There's something in OUR world that affects YOU, me, and everything around us! That something is
called "heat". We know it surrounds us because we can feel it, but we can't usually see it,
unless it's in something that is so hot that it's glowing red or white like a stove heating element
or a light bulb. Well, what if we could see the heat around us? In this video you'll see "what
heat looks like" by seeing its signature through the eye of a "thermal imaging camera". Heat is
a form of energy. It appears in some chemical reactions or places where electrical, magnetic,
or physical friction occurs. Heat travels in three ways, that being through conduction, convection,
or radiation like from the sun that shines on you! Just like the bristles in this cool wet
tooth brush, there can also exist a "lack" of heat energy better known as "cold". So to reiterate,
something that is cold will have a low heat energy level, whereas something that is warm
will have a higher level of heat energy. Now this is important! Heat will always travel
towards something that is cold either by contact with a solid or fluid, by the air blowing on it,
or by radiating it towards the cold area! There is no such thing as cold energy, rather something
that is cold is considered to have a low level of heat energy. Notice the hot water tap here?
By running the hot water, you can see how the heat signature created appears as "swirls" as
the water cooled by the tub itself, mixes with the hot incoming water flow. Have you ever heard
the "hissing" that comes from the inside of your refrigerator? Here's the bubbling heat absorbing
refrigerant flowing through the "evapourator" of mine. And here's another device in my home
that has an evapourator. Inside this chest freezer behind the food compartment walls,
are the "evapourator coils" filled with heat absorbing refrigerant. Their job is to absorb
the heat that's in the food area. This absorbed heat, is then pumped out of the freezer by an
electric compressor to the "condenser coils" that are hidden behind the outer walls of this freezer.
The camera reveals how important it is to keep these two panels clear from obstructions. Putting
these sides against a wall would make the freezer compressor work harder, thereby shortening it's
life AND driving up electricity costs! And here you can see is the compressor hard at work. Here's
a time lapse I took of the warm-up of the engine of my car. Can you see the reflection of the heat
from my exhaust manifold on the firewall? This is one interesting thing I have learned. That "heat"
can be reflected by shiny metal surfaces, some painted metal surfaces, and more. This all has
to do with what is called the "emissivity". Many people have laptops, and they all need to get rid
of heat when they are running. Here's the warm air exhaust vent on mine. The interesting thing
with this sequence is how this camera shows where the hidden heat producing components are, like on
this cable modem. 43 Celsius = 109 Fahrenheit! That's pretty hot! And here I'm pouring a cup
of boiling hot water into a cold mug. Notice the reflection of the heat on the counter top?
And here's a 6 inch nail clamped in a vice. You can see the heat from the bending action
climb the faster we bend it. And here I have a time lapse of a "peltier cooler"
that's powered up. You can see how the heat moves through the fins as they are warmed
by the unit. The small aluminum block is getting cooled on the top as well.
Finally, here's a look at a small drill press in action. I'm drilling into a soft piece of
cedar post! There's not much pressure being applied, yet there are still some pretty hot
temperatures appearing at the drill bit. It's no wonder we see steam sometimes when we're drilling
into wet wood! I hope you have seen something that you have never seen before here! Thanks for watching.