Zero Emission Fridge for Rural Africa (ZEFRA) - Guidance

Low cost post-harvest technologies for rural communities

A native farmer named Gilberto Tethere in Cabo Delgado Province invented the Zero Emission Fridge for Rural Africa (ZEFRA) by reconstructing a metal silo using only locally available low-cost materials and applying traditional construction techniques.
The basic design of the ZEFRA is a weaved bamboo structure, meticulously covered with clay on both sides. The shape is cylindrical and the two openings (for filling and emptying) are closed with tightly fitting clay-covered hatches. It stands on a base that incorporates vermin traps to protect the grain from rats and mice, and under a simple shelter to maintain cool, dry and even conditions.
The clay carcass of the silo seals the seeds in an almost hermetic chamber and improves the effect of the organic, herbal repellents (produced from ashes, eucalyptus tree and other local plants, and used to inhibit insects such as the granary weevil (Sitophilus granaries L)).

Category:

Nonprofits & Activism

Tags:

• ZEFRA
• dm2009
• Development
• Marketplace
• Helvetas
• Africa

[oc00011]

@Permacrusher ok thanks

[Permacrusher]

@oc00011 It's a terracotta pot inside a larger pot, with sand in between the pots. Store things in the middle pot and cover, and keep the sand layer moist. As water evaporates, energy is drawn out from the middle, cooling it. Direct exposure to sunlight actually makes the interior cooler by increasing evaporation. Wind also helps evaporation, but it must be kept moist to work. I'm sure there are videos on youtube about it.

[oc00011]

@Permacrusher zeer? what's that?

[Permacrusher]

zeer is more impressive.

[stanleyn7]

@caradrrup Sorry! I wanted to vote up but clicked vote down by mistake.

[caradrrup]

i prefer pot in pot cooler

[Ch3ckm4t3]

In where I live, it is called a pot.

[jerryaltman]

A pot under a small awning... Where is the cooling effect ??????????