Every thing heats up... yes..... everything.... heat is wonderful.... when anything gets into contact with a hot object it heats up. But this excess heat can be good, bad or even ugly.
Consider a engine. When it runs it heats up..... if it gets hotter and hotter and hotter then what will happen. Yess.... you guessed right my friend..... the engine will fail, it can bust !!!!! Thats why every engine needs a Cooling System.
IN THIS ARTICLE WE WILL TALK ABOUT OUR OWN LITTLE COOLING SYSTEM WHICH EACH AND EVERY HUMAN BEINGS CARRY WITH THEM!!!!!!
EVER ASKED WHY WE SWEAT IN THIS BLISTERING SUMMER DAYS !!!!
OK..... LETS HAVE AN ANSWER .... AND SEE WHAT A WONDERFUL MACHINE WE HUMAN BEINGS ARE.......
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| ARROW POINTED OBJECTS ARE CALLED COOLING FINS WHICH HELPS THE ENGINE TO COOL DOWN BY GIVING AWAY THE HEAT INTO THE AIR WHEN MOTOR CYCLE IS RUNNING. |
The motor cycle engine fins help the motor cycle to be cooled with the air when air flows over it.
The car engines cant be cooled with air.. so car engines uses water to cool the Engine.
Lets make it easy --
1. Motor cycle Engine is AIR COOLED.... To understand when we come from outside we just sit under the fan... the air from fan takes the heat from the body,,, this is called AIR COOLED COOLING SYSTEM.
2. The car engines are WATER COOLED... It uses water to cool off the engine... to understand think about taking a bath when we go under shower water flows over our body and takes heat from the body ........ this can be called WATER COOLING SYSTEM.
3. What about Human Engines..But when it comes to cooling itself our body do not use the above cooling method.. .. it uses a method called EVAPORATIVE COOLING....
Sorry for Engineering Terms........
Lets make it easy.....
Put Some water on your arm or hand....
Just take some water in one hand and rub it on the hand....
AFTER A FEW SECONDS WHAT HAPPENS...
YOU FEEL COOL IN YOUR HAND AND THE WATER HAS VANISHED..........
AM I RIGHT ?
OK NOW SEE HERE WHAT HAPPENS.....
The water will take heat from your body....As water heats up it turns into "WATER GAS" called vapor.... the water will vanish... but before vanishing it has taken heat from your body.......
"SO SIMPLE.... HMM!!!!! NOW THATS WHY I FELT COLD......"
Now Just like engines in cars our body is also a machine... it cannot work beyond a temparture... when temperature rises you know ...... its fever brother ( i enjoyed it in my school going days... hated it in cricket playing days :-))
Now body needs to maintain temperature of 37 degree Celsius..... so in summer when the sun is hot our body starts to heat up beyond its limit..... the body temperature starts to rise more and more..... now body must keep its temperature down... otherwise..... you know what i am going to say....
Now here comes Our Wonderful Cooling System.... ....
AMAZINGLY OUR BODY STARTS TO PRODUCE WATER IN OUR SKIN IN THE FORM OF SWEAT......
SWEAT IS WATER..... SO IT STARTS TAKING HEAT FROM THE BODY....
THIS WATER IN THE FORM OF SWEAT EVAPORATES OR TURNS IN "GAS WATER" AND MIXES INTO THE AIR........
OUR BODY HEAT IS TRANSFERED TO THE AIR.....
AND WE CHILL OUT ONCE AGAIN ALIVE AND WELL IN THIS WONDERFUL WORLD.
OH GOD!! ITS SO AMAZING ENGINEERING. AND WE KNEW NOTHING ABOUT THE WHOLE PROCESS.....
Here Are Some Interesting Facts........
[TO UNDERSTAND WATT....... THE FAN RUNNING OVER YOU HAS 80 WATTS OF POWER]
1. Even when inactive, an adult male must lose heat at a rate of about 90 watts
2. This 90 watt heat must be lost to keep us alive.
3. In summer time our body cannot give off heat to the atmosphere as atmosphere temp. is greater than our body temp.
4. Moreover we take in more heat from the atmosphere through our skin. So it is calculated that 109 watt more heat is gained....... in total we have (90+109=) 199 watts heat to give off to keep us alive.
5. Thats when our sweating starts.... sweating ensures that we give off 199 watts of heat from our body into the atmosphere......
[Source- http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/coobod.html#c1]
[Source- http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/coobod.html#c1]
I AM A MAN AMAZED AGAIN AND AGAIN BY ENGINEERING OF HUMAN BODY ITS AMAZING YOU SEE.... YET WE ARE SO CARELESS ABOUT IT!!!!!!!
I AM VERY GRATEFUL TO GOD FOR HE ALLOWED ME TO STUDY ENGINEERING.
"GLORY BE TO GOD..... THE BEST TO CREATE"
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