Travel Towel Blacks
Passive cooler using layers of blackened foil and evaporative cooling.?
I'm trying to develop an inexpensive solar cooler for camping.
I've made a solar box COOKER before, using nested cardboard boxes painted black, with aluminum foil glued on the inside. The black surface absorbs heat from the sun's rays, while when the heat is re-emitted inside, the reflective foil tends to keep it in. It is a slow cooker which can develop about 325 degrees F.
Now I am thinking about trying the same idea inverted. I know I won't be able to freeze things. but if I start with something frozen, could I keep it frozen this way without having to use those pre-frozen plastic containers of blue chemical?
Anybody ever make a cooler like this? anybody know how? Any sites for plans? (not the cooker sites, I already have those.)
Please include ideas for evaporative cooling using wet towels, if that has worked for you in the past. I'm trying to do this no-electricity, no chemicals, no bottle of gas. I want to travel light.
Thanks!
Although I'm familiar with what you are trying to do (and it does work) I don't know any way to do it light weight.
The clear sky is really cold and heat will radiate off. But if the air is warm you need a window to prevent convection (air circulation) from defeating your purpose.
If it gets cloudy and warm (as it will in some areas) you have a problem.
There are naturally occurring "ice caves" where there is sufficient thermal mass that radiative cooling can keep water frozen year round.
I think just super good insulation is the biggest key. If you can open a box to the night sky when the air is cool and close it up during the day...
Evaporative cooling is my favorite. It does require that the air be reasonably dry - not good in humid climates. It can be effective with something a simple as a wet towel, but a filter pad that air can flow through while wet is the best.
After the Dragons Den ITSA multi functional beach bag towel
|
|
Mercer Cutlery Genesis 4-Piece Carving Knife Set $46.09 A supplier to the vast majority of cooking academies, Mercer Cutlery offers the Genesis Collection of kitchen knives to provide professional quality to the home chef. Comfortable, durable, and efficient, Genesis knives feature fully forged, single-piece blades made from high-carbon, no-stain German steel. Their taper-grind edges are polished by hand, and their substantial bolsters provide helpful ... |
|
|
Port Authority Waist Apron This apron has long waist ties to fit most sizes... |
|
|
CornerStone Waist Apron with Three Pockets Three pockets keep just what you need at hand.... |
|
|
Pampers Sensitive Wipes ... |
|
|
Scensibles Personal Disposal Bags for Sanitary Pads and Tampons $3.50 New consumer packaging. Single-use biodegradable plastic bags for a clean, easy, discreet way to dispose of sanitary pads, tampons and panty liners. Scensibles offer an attractive design and pleasant, fresh scent. The tie handle closure conceals contents and helps reduce the spread of germs and possible blood borne pathogens. Antimicrobial agents are built right into the bag, to inhibit the growth... |
|
|
Lu La Bath Brush Lite - W/ Replaceable Nylon Brush Head $13.95 Gently curved bath brush with an interchangeable head. Head is compatible with the Lu La Articulated Bath Brush. Made of high quality plastic that resists mold, very easy to clean and sanitize. To clean the brush itself, just scrub with soap and water, the high quality plastic will withstand years of use. The rubberized textured grip is soft and makes for an easy grip in the shower. With our 1 ye... |
|
|
The Absorber Synthetic Drying Chamois, 27 x 17 $8.86 Clean Tools 51149 27" X 17" Emgee The Absorber Chamois Clean Tools 51149 27" X 17" Emgee The Absorber Chamois Features: Chamois Machine washable Reusable storage container Unharmed by grease, oil, and detergents Tough material that resist shredding or tearing Lasts for years with normal use Size: 27" x 17" chamois... |
|
|
DAKINE Men's Travel Kit Based in Hood River, Oregon, DAKINE was founded in Maui, Hawai'i in 1979 by longtime surfer, Rob Kaplan. DAKINE'S first product, a revolutionary new surf leash, quickly gained worldwide popularity. This first leash led to more surfing related products, built to withstand the punishing conditions of the surf on the north shore of Hawai'i. In Hawaiian slang, "Da Kine" means the best and the company ... |