Pic 48. When the refrigerator is assembled water is poured
on the sand.
16. The next process is for the pots to be burned. To
make this process more efficient it is better to
burn as many pots as possible at once. Firstly an
area is cleared and a circle is made with rocks.
The ground is then covered with cow dung.
17. The clay pots are then piled in the middle and
completely covered with sticks and more dung.
The fire is then lit and left to burn for 24 hours,
see picture 46.
18. Once the clay pots have been burnt the clay
refrigerator can be assembled. Firstly sand
should be placed in to the bottom of the large pot
forming a layer approximately 5 cm in depth. At
this point the small pot should be placed inside
the big pot on top of the sand. This should mean
that the tops of each pot are now level. Sand can
now be put around the outside of the big pot until
it is flush with the surface.
19. Ideally the clay refrigerator should be held in a
stand to allow airflow underneath to help with the
cooling process.
20. A damp cloth should be placed on top of the
inner storage pot to prevent hot air entering.
Pic 49. An assembled refrigerator using wood chippings
for insulation.
Pic 50. An assembled refrigerator using sand for insulation.
18
CLAY BASED
TECHNOLOGIES