-12, 07:48 PM	#10
Gargamel Lucky Sailor Join Date: Oct 2010 Location: Rome Posts: 4,273 Downloads: 81 Uploads: 0	No active blowers, per se, just a few scrubbers (negative suction) at points around the room. No discernable draft really. @platapus. Ah that makes more sense. We had a new kid on the line today, when it 102 at 0630, he said "damn it's hot up here!". We all just laughed at him. One guy went a put a jacket on to make fun of him. That only lasted About 20 minutes though. __________________ Luck is a residue of Design. Last edited by Gargamel; 07-26-12 at 07:59 PM.

07-26-12, 08:07 PM	#11
Platapus Fleet Admiral Join Date: Oct 2006 Posts: 19,362 Downloads: 63 Uploads: 0	It is quite common for me to be in a meeting, sitting there basting myself with my own juices because of the heat and have someone sitting next to me with a coat on shivering. I guess my comfort range is about 20 degrees cooler than most other people. It is really inconvenient and uncomfortable though. In fact, it sucks. __________________ abusus non tollit usum - A right should NOT be withheld from people on the basis that some tend to abuse that right.

07-26-12, 09:51 PM	#12
mookiemookie Navy Seal Join Date: Nov 2005 Location: Houston, TX Posts: 9,404 Downloads: 105 Uploads: 1	Ah, you work in Houston I see. __________________ They don’t think it be like it is, but it do. Want more U-boat Kaleun portraits for your SH3 Commander Profiles? Download the SH3 Commander Portrait Pack here.