Homemade Clay Refrigerator - BEING ECOFRIENDLY !

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Introduction: Homemade Clay Refrigerator - BEING ECOFRIENDLY !

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Hi, I am Sahas Chitlange , aging 14 , from India . Here's my new innovation on fridge from clay. Its very easy and cheap to build and very cheap. In india the cost is about  Rs. 300 only. The project's principle is based on evaporation. you can take this system for camping where you need a fridge to keep your cokes cool. The materials required for making this easy fridge are:
1) Clay pots
2) some sand
3) water

For the first time to get the cooling effect you need to wait for 10-12 hrs. The thing you need to remember is adding water after a day.

Step 1: Chose Correct Pots

You need to chose correct size pots so that they go into each other easily. Prefer new ones because old ones have their pores blocked. This affects cooling.

Step 2: Adding Sand

Add some sand in the base of the larger pot. You may close the pot holes. I did not.  You may also heat the sand strongly to kill the germs as in India you get the sand on roadsides!

Step 3: Insert the Smaller Pot

Now insert the smaller pot in the larger one. Take care you may get your hands jammed during this process. I got once, Very painfull...
Also see that you have some gap left on the sides , you need to add sand there later.

Step 4: Add Sand to the Sides

Carefully add sand on the sides of the pot. Avoid spilling it into the smaller pot , its very difficult to get that stuff out once spilled in ! Also add some water after you add sand.

Step 5: Cover It

You can make a cover out of old pots as i did or simply cover it with a damp cloth.

Step 6: Enjoy Cooling

Its the time to enjoy cooling.

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53 Comments

Good idea... can try it at home.... Thank you...

how long it will take to get the required low temperature???

That depends on the sizes of the jars, how cold the water was, when you dampened it, the ambient temperature, and the relative humidity. So, it would be difficult to give an accurate answer.

Cool instructable (if you'll pardon the pun...)

In Australia in the 19th century there was a thing called a Coolgardie safe:

(https://en.wikipedia.org/wiki/Coolgardie_safe)

which was a refrigerator which used water evaporation as its cooling mechanism much in the same way as you have here. A different design, but the same principal.

Good work.

So this stays outside? Should it be in the shade or out in the sun? If it is in sun then it will evaporate faster and cool better but will also need more evaporation to compensate for greater heat... I live in a smallish trailer and don't want to use propane to keep food cool and don't have it in the budget for a large solar panel.

I will try and rig up a drip irrigation emitter to drip over bowl part into sand and either use timer or get very low flow emitter and drill an overflow opening towards top.

very nice and more power to you for sharing your knowledge.

I live in Morocco, so it is good news for poor people and those with out electricity.

I will share your generous work.

cOOl.! ~( : - } )=>=== ] Favorited. The vote don't seem to work.