Difference between revisions of "Frigo du désert/en"

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{{ {{tntn|Tuto Details}}
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{{Tuto Details
|SourceLanguage=fr
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|Main_Picture=Photo ZEER POT.jpg
|Language=en
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|Licences=Attribution-ShareAlike (CC BY-SA)
|IsTranslation=1
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|Description=Make a refrigerator that works without electricity!
 +
|Area=Food
 
|Type=Tutorial
 
|Type=Tutorial
|Area=Food
 
|Tags=Frigo, Désert, zeerpot, NomadeDesMers
 
|Description=Make a refrigerator that works without electricity!
 
 
|Difficulty=Very easy
 
|Difficulty=Very easy
 +
|Duration=2
 +
|Duration-type=hour(s)
 
|Cost=10
 
|Cost=10
 
|Currency=EUR (€)
 
|Currency=EUR (€)
|Duration=2
+
|Tags=Frigo, Désert, zeerpot, NomadeDesMers, conservation, Alimentation
|Duration-type=hour(s)
 
|Licences=Attribution-ShareAlike (CC BY-SA)
 
|Main_Picture=Photo ZEER POT.jpg
 
 
|SourceLanguage=fr
 
|SourceLanguage=fr
 
|Language=en
 
|Language=en
 
|IsTranslation=1
 
|IsTranslation=1
 
}}
 
}}
{{ {{tntn|Introduction}}
+
{{Introduction
 
|Introduction=In countries where temperatures frequently rise above 20°C, food does not stay fresh for long. A tomato, for example, is damaged in only 2 days.  
 
|Introduction=In countries where temperatures frequently rise above 20°C, food does not stay fresh for long. A tomato, for example, is damaged in only 2 days.  
 
Also, given the price and energy consumption of a refrigerator, food preservation is a recurring problem in developing countries.
 
Also, given the price and energy consumption of a refrigerator, food preservation is a recurring problem in developing countries.
Thus, without means of conservation, even if a family affected by poverty produces enough food to feed itself, it has few means to fight hunger.  
+
Thus, without means of conservation, even if a family affected by poverty produces enough food to feed itself, it has few means to fight hunger.
  
 
A food preservation system can greatly improve the daily lives of many families. In particular, it opens up economic opportunities: to preserve food is also to be able to sell it.
 
A food preservation system can greatly improve the daily lives of many families. In particular, it opens up economic opportunities: to preserve food is also to be able to sell it.
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This inexpensive and easy to manufacture technology can be used to cool substances such as water, food or drugs sensitive to high temperatures. It helps to avoid flies or other insects. Moreover, most foods can be stored in a Zeer Pot for 15 to 20 days longer than left in the open air and vegetables keep their vitamins better. Indeed, under good conditions (explained later in this tutorial), the temperature inside the system can reach 10°C less than the outside temperature.
 
This inexpensive and easy to manufacture technology can be used to cool substances such as water, food or drugs sensitive to high temperatures. It helps to avoid flies or other insects. Moreover, most foods can be stored in a Zeer Pot for 15 to 20 days longer than left in the open air and vegetables keep their vitamins better. Indeed, under good conditions (explained later in this tutorial), the temperature inside the system can reach 10°C less than the outside temperature.
 
}}
 
}}
{{ {{tntn|TutoVideo}}
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{{TutoVideo
|TutoVideoService=youtube
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|VideoType=Youtube
|TutoVideoURL=https://www.youtube.com/watch?v=7saOOyc5opE
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|VideoURLYoutube=https://www.youtube.com/watch?v=7saOOyc5opE
 
}}
 
}}
{{ {{tntn|Materials}}
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{{Materials
 
|Material= *1 clay pot 50 x 46 cm  
 
|Material= *1 clay pot 50 x 46 cm  
  
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*About 45 kg of fine sand
 
*About 45 kg of fine sand
  
• Environ 15 litres d’eau potable*
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* About 15 litres of drinking water*
  
1 tissu respirant ou couvercle
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*1 breathable fabric or cover
  
Adaptabilité :
+
Adaptability :
  
Les dimensions des deux pots varient selon la quantité d’aliments que vous souhaitez pouvoir conserver. Ici nous proposons de construire un Zeer Pot pouvant contenir 12 kg d’aliments. Pour cela il faudra un pot externe de 50 cm de diamètre et un pot interne de 30 cm de diamètre.
+
The dimensions of the two jars vary according to the quantity of food you wish to be able to preserve. Here we propose to build a Zeer Pot that can contain 12 kg of food. This will require an outer pot 50 cm in diameter and an inner pot 30 cm in diameter.
La taille peut être adaptée en fonction des besoins à condition de respecter  les proportions.
+
The size can be adapted according to the needs provided that the proportions are respected.
  
Précautions sanitaires :
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Health precautions :
  
Attention : *utiliser une eau souillée risquerait de contaminer les aliments déposés dans le pot interne. Il en sera de même si le sable contient des éléments nocifs comme des hydrocarbures.
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Attention : *Using contaminated water could contaminate the food deposited in the inner pot. The same will apply if the sand contains harmful elements such as hydrocarbons.
|Tools=Aucun outil n'est nécessaire pour fabriquer un Zeer Pot
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|Tools=No tools are needed to make a Zeer Pot
 
}}
 
}}
{{ {{tntn|Separator}}}}
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{{Tuto Step
{{ {{tntn|Tuto Step}}
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|Step_Title=How it works
 +
|Step_Content=The Zeer Pot is:
 +
2 terracotta (or clay) pottery interwoven with a layer of moist sand of about 4 cm between the two.
 +
The inner jar contains food to keep cool.
 +
The sand allows the refrigeration of the system.
 +
The outer pot contains it all.
 +
 
 +
The water contained in the sand needs energy to be transformed into steam, this is the principle of evaporation.
 +
In this case, the heat contained in the internal pot will supply this energy and allow the water to evaporate. 
 +
This thermal reaction lowers the internal pot temperature and keeps the food cool.
 
|Step_Picture_00=Fonctionnement.jpg
 
|Step_Picture_00=Fonctionnement.jpg
|Step_Title=Fonctionnement
 
|Step_Content=Le Zeer Pot c’est :
 
2 poteries en terre cuite (ou en argile) imbriquées l’une dans l’autre avec une couche de sable humide d’environ 4 cm entre les deux.
 
Le pot interne contient les aliments à garder au frais.
 
Le sable permet la réfrigération du système.
 
Le pot externe contient le tout.
 
 
L’eau contenue dans le sable a besoin d’énergie pour se transformer en vapeur, c’est le principe d’évaporation.
 
Dans le cas présent c’est notamment la chaleur contenue dans le pot interne qui va fournir cette énergie et permettre à l’eau de s’évaporer. 
 
Cette réaction thermique permet ainsi de faire descendre la température du pot interne et de conserver les aliments au frais.
 
 
}}
 
}}
{{ {{tntn|Tuto Step}}
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{{Tuto Step
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|Step_Title=External pot
 +
|Step_Content=In the bottom of the outer pot place a layer of sand thick enough so that the top of the inner pot is at the same height as the top.
 +
the top of the outer pot. Then moisten.
 
|Step_Picture_00=Pot externe.jpg
 
|Step_Picture_00=Pot externe.jpg
|Step_Title=Pot externe
 
|Step_Content=Dans le fond du pot externe disposer une couche de sable suffisamment épaisse pour que le haut du pot interne soit à la même hauteur que
 
le haut du pot externe. Puis humidifier.
 
 
}}
 
}}
{{ {{tntn|Tuto Step}}
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{{Tuto Step
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|Step_Title=Internal pot
 +
|Step_Content=Place the inner pot inside the outer pot.
 +
 
 +
Attention: the pot must be well stabilized on the first layer of sand
 +
and placed in the center of the outer pot.
 
|Step_Picture_00=Pot interne.jpg
 
|Step_Picture_00=Pot interne.jpg
|Step_Title=Pot Interne
 
|Step_Content=Placer le pot interne à l’intérieur du pot externe.
 
 
Attention : le pot doit être bien stabilisé sur la première couche de sable
 
et disposé au centre du pot externe.
 
 
}}
 
}}
{{ {{tntn|Tuto Step}}
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{{Tuto Step
 +
|Step_Title=Sand
 +
|Step_Content=Fill the gap between the two pots with several successive layers of sand...
 
|Step_Picture_00=Sable2.jpg
 
|Step_Picture_00=Sable2.jpg
|Step_Title=Sable
 
|Step_Content=Combler le vide entre les deux pots par plusieurs couches de sable successives...
 
 
}}
 
}}
{{ {{tntn|Tuto Step}}
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{{Tuto Step
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|Step_Title=Water
 +
|Step_Content=... without forgetting to moisten the sand at each layer.
 
|Step_Picture_00=Eau2.jpg
 
|Step_Picture_00=Eau2.jpg
|Step_Title=Eau
 
|Step_Content=... sans oublier d'humecter le sable à chacune des couches.
 
 
}}
 
}}
{{ {{tntn|Tuto Step}}
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{{Tuto Step
|Step_Picture_00=Utilisation2.jpg
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|Step_Title=Use
|Step_Title=Utilisation
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|Step_Content=* Place the system in a dry area, out of direct sunlight and in a draught.
|Step_Content=• Placer le système dans une zone sèche, à l’abri du soleil et dans un courant d’air.
 
  
• Remplir le Zeer Pot avec les aliments.
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*Fill the Zeer Pot with the food.
  
• Humecter le tissu respirant et le placer à la surface du système
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*Moisten the breathable fabric and place it on the surface of the system
en guise de couvercle.
+
as a lid.
  
• Ré-humidifier le sable dès qu’il commence à sécher,  
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*Re-wet the sand as soon as it starts to dry, about twice a day.
soit deux fois par jour environ.
+
|Step_Picture_00=Utilisation2.jpg
 
}}
 
}}
{{ {{tntn|Tuto Step}}
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{{Tuto Step
|Step_Picture_00=Se servir au mieux du Zeer Pot.jpg
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|Step_Title=Making the most of the Zeer Pot
|Step_Title=Se servir au mieux du Zeer Pot
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|Step_Content=What to put in a Zeer Pot?
|Step_Content=Que mettre dans un Zeer Pot ?
 
  
• Tous les légumes frais qui sont sucéptibles de pourrir rapidement
+
<div class="mw-translate-fuzzy">
 +
*All fresh vegetables that are likely to rot quickly
 +
</div>
  
• De l’eau, afin qu’elle reste fraiche
+
*Water, so it stays fresh
  
• Des médicaments supportant mal la chaleur
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*Medicines that do not tolerate heat well
  
Attention : le sable doit rester bien humide et le système doit bénéficier d’un flux d’air continu, qui puisse passer tout autour du pot.  
+
Caution: the sand must remain well moist and the system must benefit from a continuous air flow, which can pass all around the pot.  
Il est vivement conseillé de surélever le pot (sur un trépier par exemple) afin que l’air puisse circuler au mieux.
+
It is strongly recommended to raise the pot (on a tripod for example) so that the air can circulate as well as possible.
  
Attention : Certains légumes dégagent un gaz (l’étylène) en murissant. Cependant d’autres aliments peuvent pourrir au contact de ce gaz.  
+
Caution: Some vegetables release a gas (etylene) when ripening. However, other foods can rot in contact with this gas.  
Il est donc conseillé d’éviter le mélange des cucurbitacés avec des pommes, tomates, poivrons...
+
It is therefore advisable to avoid mixing cucurbits with apples, tomatoes, peppers...
Pour plus de précisions à ce sujet, le document en lien contient un tableau récapitulatif de la conservation d’aliments du quotidien :
+
For more information on this subject, the linked document contains a summary table of daily food preservation:
 
http://horizonalimentaire.fr/sites/horizonalimentaire.fr/files/fichiers/guide_conservation_fetl_comite_conso_aprifel.pdf
 
http://horizonalimentaire.fr/sites/horizonalimentaire.fr/files/fichiers/guide_conservation_fetl_comite_conso_aprifel.pdf
 +
|Step_Picture_00=Se servir au mieux du Zeer Pot.jpg
 
}}
 
}}
{{ {{tntn|Notes}}
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{{Notes
|Notes=Visionner la vidéo tutorielle [https://www.youtube.com/watch?v=7saOOyc5opE ici]
+
|Notes=Watch the video tutorial [https://www.youtube.com/watch?v=7saOOyc5opE here]
  
Télécharger le tutoriel [http://lowtechlab.org/wp-content/uploads/2016/08/LE-LAB-Zeer-Pot.pdf ici]
+
<div class="mw-translate-fuzzy">
 +
Download the tutorial[http://lowtechlab.org/wp-content/uploads/2016/08/LE-LAB-Zeer-Pot.pdf here in french]
 +
</div>
  
N'hésitez pas à commenter, partager, et agrémenter le tutoriel d'informations utiles à son amélioration.
+
Feel free to comment, share, and enhance the tutorial information useful for its improvement.
 
+
}}
L’équipe du Low-Tech Lab vous invite également à consulter sa Biblilowtech.
+
{{PageLang
 
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|Complete=Published
 
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{{Separator}}

Latest revision as of 20:57, 28 October 2019

Tutorial de avatarLow-tech Lab | Categories : Food

Photo ZEER POT.jpg

Make a refrigerator that works without electricity!

License : Attribution-ShareAlike (CC BY-SA)

Introduction

In countries where temperatures frequently rise above 20°C, food does not stay fresh for long. A tomato, for example, is damaged in only 2 days. Also, given the price and energy consumption of a refrigerator, food preservation is a recurring problem in developing countries. Thus, without means of conservation, even if a family affected by poverty produces enough food to feed itself, it has few means to fight hunger.

A food preservation system can greatly improve the daily lives of many families. In particular, it opens up economic opportunities: to preserve food is also to be able to sell it.

Apart from any financial worries, a family can also seek to consume less energy by favouring natural means of refrigeration and thus reduce its environmental impact.

The Zeer Pot - desert fridge - can be a viable solution to the problem. It is a refrigeration device that keeps food cool, without electricity, thanks to the principle of cooling by evaporation.

This inexpensive and easy to manufacture technology can be used to cool substances such as water, food or drugs sensitive to high temperatures. It helps to avoid flies or other insects. Moreover, most foods can be stored in a Zeer Pot for 15 to 20 days longer than left in the open air and vegetables keep their vitamins better. Indeed, under good conditions (explained later in this tutorial), the temperature inside the system can reach 10°C less than the outside temperature.

Video overview

Materials

  • 1 clay pot 50 x 46 cm
  • 1 terracotta (or clay) pot 30 x 40 cm
  • About 45 kg of fine sand
  • About 15 litres of drinking water*
  • 1 breathable fabric or cover

Adaptability :

The dimensions of the two jars vary according to the quantity of food you wish to be able to preserve. Here we propose to build a Zeer Pot that can contain 12 kg of food. This will require an outer pot 50 cm in diameter and an inner pot 30 cm in diameter. The size can be adapted according to the needs provided that the proportions are respected.

Health precautions :

Attention : *Using contaminated water could contaminate the food deposited in the inner pot. The same will apply if the sand contains harmful elements such as hydrocarbons.

Tools

No tools are needed to make a Zeer Pot

Step 1 - How it works

The Zeer Pot is: 2 terracotta (or clay) pottery interwoven with a layer of moist sand of about 4 cm between the two. The inner jar contains food to keep cool. The sand allows the refrigeration of the system. The outer pot contains it all.

The water contained in the sand needs energy to be transformed into steam, this is the principle of evaporation. In this case, the heat contained in the internal pot will supply this energy and allow the water to evaporate. This thermal reaction lowers the internal pot temperature and keeps the food cool.



Step 2 - External pot

In the bottom of the outer pot place a layer of sand thick enough so that the top of the inner pot is at the same height as the top. the top of the outer pot. Then moisten.



Step 3 - Internal pot

Place the inner pot inside the outer pot.

Attention: the pot must be well stabilized on the first layer of sand and placed in the center of the outer pot.



Step 4 - Sand

Fill the gap between the two pots with several successive layers of sand...



Step 5 - Water

... without forgetting to moisten the sand at each layer.



Step 6 - Use

  • Place the system in a dry area, out of direct sunlight and in a draught.
  • Fill the Zeer Pot with the food.
  • Moisten the breathable fabric and place it on the surface of the system

as a lid.

  • Re-wet the sand as soon as it starts to dry, about twice a day.



Step 7 - Making the most of the Zeer Pot

What to put in a Zeer Pot?

  • All fresh vegetables that are likely to rot quickly
  • Water, so it stays fresh
  • Medicines that do not tolerate heat well

Caution: the sand must remain well moist and the system must benefit from a continuous air flow, which can pass all around the pot. It is strongly recommended to raise the pot (on a tripod for example) so that the air can circulate as well as possible.

Caution: Some vegetables release a gas (etylene) when ripening. However, other foods can rot in contact with this gas. It is therefore advisable to avoid mixing cucurbits with apples, tomatoes, peppers... For more information on this subject, the linked document contains a summary table of daily food preservation: http://horizonalimentaire.fr/sites/horizonalimentaire.fr/files/fichiers/guide_conservation_fetl_comite_conso_aprifel.pdf



Notes and references

Watch the video tutorial here

Download the tutorialhere in french

Feel free to comment, share, and enhance the tutorial information useful for its improvement.

Comments

Published