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#221
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Heating, cooling, and popular delusions and manias
On Tue, 25 Jul 2006 12:35:07 -0400, orange flamingo
wrote: Mxsmanic wrote: There are reasons why mechanical refrigeration was invented, and much of modern society cannot do without it. Pretending that it's an unnecessary luxury is ignoring reality. I don't know why people persist in these delusions. They don't seem to have them when discussing heating systems; few people dispute the necessity of heating in cold climates (even though heating in a cold climate is actually much less necessary than cooling in a hot climate). For some reason it seems most humans don't seem to mind the heat, but are scared to death of even a little cold. I've lived most of my life in the American South. I hate the heat, and anything over 80F is hot to me. I love the cold, but not below freezing (32F). However, I seem to be in the minority. Most people it seems are perfectly happy when it's in the 90s even with high humidity, which is weather that makes me feel miserable. Those same people start shivering and putting on sweaters if the temperature drops a degree below 70F. I cannot relate to that at all. It has to go below 50F before I even start to think about putting on long sleeves. You do get used to it after a while. It helps if you stop thinking about it, and also stop whining - seriously! The whining makes you feel worse! -- --- DFM - http://www.deepfriedmars.com --- -- |
#222
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Heating, cooling, and popular delusions and manias
On 25 Jul 2006 09:42:44 -0700, "Gregory Morrow"
wrote: orange flamingo wrote: Mxsmanic wrote: There are reasons why mechanical refrigeration was invented, and much of modern society cannot do without it. Pretending that it's an unnecessary luxury is ignoring reality. I don't know why people persist in these delusions. They don't seem to have them when discussing heating systems; few people dispute the necessity of heating in cold climates (even though heating in a cold climate is actually much less necessary than cooling in a hot climate). For some reason it seems most humans don't seem to mind the heat, but are scared to death of even a little cold. I've lived most of my life in the American South. I hate the heat, and anything over 80F is hot to me. I love the cold, but not below freezing (32F). However, I seem to be in the minority. Most people it seems are perfectly happy when it's in the 90s even with high humidity, which is weather that makes me feel miserable. Those same people start shivering and putting on sweaters if the temperature drops a degree below 70F. "Those same people" = " women" Less body hair maybe? -- --- DFM - http://www.deepfriedmars.com --- -- |
#223
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Draconian vacation policies for US slave workers
"Al Smith" wrote ... Air conditioning is a crutch. Maybe they need it in Phoenix. It might be argued that people shouldn't even be living in places where air conditioning is essential. Speaking of "crutches", heating is an equal or larger one. Why should anyone bother to live where it's cold, other than to spend the warm and pleasant months there? As for the Mixed Maniac's 33C with 31% humidity, that's positively salubrious, cool enough to play tennis or 18 holes in the afternoon, so dry that the sweat disappears before you feel it dripping from your brow. TMO |
#224
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Draconian vacation policies for US slave workers
Air conditioning is a crutch. Maybe they need it in Phoenix. It might be
argued that people shouldn't even be living in places where air conditioning is essential. Speaking of "crutches", heating is an equal or larger one. Why should anyone bother to live where it's cold, other than to spend the warm and pleasant months there? True enough. As a Canadian, I'm looking forward to global warming. I expect in a few years to be out in shirt sleeves in January. Global warming is going to be big for Canada. Invest in Canucks. Remember, you heard it here first. |
#225
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Draconian vacation policies for US slave workers
"Al Smith" wrote in message newszuxg.174543$771.89930@edtnps89... Air conditioning is a crutch. Maybe they need it in Phoenix. It might be argued that people shouldn't even be living in places where air conditioning is essential. Speaking of "crutches", heating is an equal or larger one. Why should anyone bother to live where it's cold, other than to spend the warm and pleasant months there? True enough. As a Canadian, I'm looking forward to global warming. I expect in a few years to be out in shirt sleeves in January. Global warming is going to be big for Canada. Invest in Canucks. Remember, you heard it here first. No, the truth of the matter is that when the glaciers and permafrost melt, the water will trickle South, converting the barely populated nether regions of Canada in to pestilent, malarial swamps. After all, that's how the Great Lakes were formed. As for warming, you do remember that folks lived in Western Greenland in 1100AD, raised grain and cattle, and it was considerably warmer than now. |
#226
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Draconian vacation policies for US slave workers
Miguel Cruz writes:
The reason for this is pretty simple: People know that heating is more necessary than cooling for comfortable and productive living, within the range of temperatures that are normally experienced in inhabited areas. Which inhabited areas? Most of the world's population these days lives in warm or hot climates. -- Transpose mxsmanic and gmail to reach me by e-mail. |
#227
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Draconian vacation policies for US slave workers
Keith W writes:
That depends on where you are comparing it with. When it comes to human physiology, comparisons and relative temperatures are not terribly meaningful. It's the absolute conditions that count, because the requirements of human physiology are fixed, not relative to external conditions. Thus, 35° C is hot, even if there are places where it is 50° C. People in a temperature of 35° C will suffer equally no matter what the temperatures are elsewhere on the planet. The level of danger is the same as well. I have worked in fabrication yards in all 3 cities and havent much sympathy with your whining. Your sympathy is irrelevant. -- Transpose mxsmanic and gmail to reach me by e-mail. |
#228
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Draconian vacation policies for US slave workers
nobody writes:
Wrong. With totally stale air, your perspiration evaporates, providing some cooling, but because the air is not moving, the relative humidity levels directly near yor skin rises and this slows down sweat evaporation and renders the process less effective. The effect is small in a gravitational field, thanks to convection. It is indeed a problem in zero gravity, and this has been recognized for some time. With a fan and ambiant temperature below 37°, you get cooling from the cooler air passing by, as well as more efficient sweat evaporation sicne you are constantly brought air that is not fully saturated with water (aka: rtelative humidity 100%). In high humidity or with low wind speeds, this is not sufficient to keep you cool. As the temperature and humidity rise, the wind speed necessary to completely carry off all body heat rises to impractical levels. Worse yet, since most of the cooling is evaporative, you lose water at a truly alarming rate in a hot wind, even though you may feel less sweaty. The water has to be constantly replaced, and the mere act of sweating is very tiring to the organism over time. With ambiant temperature above 37°, the fan will not push cooler air, but will stuff push air that will help perspiration evaporate and keep you cool. Not cool enough. You need cooling from evaporation sufficient to compensate for the air temperature above core temperature, and then even more in order to remove excess heat. That is very difficult to achieve. And note that when it is very humid, temperatures do not often rise above body temperature. They rise regularly far above body temperature, and even slight humidity is intolerable at high temperatures. The really hot temperatures generally happen in dry climates where your perspiration works fine. Not so. In Phoenix it can be 46° and humid; your perspiration does not work fine. When it is 45° in Bagdhad, there is still more people dying from american military presence than from heat. I'm sure the Israelis are working to beat this record. When it is 37° in Paris, there are more people dying from the heat than from any American military presence. -- Transpose mxsmanic and gmail to reach me by e-mail. |
#229
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Draconian vacation policies for US slave workers
Al Smith writes:
Air conditioning is a crutch. Maybe they need it in Phoenix. Phoenix would still be a town of 100,000 today if it weren't for air conditioning. It might be argued that people shouldn't even be living in places where air conditioning is essential. The same can be said for living in places where huge amounts of energy must be expended on heating during the winter. -- Transpose mxsmanic and gmail to reach me by e-mail. |
#230
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Draconian vacation policies for US slave workers
TOliver writes:
As for the Mixed Maniac's 33C with 31% humidity, that's positively salubrious, cool enough to play tennis or 18 holes in the afternoon, so dry that the sweat disappears before you feel it dripping from your brow. And you develop hyperthermia and pass out without any warning. -- Transpose mxsmanic and gmail to reach me by e-mail. |
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