|
Chilly Diesel Problems
"Jim" wrote in message hlink.net... "RCE" wrote in message ... "JLH" wrote in message ... Remind me not to argue water vapor properties with you. -- I prefer to call it a "discussion". Except, I am right. :-) Eisboch Hey guys. Lets get serious. I need help. I've been trying to wind chill a beer for several days now. So far I haven't been able to reduce the brew's temp. below ambient, no matter how many fans I have blowing on it. I even tried to spritz it with water. Nothing I've tried works. I thought you guys were on to something with this wind chill theory, but alas, it's just a bunch of hot air. Jim Mythbusters on cooling a 6 pack of beer: http://kwc.org/mythbusters/2005/03/m...a_sixpack.html |
Chilly Diesel Problems
"Jim" wrote in message
link.net... "RCE" wrote in message ... "Jim" wrote in message hlink.net... Hey guys. Lets get serious. I need help. I've been trying to wind chill a beer for several days now. So far I haven't been able to reduce the brew's temp. below ambient, no matter how many fans I have blowing on it. I even tried to spritz it with water. Nothing I've tried works. I thought you guys were on to something with this wind chill theory, but alas, it's just a bunch of hot air. Jim Buy yourself a vacuum chamber. I probably could arrange a modest discount. Eisboch Just what I need. An Electrolux on steroids. ;-) Jim Past girlfriend.... ....never mind. |
Chilly Diesel Problems
On Feb 8, 4:16 pm, "Jim" wrote:
Just what I need. An Electrolux on steroids. ;-) You mean a bagpipe? |
Chilly Diesel Problems
"Jim" wrote in message hlink.net... "RCE" wrote in message ... "JLH" wrote in message ... Remind me not to argue water vapor properties with you. -- I prefer to call it a "discussion". Except, I am right. :-) Eisboch Hey guys. Lets get serious. I need help. I've been trying to wind chill a beer for several days now. So far I haven't been able to reduce the brew's temp. below ambient, no matter how many fans I have blowing on it. I even tried to spritz it with water. Nothing I've tried works. I thought you guys were on to something with this wind chill theory, but alas, it's just a bunch of hot air. Jim Dip it in Freon Cleaning solvent (not available anymore to the public) and in 70 degree day the evaporation will cause frost. |
Chilly Diesel Problems
"RCE" wrote in message ... "Calif Bill" wrote in message link.net... Wind Chill. I do not think it refers to living tissue. I think the definition is how much heat transfer would occur in still air vs. Moving air. some low speed of air. -15 degrees with a wind chill of -30, says the same heat loss would occur if the temp was -30 and no wind movement. Nothing to do with evaporation but with the tendency of the air to heat up near the warmer object, slowing down heat transfer. The term "Wind Chill" applies *only* to living tissue. It refers to the rate of cooling (limited by the ambient temperature) that occurs to exposed living tissue. The increased rate of cooling can exceed the living tissue's ability to replace the heat lost and things like frostbite can quickly occur. The wind can't make it colder. It only makes the rate of heat transfer and cooling of the object faster. Heat transfer is higher in turbulent flow. Eisboch Did not realize it applied only to human tissue. Thought it was just a rate of heat transfer regards air movement. |
Chilly Diesel Problems
"JimH" wrote in message ... "Calif Bill" wrote in message link.net... "Eisboch" wrote in message . .. "JoeSpareBedroom" wrote in message ... What about when it hits the windshield, under those same conditions? Wind will cause an object to lose heat faster ... but will not cool it below the ambient temperature. The evaporation of a liquid is a state change whereby energy is used and heat is given off. Wind chill is a measurement of rapid cooling of living tissue. Eisboch Wind Chill. I do not think it refers to living tissue. It is something that *only* living tissue can experience. According to the definition, correct. But wind chill effect is also found on beer cans, etc. a breeze at 15 knots and 34 degrees will cool the beer a lot faster than just putting the beer in a 15 degree enviroment. |
Chilly Diesel Problems
"Calif Bill" wrote in message hlink.net... "JimH" wrote in message ... "Calif Bill" wrote in message link.net... "Eisboch" wrote in message . .. "JoeSpareBedroom" wrote in message ... What about when it hits the windshield, under those same conditions? Wind will cause an object to lose heat faster ... but will not cool it below the ambient temperature. The evaporation of a liquid is a state change whereby energy is used and heat is given off. Wind chill is a measurement of rapid cooling of living tissue. Eisboch Wind Chill. I do not think it refers to living tissue. It is something that *only* living tissue can experience. According to the definition, correct. But wind chill effect is also found on beer cans, etc. a breeze at 15 knots and 34 degrees will cool the beer a lot faster than just putting the beer in a 15 degree enviroment. Ummmmmmm........yeah...........sure. But I prefer the mythbusters method........http://kwc.org/mythbusters/2005/03/m...a_sixpack.html |
Chilly Diesel Problems
"Calif Bill" wrote in message hlink.net... "RCE" wrote in message ... "Calif Bill" wrote in message link.net... Wind Chill. I do not think it refers to living tissue. I think the definition is how much heat transfer would occur in still air vs. Moving air. some low speed of air. -15 degrees with a wind chill of -30, says the same heat loss would occur if the temp was -30 and no wind movement. Nothing to do with evaporation but with the tendency of the air to heat up near the warmer object, slowing down heat transfer. The term "Wind Chill" applies *only* to living tissue. It refers to the rate of cooling (limited by the ambient temperature) that occurs to exposed living tissue. The increased rate of cooling can exceed the living tissue's ability to replace the heat lost and things like frostbite can quickly occur. The wind can't make it colder. It only makes the rate of heat transfer and cooling of the object faster. Heat transfer is higher in turbulent flow. Eisboch Did not realize it applied only to human tissue. Thought it was just a rate of heat transfer regards air movement. Glad to see you finally got it. :-) |
Chilly Diesel Problems
"JimH" wrote in message ... "Calif Bill" wrote in message hlink.net... "RCE" wrote in message ... "Calif Bill" wrote in message link.net... Wind Chill. I do not think it refers to living tissue. I think the definition is how much heat transfer would occur in still air vs. Moving air. some low speed of air. -15 degrees with a wind chill of -30, says the same heat loss would occur if the temp was -30 and no wind movement. Nothing to do with evaporation but with the tendency of the air to heat up near the warmer object, slowing down heat transfer. The term "Wind Chill" applies *only* to living tissue. It refers to the rate of cooling (limited by the ambient temperature) that occurs to exposed living tissue. The increased rate of cooling can exceed the living tissue's ability to replace the heat lost and things like frostbite can quickly occur. The wind can't make it colder. It only makes the rate of heat transfer and cooling of the object faster. Heat transfer is higher in turbulent flow. Eisboch Did not realize it applied only to human tissue. Thought it was just a rate of heat transfer regards air movement. Glad to see you finally got it. :-) actually is the same whether it is tissue or beer cans. |
Chilly Diesel Problems
"Calif Bill" wrote in message link.net... "JimH" wrote in message ... "Calif Bill" wrote in message hlink.net... "RCE" wrote in message ... "Calif Bill" wrote in message link.net... Wind Chill. I do not think it refers to living tissue. I think the definition is how much heat transfer would occur in still air vs. Moving air. some low speed of air. -15 degrees with a wind chill of -30, says the same heat loss would occur if the temp was -30 and no wind movement. Nothing to do with evaporation but with the tendency of the air to heat up near the warmer object, slowing down heat transfer. The term "Wind Chill" applies *only* to living tissue. It refers to the rate of cooling (limited by the ambient temperature) that occurs to exposed living tissue. The increased rate of cooling can exceed the living tissue's ability to replace the heat lost and things like frostbite can quickly occur. The wind can't make it colder. It only makes the rate of heat transfer and cooling of the object faster. Heat transfer is higher in turbulent flow. Eisboch Did not realize it applied only to human tissue. Thought it was just a rate of heat transfer regards air movement. Glad to see you finally got it. :-) actually is the same whether it is tissue or beer cans. sigh |
Chilly Diesel Problems
"JimH" wrote in message ... "Calif Bill" wrote in message link.net... "JimH" wrote in message ... "Calif Bill" wrote in message hlink.net... "RCE" wrote in message ... "Calif Bill" wrote in message link.net... Wind Chill. I do not think it refers to living tissue. I think the definition is how much heat transfer would occur in still air vs. Moving air. some low speed of air. -15 degrees with a wind chill of -30, says the same heat loss would occur if the temp was -30 and no wind movement. Nothing to do with evaporation but with the tendency of the air to heat up near the warmer object, slowing down heat transfer. The term "Wind Chill" applies *only* to living tissue. It refers to the rate of cooling (limited by the ambient temperature) that occurs to exposed living tissue. The increased rate of cooling can exceed the living tissue's ability to replace the heat lost and things like frostbite can quickly occur. The wind can't make it colder. It only makes the rate of heat transfer and cooling of the object faster. Heat transfer is higher in turbulent flow. Eisboch Did not realize it applied only to human tissue. Thought it was just a rate of heat transfer regards air movement. Glad to see you finally got it. :-) actually is the same whether it is tissue or beer cans. sigh Sigh my ass. The reason there is a Wind Chill factor is the wind will carry away the extra BTU's that still air can not. The body's response is that it tries to get to the ambient temperature faster. At the same speed as if the air was xx degrees colder. The Wind Chill factor. Same reason that RCE stated that turbulent flow will transfer more heat. Laminar flow will have a small slow speed component of air right next to the surface. That small bit of air will insulate the surface from the air above. Works with beer cans also. Same reason that a car radiator works with air flowing over it. No fan and hot day and sitting still and you overheat. |
Chilly Diesel Problems
"Calif Bill" wrote in message hlink.net... "JimH" wrote in message ... actually is the same whether it is tissue or beer cans. sigh Sigh my ass. The reason there is a Wind Chill factor is the wind will carry away the extra BTU's that still air can not. The body's response is that it tries to get to the ambient temperature faster. At the same speed as if the air was xx degrees colder. The Wind Chill factor. Same reason that RCE stated that turbulent flow will transfer more heat. Laminar flow will have a small slow speed component of air right next to the surface. That small bit of air will insulate the surface from the air above. Works with beer cans also. Same reason that a car radiator works with air flowing over it. No fan and hot day and sitting still and you overheat. I agree with everything you posted, including tissue or beer cans, except the effect is not "wind chill". In moving air the tissue and beer can, if warmer or colder than the ambient temperature will cool or warm faster to the ambient temperature than in still air. Wind chill is the apparent lower temperature (than ambient) that living tissue experiences due to it's inability to keep up with the increased heat loss in windy conditions. It is equal to that temperature the tissue would be exposed to if there was no wind. And with that, I am done with this wind chill discussion. It's leaving me cold. Eisboch |
Chilly Diesel Problems
"RCE" wrote in message
... "JoeSpareBedroom" wrote in message ... Well anyway, it appears I've gone beyond my streak of good luck with windshield fluid. 35 years of driving in frigid climates, and never a problem until now, when I get not just one, but two products in a row made by idiots or liars. The stuff's frozen in the tank, at 14 degrees F. Well just think. Now, armed with your newly acquired knowledge, sue 'em! Eisboch Response from son's physics teacher: "Thermodynamics isn't my strong suit. I'm consulting someone smarter than I am on the subject, and will get back to you shortly". At least he's honest. But, this is why my son insisted on finding a tutor last year, when his curiosity went beyond what the teacher could explain. :-( and :-), both. |
Chilly Diesel Problems
On Feb 9, 12:43 am, "Calif Bill" wrote:
"JimH" wrote in message ... "Calif Bill" wrote in message hlink.net... "JimH" wrote in message . .. "Calif Bill" wrote in message arthlink.net... "RCE" wrote in message news:ErGdnTJw1LKv8VbYnZ2dnUVZ_uKknZ2d@giganews .com... "Calif Bill" wrote in message . earthlink.net... Wind Chill. I do not think it refers to living tissue. I think the definition is how much heat transfer would occur in still air vs. Moving air. some low speed of air. -15 degrees with a wind chill of -30, says the same heat loss would occur if the temp was -30 and no wind movement. Nothing to do with evaporation but with the tendency of the air to heat up near the warmer object, slowing down heat transfer. The term "Wind Chill" applies *only* to living tissue. It refers to the rate of cooling (limited by the ambient temperature) that occurs to exposed living tissue. The increased rate of cooling can exceed the living tissue's ability to replace the heat lost and things like frostbite can quickly occur. The wind can't make it colder. It only makes the rate of heat transfer and cooling of the object faster. Heat transfer is higher in turbulent flow. Eisboch Did not realize it applied only to human tissue. Thought it was just a rate of heat transfer regards air movement. Glad to see you finally got it. :-) actually is the same whether it is tissue or beer cans. sigh Sigh my ass. The reason there is a Wind Chill factor is the wind will carry away the extra BTU's that still air can not. The body's response is that it tries to get to the ambient temperature faster. At the same speed as if the air was xx degrees colder. The Wind Chill factor. Same reason that RCE stated that turbulent flow will transfer more heat. Laminar flow will have a small slow speed component of air right next to the surface. That small bit of air will insulate the surface from the air above. Works with beer cans also. Same reason that a car radiator works with air flowing over it. No fan and hot day and sitting still and you overheat. Agreed. But the beer or radiator fluid will not go below ambient temperature no matter how much air you blow on it. On the other hand, living tissue will and this is traditionally called the Wind Chill factor. |
Chilly Diesel Problems
"JimH" wrote in message oups.com... On Feb 9, 12:43 am, "Calif Bill" wrote: "JimH" wrote in message ... "Calif Bill" wrote in message hlink.net... "JimH" wrote in message . .. "Calif Bill" wrote in message arthlink.net... "RCE" wrote in message news:ErGdnTJw1LKv8VbYnZ2dnUVZ_uKknZ2d@giganews .com... "Calif Bill" wrote in message . earthlink.net... Wind Chill. I do not think it refers to living tissue. I think the definition is how much heat transfer would occur in still air vs. Moving air. some low speed of air. -15 degrees with a wind chill of -30, says the same heat loss would occur if the temp was -30 and no wind movement. Nothing to do with evaporation but with the tendency of the air to heat up near the warmer object, slowing down heat transfer. The term "Wind Chill" applies *only* to living tissue. It refers to the rate of cooling (limited by the ambient temperature) that occurs to exposed living tissue. The increased rate of cooling can exceed the living tissue's ability to replace the heat lost and things like frostbite can quickly occur. The wind can't make it colder. It only makes the rate of heat transfer and cooling of the object faster. Heat transfer is higher in turbulent flow. Eisboch Did not realize it applied only to human tissue. Thought it was just a rate of heat transfer regards air movement. Glad to see you finally got it. :-) actually is the same whether it is tissue or beer cans. sigh Sigh my ass. The reason there is a Wind Chill factor is the wind will carry away the extra BTU's that still air can not. The body's response is that it tries to get to the ambient temperature faster. At the same speed as if the air was xx degrees colder. The Wind Chill factor. Same reason that RCE stated that turbulent flow will transfer more heat. Laminar flow will have a small slow speed component of air right next to the surface. That small bit of air will insulate the surface from the air above. Works with beer cans also. Same reason that a car radiator works with air flowing over it. No fan and hot day and sitting still and you overheat. Agreed. But the beer or radiator fluid will not go below ambient temperature no matter how much air you blow on it. On the other hand, living tissue will and this is traditionally called the Wind Chill factor. The flesh will not go below ambient temperature. Wind chill is the apparent amount of heat that would be lost if the temperature was lower. If the temperature is 5f and a wind chill is -30f, the flesh will lose heat at the same rate as if there was no wind and the temperature was -30. But the flesh will not go below 5f. If it tried to go below 5f, then the Wind Chill Factor would be the Wind Heating factor. |
Chilly Diesel Problems
Calif Bill wrote:
"JimH" wrote in message oups.com... On Feb 9, 12:43 am, "Calif Bill" wrote: "JimH" wrote in message ... "Calif Bill" wrote in message link.net... "JimH" wrote in message ... "Calif Bill" wrote in message hlink.net... "RCE" wrote in message ... "Calif Bill" wrote in message link.net... Wind Chill. I do not think it refers to living tissue. I think the definition is how much heat transfer would occur in still air vs. Moving air. some low speed of air. -15 degrees with a wind chill of -30, says the same heat loss would occur if the temp was -30 and no wind movement. Nothing to do with evaporation but with the tendency of the air to heat up near the warmer object, slowing down heat transfer. The term "Wind Chill" applies *only* to living tissue. It refers to the rate of cooling (limited by the ambient temperature) that occurs to exposed living tissue. The increased rate of cooling can exceed the living tissue's ability to replace the heat lost and things like frostbite can quickly occur. The wind can't make it colder. It only makes the rate of heat transfer and cooling of the object faster. Heat transfer is higher in turbulent flow. Eisboch Did not realize it applied only to human tissue. Thought it was just a rate of heat transfer regards air movement. Glad to see you finally got it. :-) actually is the same whether it is tissue or beer cans. sigh Sigh my ass. The reason there is a Wind Chill factor is the wind will carry away the extra BTU's that still air can not. The body's response is that it tries to get to the ambient temperature faster. At the same speed as if the air was xx degrees colder. The Wind Chill factor. Same reason that RCE stated that turbulent flow will transfer more heat. Laminar flow will have a small slow speed component of air right next to the surface. That small bit of air will insulate the surface from the air above. Works with beer cans also. Same reason that a car radiator works with air flowing over it. No fan and hot day and sitting still and you overheat. Agreed. But the beer or radiator fluid will not go below ambient temperature no matter how much air you blow on it. On the other hand, living tissue will and this is traditionally called the Wind Chill factor. The flesh will not go below ambient temperature. Wind chill is the apparent amount of heat that would be lost if the temperature was lower. If the temperature is 5f and a wind chill is -30f, the flesh will lose heat at the same rate as if there was no wind and the temperature was -30. But the flesh will not go below 5f. If it tried to go below 5f, then the Wind Chill Factor would be the Wind Heating factor. Sigh, you do realize he will never understand it. |
Chilly Diesel Problems
"Calif Bill" wrote in message hlink.net... The flesh will not go below ambient temperature. Wind chill is the apparent amount of heat that would be lost if the temperature was lower. If the temperature is 5f and a wind chill is -30f, the flesh will lose heat at the same rate as if there was no wind and the temperature was -30. But the flesh will not go below 5f. If it tried to go below 5f, then the Wind Chill Factor would be the Wind Heating factor. I'll buy that. Eisboch |
Chilly Diesel Problems
"Eisboch" wrote in message . .. "Calif Bill" wrote in message hlink.net... The flesh will not go below ambient temperature. Wind chill is the apparent amount of heat that would be lost if the temperature was lower. If the temperature is 5f and a wind chill is -30f, the flesh will lose heat at the same rate as if there was no wind and the temperature was -30. But the flesh will not go below 5f. If it tried to go below 5f, then the Wind Chill Factor would be the Wind Heating factor. I'll buy that. Eisboch I did get an A in Thermodynamics! |
Chilly Diesel Problems
"Calif Bill" wrote in message link.net... "Eisboch" wrote in message . .. "Calif Bill" wrote in message hlink.net... The flesh will not go below ambient temperature. Wind chill is the apparent amount of heat that would be lost if the temperature was lower. If the temperature is 5f and a wind chill is -30f, the flesh will lose heat at the same rate as if there was no wind and the temperature was -30. But the flesh will not go below 5f. If it tried to go below 5f, then the Wind Chill Factor would be the Wind Heating factor. I'll buy that. Eisboch I did get an A in Thermodynamics! That's pretty good. In my humble opinion thermodynamics and fluid flow are among, if not the most, challenging engineering disciplines to master and apply. That's why I stuck with simple stuff like electronics. I struggled with Ohm's Law. Eisboch |
Chilly Diesel Problems
"Calif Bill" wrote in message link.net... "Eisboch" wrote in message . .. "Calif Bill" wrote in message hlink.net... The flesh will not go below ambient temperature. Wind chill is the apparent amount of heat that would be lost if the temperature was lower. If the temperature is 5f and a wind chill is -30f, the flesh will lose heat at the same rate as if there was no wind and the temperature was -30. But the flesh will not go below 5f. If it tried to go below 5f, then the Wind Chill Factor would be the Wind Heating factor. I'll buy that. Eisboch I did get an A in Thermodynamics! I obviously defer to your expertise Bill. Thanks for setting the record straight on this. ;-) |
Chilly Diesel Problems
RCE wrote:
"Calif Bill" wrote in message hlink.net... "JimH" wrote in message ... actually is the same whether it is tissue or beer cans. sigh Sigh my ass. The reason there is a Wind Chill factor is the wind will carry away the extra BTU's that still air can not. The body's response is that it tries to get to the ambient temperature faster. At the same speed as if the air was xx degrees colder. The Wind Chill factor. Same reason that RCE stated that turbulent flow will transfer more heat. Laminar flow will have a small slow speed component of air right next to the surface. That small bit of air will insulate the surface from the air above. Works with beer cans also. Same reason that a car radiator works with air flowing over it. No fan and hot day and sitting still and you overheat. I agree with everything you posted, including tissue or beer cans, except the effect is not "wind chill". In moving air the tissue and beer can, if warmer or colder than the ambient temperature will cool or warm faster to the ambient temperature than in still air. Wind chill is the apparent lower temperature (than ambient) that living tissue experiences due to it's inability to keep up with the increased heat loss in windy conditions. It is equal to that temperature the tissue would be exposed to if there was no wind. And with that, I am done with this wind chill discussion. It's leaving me cold. Well, I'm glad to see everybody having fun today. :) |
Chilly Diesel Problems
Short Wave Sportfishing wrote: And with that, I am done with this wind chill discussion. It's leaving me cold. Well, I'm glad to see everybody having fun today. :) it's a sunny 32 degrees here today. gives me hope for tomorrow. and the future forcasts look like the local global cooling might be gradually winding down. But it is still February.... |
Chilly Diesel Problems
Reginald P. Smithers III wrote:
Calif Bill wrote: "JimH" wrote in message oups.com... On Feb 9, 12:43 am, "Calif Bill" wrote: "JimH" wrote in message ... "Calif Bill" wrote in message link.net... "JimH" wrote in message ... "Calif Bill" wrote in message hlink.net... "RCE" wrote in message ... "Calif Bill" wrote in message link.net... Wind Chill. I do not think it refers to living tissue. I think the definition is how much heat transfer would occur in still air vs. Moving air. some low speed of air. -15 degrees with a wind chill of -30, says the same heat loss would occur if the temp was -30 and no wind movement. Nothing to do with evaporation but with the tendency of the air to heat up near the warmer object, slowing down heat transfer. The term "Wind Chill" applies *only* to living tissue. It refers to the rate of cooling (limited by the ambient temperature) that occurs to exposed living tissue. The increased rate of cooling can exceed the living tissue's ability to replace the heat lost and things like frostbite can quickly occur. The wind can't make it colder. It only makes the rate of heat transfer and cooling of the object faster. Heat transfer is higher in turbulent flow. Eisboch Did not realize it applied only to human tissue. Thought it was just a rate of heat transfer regards air movement. Glad to see you finally got it. :-) actually is the same whether it is tissue or beer cans. sigh Sigh my ass. The reason there is a Wind Chill factor is the wind will carry away the extra BTU's that still air can not. The body's response is that it tries to get to the ambient temperature faster. At the same speed as if the air was xx degrees colder. The Wind Chill factor. Same reason that RCE stated that turbulent flow will transfer more heat. Laminar flow will have a small slow speed component of air right next to the surface. That small bit of air will insulate the surface from the air above. Works with beer cans also. Same reason that a car radiator works with air flowing over it. No fan and hot day and sitting still and you overheat. Agreed. But the beer or radiator fluid will not go below ambient temperature no matter how much air you blow on it. On the other hand, living tissue will and this is traditionally called the Wind Chill factor. The flesh will not go below ambient temperature. Wind chill is the apparent amount of heat that would be lost if the temperature was lower. If the temperature is 5f and a wind chill is -30f, the flesh will lose heat at the same rate as if there was no wind and the temperature was -30. But the flesh will not go below 5f. If it tried to go below 5f, then the Wind Chill Factor would be the Wind Heating factor. Sigh, you do realize he will never understand it. No, Bill is right. I have attended at least five, possibly six, cold weather rescue/cold water rescue/ hypothermia clinics presented by Dr. Murray Hamlet who used to run the Combat Resources Center at the U.S. Army's Research Institute of Environmental Medicine (or whatever it is called now), Natick, MA. Dr. Hamlet is the world's leading expert on cold and cold weather operations and rescue. Dr. Hamlet says as part of his cold rescue presentations that "the one thing you can count on is that a stiff will be a stiff - the body cannot get any colder than ambient temperature". I'm quoting directly from my notes taken at the 1999 EMS Cold Weather/Water Rescue seminar presented at the USCG Academy, New London,CT. The seminar was for folks involved in paramedic level dive medicine and cold condition SAR - which happened to include me. :) |
Chilly Diesel Problems
Tim wrote:
Short Wave Sportfishing wrote: And with that, I am done with this wind chill discussion. It's leaving me cold. Well, I'm glad to see everybody having fun today. :) it's a sunny 32 degrees here today. gives me hope for tomorrow. and the future forcasts look like the local global cooling might be gradually winding down. But it is still February.... It's only 20 here and wind gusting 20/25. I don't know what the "semi-hemi-demi-quasi Real Feel it's still only as cold as the ambient" temperature is, but what ever it is - IT'S FREAKIN' COLD!!! |
Chilly Diesel Problems
Short Wave Sportfishing wrote:
Reginald P. Smithers III wrote: Calif Bill wrote: "JimH" wrote in message oups.com... On Feb 9, 12:43 am, "Calif Bill" wrote: "JimH" wrote in message ... "Calif Bill" wrote in message link.net... "JimH" wrote in message ... "Calif Bill" wrote in message hlink.net... "RCE" wrote in message ... "Calif Bill" wrote in message link.net... Wind Chill. I do not think it refers to living tissue. I think the definition is how much heat transfer would occur in still air vs. Moving air. some low speed of air. -15 degrees with a wind chill of -30, says the same heat loss would occur if the temp was -30 and no wind movement. Nothing to do with evaporation but with the tendency of the air to heat up near the warmer object, slowing down heat transfer. The term "Wind Chill" applies *only* to living tissue. It refers to the rate of cooling (limited by the ambient temperature) that occurs to exposed living tissue. The increased rate of cooling can exceed the living tissue's ability to replace the heat lost and things like frostbite can quickly occur. The wind can't make it colder. It only makes the rate of heat transfer and cooling of the object faster. Heat transfer is higher in turbulent flow. Eisboch Did not realize it applied only to human tissue. Thought it was just a rate of heat transfer regards air movement. Glad to see you finally got it. :-) actually is the same whether it is tissue or beer cans. sigh Sigh my ass. The reason there is a Wind Chill factor is the wind will carry away the extra BTU's that still air can not. The body's response is that it tries to get to the ambient temperature faster. At the same speed as if the air was xx degrees colder. The Wind Chill factor. Same reason that RCE stated that turbulent flow will transfer more heat. Laminar flow will have a small slow speed component of air right next to the surface. That small bit of air will insulate the surface from the air above. Works with beer cans also. Same reason that a car radiator works with air flowing over it. No fan and hot day and sitting still and you overheat. Agreed. But the beer or radiator fluid will not go below ambient temperature no matter how much air you blow on it. On the other hand, living tissue will and this is traditionally called the Wind Chill factor. The flesh will not go below ambient temperature. Wind chill is the apparent amount of heat that would be lost if the temperature was lower. If the temperature is 5f and a wind chill is -30f, the flesh will lose heat at the same rate as if there was no wind and the temperature was -30. But the flesh will not go below 5f. If it tried to go below 5f, then the Wind Chill Factor would be the Wind Heating factor. Sigh, you do realize he will never understand it. No, Bill is right. I have attended at least five, possibly six, cold weather rescue/cold water rescue/ hypothermia clinics presented by Dr. Murray Hamlet who used to run the Combat Resources Center at the U.S. Army's Research Institute of Environmental Medicine (or whatever it is called now), Natick, MA. Dr. Hamlet is the world's leading expert on cold and cold weather operations and rescue. Dr. Hamlet says as part of his cold rescue presentations that "the one thing you can count on is that a stiff will be a stiff - the body cannot get any colder than ambient temperature". I'm quoting directly from my notes taken at the 1999 EMS Cold Weather/Water Rescue seminar presented at the USCG Academy, New London,CT. The seminar was for folks involved in paramedic level dive medicine and cold condition SAR - which happened to include me. :) Tom, I realize Bill was correct, I was poking fun at JimH's line when he was saying Bill didn't understand Wind Chill. Bill obviously understood it much better than JimH. |
| All times are GMT +1. The time now is 12:56 PM. |
Powered by vBulletin® Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Copyright ©2004 - 2014 BoatBanter.com