4 ms·

I believe these kind of passive systems only really work when the air is hot and dry (like in a desert). In hot and humid areas like South East Asia this system

I believe these kind of passive systems only really work when the air is hot and dry (like in a desert). In hot and humid areas like South East Asia this system just doesn't work, sweating (evaporative cooling) isn't as effective when the air is already saturated with moisture.

zetalyrae 5y ago
You're correct. Which prompts the question: are there any passive cooling methods that work in high humidity? Maybe just sheltering underground.
londons_explore 5y ago
They alternatively can use the fact high up air is typically cooler (and dryer) than that at ground level.
- deleted 5y ago
  [deleted]
ike77 5y ago
You're right of the goal is to lower the temperature of the structure lower than the ambient temperature. If the goal is simply to lower the temperature of the building to that of the wind, simple radiators such as those is perfectly fine. Knowing that cities temperature is often a few degrees higher than that of the surrounding air, that would work in contemporary settings as well. But trees could play the same role more efficiently and with additional health and environmental benefits.
yreg 5y ago
Not sure if it's possible to summon dang like this, but there is a dead sibling comment caught in the spam filter.
jfoutz 5y ago
I think you're underselling it a bit. Our ancestral heritage gives us sweating. If that doesn't work, we sort of fall back to fight or flight, with a racing heart rate. move the blood around as much as you can, and hope some part of the body can cool it. Heat stroke is a real thing, and it's not fun. There seems to be automatic systems you can't think your way out of that make things worse. Fast heartbeat is burning more calories, adding heat, and friction from viscous blood adding more heat. I imagine it's a pretty unpleasant feeling. I tend to go into shock, so I get to dodge most of that horrible sensation.
- hattmall 5y ago
  How often are you going into shock from heat?!?
  - fsloth 5y ago
    Heatwaves cause deaths and increased hospitalization at least in Europe. I presume it's not any better elsewhere.
  - jfoutz 5y ago
    Rarely. Marathon training in summer, and being lazy about starting long runs early in the morning. I'm pretty confident that I can say the incidence is not zero, but I'd agree it's less than 4. this is over years. starting a multi hour run at 10 instead of 7 has some side effects. I'm not fast. I cover the distance. I've gotten into really weird headspace. I'm pretty good about tracking calories, so I'm pretty sure it was the heat from running when it's hot.

zetalyrae 5y ago

You're correct. Which prompts the question: are there any passive cooling methods that work in high humidity? Maybe just sheltering underground.

londons_explore 5y ago

They alternatively can use the fact high up air is typically cooler (and dryer) than that at ground level.

deleted 5y ago
[deleted]

ike77 5y ago

You're right of the goal is to lower the temperature of the structure lower than the ambient temperature. If the goal is simply to lower the temperature of the building to that of the wind, simple radiators such as those is perfectly fine. Knowing that cities temperature is often a few degrees higher than that of the surrounding air, that would work in contemporary settings as well. But trees could play the same role more efficiently and with additional health and environmental benefits.

yreg 5y ago

Not sure if it's possible to summon dang like this, but there is a dead sibling comment caught in the spam filter.

jfoutz 5y ago

I think you're underselling it a bit. Our ancestral heritage gives us sweating. If that doesn't work, we sort of fall back to fight or flight, with a racing heart rate. move the blood around as much as you can, and hope some part of the body can cool it. Heat stroke is a real thing, and it's not fun. There seems to be automatic systems you can't think your way out of that make things worse. Fast heartbeat is burning more calories, adding heat, and friction from viscous blood adding more heat. I imagine it's a pretty unpleasant feeling. I tend to go into shock, so I get to dodge most of that horrible sensation.

hattmall 5y ago
How often are you going into shock from heat?!?
- fsloth 5y ago
  Heatwaves cause deaths and increased hospitalization at least in Europe. I presume it's not any better elsewhere.
- jfoutz 5y ago
  Rarely. Marathon training in summer, and being lazy about starting long runs early in the morning. I'm pretty confident that I can say the incidence is not zero, but I'd agree it's less than 4. this is over years. starting a multi hour run at 10 instead of 7 has some side effects. I'm not fast. I cover the distance. I've gotten into really weird headspace. I'm pretty good about tracking calories, so I'm pretty sure it was the heat from running when it's hot.