Cooler tip

[SPIKER]

I'm not sure that would actually stand up to a scientific test.

Alchemysa: while it is a simple statement it is how insulation works. With a simple air filled chamber the air on the warm side moves towards the cool side and takes the heat with it.

The foam (is as stated) billions of little air bubbles that do not move about. These air filled foam bubbles stop heat transfer better than air that is aloud to move about inside the chamber due to convection currents. All insulation does is slow the migration of heat from the warm side to the cool side. There is a link above to how stuff works that is more technical but says the same thing.

There are no insulation that is 100% eventually everything will be at the same temperature given enough time and no further energy infusion. So after all the suns have gone out all the nuclear fusion has stopped and all the left over nuclear materials (Uranium, Geranium and the like have converted thru Alpha, Beta and Gamma radiation their half lives of time into lead Pb-206.) At that point the only thing to create heat in the universe will be collisions between rocks floating about. Granted that is Billions if not trillions of years out... Dont think this conversation will be remember by the

Love the Chemistry classes lol.

Mark

 

[jinman]

I have a couple of mine that I sit on.

Isn't that the equivalent of throwing an American Tourister suitcase into the cage with a gorilla?:laughing::laughing::laughing:

I agree with Alchemysa, dead air space is a terrific insulator (dead air meaning not moving). Vacuum is even better and that's how a thermos works. The mirrored insides of a thermos even stop radiant heat. A vacuum doesn't even heat up from radiant heat or it would be hot in space instead of cold. There has to be a solid object with mass to be heated from radiant heat.

 

[SPIKER]

Isn't that the equivalent of throwing an American Tourister suitcase into the cage with a gorilla?:laughing::laughing::laughing:

I Loved those old Samsonite Commercials with the Gorilla

I agree with Alchemysa, dead air space is a terrific insulator (dead air meaning not moving) .... A vacuum doesn't even heat up from radiant heat or it would be hot in space instead of cold. There has to be a solid object with mass to be heated from radiant heat.

This is true however, temperature difference from one side to the other side sets up "Convection Currents in Gasses" that then move from warm side to cool side where heat energy is given to the colder side. Air is better at convention heating over say "Argon," as Noble Gasses are mostly inert and do not transfer energy well.

Then warm air displaces it in a cycle until both sides are the same temperature. Hence Insulation is used to slow the convection currents in air from moving the heat energy from warm to cool. The greater the difference in temperature the faster the convection currents move the heat at "faster rate." The better the insulation R value the slower the heat energy can move. As the two sides come closer to equal temperature the rate of heat transfer slows but eventually they reach equilibrium (assuming no energy is added to either side.) At that point the convention currents will slow/stop and the air space will not move (other than atoms bouncing about which remain moving down to absolute 0.)

Radiant Energy only comes into play when it intersects some "substance" at which point it is absorbed, deflected or reflected in varying amounts. If it is absorbed then the substance is warmer after being struck with radiant energy. If it is deflected then it is warmed some by the radiant energy and some radiant energy goes off in a different direction. If it is Reflected only (reflecting 100% of radiant energy is not possible) then the radiant energy continues off in some other direction (sake of discussion only.)


Mark

 

[Loadstar]

You insulate the wals to keep the air from moving. moving air does not insulate (why you have vents in your attic). Fiberglass only slows the air down. Foam traps it. Drilling holes in your sealed, air insulated top to add foam reduced the insulating value.

Your onto something here. You could build walk in freezer/cooler panels out of blow molded plastic like a cooler lid. Would be much cheaper than foam metal construction.

 

[SPIKER]

Your onto something here. You could build walk in freezer/cooler panels out of blow molded plastic like a cooler lid. Would be much cheaper than foam metal construction.

Been in one where they used 2" blue High Density foam boards and 4" wide aluminum tape with 2 big Modified AC compressors. The 2" was on outside corner block wall and the two interior walls were OSB on the outside corners in a basement. Deer season it was FULL of deer hanging and used for at least 2 years. The walls when not in use were un screwed and moved to the wall corners freeing up the space. I heard they were going to use Steel Siding for the inside next time it was going up. Guys I worked with had it, I no longer work there this was cira 2001/2002 years. Not sure how low of a temp was maintained in there probably not all that low but more than enough for the deer to not complain lol.

 

[Loadstar]

Been in one where they used 2" blue High Density foam boards and 4" wide aluminum tape with 2 big Modified AC compressors. The 2" was on outside corner block wall and the two interior walls were OSB on the outside corners in a basement. Deer season it was FULL of deer hanging and used for at least 2 years. The walls when not in use were un screwed and moved to the wall corners freeing up the space. I heard they were going to use Steel Siding for the inside next time it was going up. Guys I worked with had it, I no longer work there this was cira 2001/2002 years. Not sure how low of a temp was maintained in there probably not all that low but more than enough for the deer to not complain lol.

That will work. Coolers don't take much and you can get away with a lot.(except electric bill) Freezers are a bit trickier though.