Difference between revisions of "Cooling things"

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m (Drinking tea)
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===Cold and hot drinks===
 
===Cold and hot drinks===
 
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Tea is a common drink in warm countries.
 
Tea is a common drink in warm countries.
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So does it help cool you down?
 
So does it help cool you down?
  
In the immediate sense, no. But also, somewhat of yes.
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In the immediate sense, no.  
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But also, somewhat of yes.
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There are two conflicting effects here.
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The first is basic physics - mixing two volumes balances their temperatures.
  
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Drinking drinking something cool will cool you down, drinking something warm will warm you up.
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How much depends on the volume, and because of limited stomach content, combined with limited temperature difference (you typically don't drink things below 0C or above 60C, the effect is typically fairly small.
  
  
Your body needs to stick around its average within a degree or three, or it will be in trouble[https://en.wikipedia.org/wiki/Human_body_temperature].
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The other is your body's thermoregulation.
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Your body needs to stick around its average temperature within a degree or three, or it will be in serious trouble[https://en.wikipedia.org/wiki/Human_body_temperature].
  
Adding a hot drink is heat you need to lose,  
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So if you're at perfect temperature,
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then adding a hot drink is heat you need to lose,  
 
adding a cool drink is something your body needs to heat.
 
adding a cool drink is something your body needs to heat.
  

Revision as of 18:31, 21 July 2021

Physical mechanics of cooling

Passive cooling

Passive cooling tends to mean 'no moving parts'


Evaporative cooling

Refrigeration cycle

Heat pumps

Free cooling

Dessicant based systems

Peltier effect and related effects

Theory

Peltier device behaviour and uses

On efficiency

Using the effects - practice and products

When passive cooling works

Windows and windcatchers

Convection in houses

Device cooling

Passive device cooling

Heatsinks

Heat pipes and vapor chambers

Personal cooling

Fans

Why wind helps even when you're not sweating

Spray bottle

Misting systems

Some small tricks

Wrapped towel

Ice

Swamp coolers

Mini dehumidifier

Those small personal ACs

Air conditioning

single hose portable air conditioners

two-hose portable air conditioners

Car AC

"Eco coolers"

Passive effects

Windows

Unsorted

Cold and hot drinks