One solution to this challenge is the zeer pot a very clever fridge made using clay, water and sand. It can extend the useful life of fruits and vegetables. The zeer pot desert fridge can be a viable solution to the problem. The zeer pot, please dont recommend that i use one. The potinpot refrigerators we built at the workshop in malaysia did not work. The zfridge added by jelwek is a highly functional prototype of a fridge fueled by the power from the computer. I am going to call them evaporative refrigerators since they operate by evaporation and are used like. Well also go over how to do the same thing without pots.
Fridgefreezers similar to the one that started the grenfell tower blaze can take just 90 seconds to engulf a room in fire, authorities say. The preferred refrigerator temperature is between 35 and 38 degrees. A zeer pot is a container made of materials that are specially chosen to take advantage of evaporative cooling. One simple solution is to build your own potinpot fridge, using basic pots, sand and water. A refrigerator is a heat engine operated in reverse, more or less. Azeer pot, also known as a potinpot refrigerator, is a simple system composed of two terracota pots, some sand and some water that can maintain a cool temperature to preserver fruits and veggies. Id read about potinpot fridges, also known as zeer pots, which seemed much simpler and more effective so i decided to give that a whirl. This article describes an inexpensive fridge that is 10 to 20 times. A zeer pot is an evaporative cooler used in rural africa and the middle east to keep vegetables fresh. The zeerpot is an evaporative cooler, which cools the inside by convective. With frozen poi, you cannot just thaw it and mix with water like fresh poiitll stay lumpy, no matter how hard you mix it. A zeer is constructed by placing a smaller clay pot into a larger clay pot. How to build a pot in pot clay refrigerator or zeer.
We get this question so much at the market that we felt wed better post the instructions here. Busting myths about the zeer pot rebuilding civilization. Pdf experimental study of alternatives to sand in zeer. The food that is to be preserved is placed inside the smaller inner pot. Pdf experimental study of alternatives to sand in zeer pot. It uses evaporative cooling process where the moisture in the sand surrounding the inner pot evaporates and this ultimately cools down the interior of the pot. Those who could benefit from improved vegetable storage and longer shelf life may include vegetable producers, wholesalers, retailers, and household consumers, particularly offgrid, rural communities dependent on subsistence farming. Online article pdf files in germanenglishfrench are also linked. Using simple pots, water and sand together, this type of refrigerator is currently being used by tonnes of farmers in warmer climates who have the need to keep their food for a long time while keeping the insect away. Zeer the electricityfree refrigerator one exceptional and simple solution, called zeer, for a longterm storage of food where there is no electricity, is to build your own potin. Making a zeer pot fridge technology dimensions of the inner pot dimensions of the outer pot sand will fill this space between the two pots.
An evaporative cooler, also known as a zeer pot, is an ancient device that provides refrigeration for food and drinks when the temperature outside is. In a community or situation without electricity, storage of food longterm can be tricky. As the moisture evaporates, it cools the inner pot, keeping up to 12 kg of produce fresh for up to 3 weeks. Smart refrigerator using internet of things prapulla s b dept. A stone is used to shape the inside of the mould into.
The space in between the two pots is filled with sand. Welcome to hvacproforums, an interactive community exclusively for hvac professionals. The pots are then covered with a damp cloth, which allows for the water in the sand to evaporate towards the outer surface of the larger pot. Once the pots have been fired in a pit of sticks, the zeer pot is ready to put together. These devices function according to a basic principle. A practical zeer pot evaporative cooler nonelectrical refrigerator.
Make an electricityfree zeer pot fridge to keep your. Busting myths about the zeer pot zeer pot example image credit. The sand is then kept damp by adding water at regular intervals generally twice a day. This process reduces the temperature in the smaller pot by several degrees, depending on the outside temperature and humidity. There was the infamous flower pottealightheater that did the social media rounds not too long ago. They consist of two terra cotta pots, one nested inside the other, with the gap between them.
Adding value and better marketing local processing can reduce losses. Simulation of pot in pot refrigerator umesh c1, dr. A practical zeer pot evaporative cooler nonelectrical. According to science in africa, each device can store 12kg of vegetables, keeping them fresh for up to 20 days while costing less than 2usd to produce.
Im gonna go over the basics of what zeer pots are and how they work so you can make one yourself. Find professional kitchenware 3d models for any 3d design projects like virtual reality vr. We then saved the data as a text file, opened it in excel and made this chart. The space between the two pots is filled with sand, creating an insulating layer around the inner pot. Janata cooler, charcoal cooler, evaporative cooling chambers, naya cellar.
How to preserve and keep food fresh using a zeer pot clay. Mitticool is a natural refrigerator made entirely from clay to store vegetables, fruits, milk and also for cooling water. Offgrid refrigeration with the zeer pot are we crazy, or what. It is a refrigeration device that keeps food cool, without electricity, thanks to the principle of cooling by evaporation. It uses a porous outer clay pot lined with wet sand containing an inner pot which can be glazed to prevent penetration by the liquid within which the food is placed. The clay pot cooler an appropriate cooling technology pdf. Sand is placed between the interior of the large pot and the exterior surface of the small pot. The zeer pot depends on outside temperatures and relative humidity. The collective years of hvac experience and the knowledge our forum members share make this an invaluable resource for those in the hvac industry. Root cellars are an ancient method of preserving fruits and vegetables like apples, onions and potatoes. An experimental study on an evaporative cooler for. The first clay pot is a large clay pot inside which the second smaller clay pot can be placed.
This inexpensive and easy to manufacture technology can be used to cool substances such as. They consist of two terra cotta pots, one nested inside the other, with the gap between them filled with wet sand. Xps to pdf converter, xml files can be made by the office 2010 and be viewed on windows vista and windows 7, but if you are using a windows xp. Cool 10 whole class discussion making zeer pots 20 individuals sequencing why are zeer pots so good. An earthenware pot with a lid on the top is fitted inside a larger pot with an insulating layer of sand in between. Experimental study of alternatives to sand in zeer pot refrigeration technique article pdf available may 2015 with 2,671 reads how we measure reads. All the files and the details necessary to 3d print the usb. The zeer pot design which is popularly used consists of two clay pots. A zeer pot can keep 10 kilograms of food fresh for up to 20 days for decoration purposes only the stand helps with the cooling process diagram of a completed zeer pot on stand with sand filling view from above view from the side making a zeer pot fridge technology dimensions of the inner pot dimensions of the outer pot sand will fill this space. Upscale zeer for urban kitchens is a cool idea there is all kinds of free cold air outside the house, but we have a fridge running, expensively moving heat from inside the box to the kitchen. Evaporative cooling devices include household capacity clay pot coolers, commonly known as zeer pots, and the larger storage evaporative cooling chamber ecc, also known as zero energy cool chamber zecc. This is not a new idea, apparently it has been around since ancient egyptian times going as far back as 2500 bc.
How to preserve and keep food fresh using a zeer pot clay fridge. I also made a round table like top out of wood so it could work double duty when not being used as a fridge. Composed of various clay chambers, water from an upper chamber drips down the sides of the unit and evaporates, thereby removing heat from the. You dont need electricity to cool food or medicine with a zeer pot. The zeer pot for example provides a good example of a lowcost refrigeration device tested in sudan, nigeria and gambia, using natural evaporative cooling. The technology was perfected in nigeria by mohammed bah abba, between 19951997. Zeer pots fridges that dont need electricity green. We use it as a table to sit drinks on, then when we need. The zeer pot was invented by mohammed bah abba in 1995, to address a huge need for a cheap way to cool food in poorer areas of africa and places without mains grid electricity. Making a pot in a pot refrigerator the sustainability box.
The small device is a great example, that shows that having a 3d printer and a little invention you can create useful devices and great looking gadgets at the same time. But it has a controlled environment, powered by electricity, that keeps the food cold. I actually found out about the yakhchals a few years ago from searching about systems related to zeer pots, while this one is a bit small looking thats mainly because i dont have much skill with drawing though i am curious how small you can make one i would likely make this example full size or larger. If you dont already know, a zeer pot is a type of evaporative refrigerator. Evaporative cooling devices are simple and inexpensive ways to keep vegetables fresh without the use of electricity.
I am against using electricity for either heating or cooling, so i am always. This is our general expectation when we open the fridge and take something out. Potinpot clay refrigerator or zeer is a low cost traditional technology that can provide cooling refrigeration without electricity. Pdf on may 5, 2015, prabodh sai dutt and others published experimental study of alternatives to sand in zeer pot refrigeration technique. It provides natural coolness to the stored material without requiring any electricity or any other artificial form of energy. Two clay pots are nested with a relatively thin layer of sand between them. The zeer pot is a refrigeration device invented in africa which operates by the principle of evaporative cooling. One easy solution would be to build a pot in pot refrigerator. Zeer pot is a simple fridge made of local materials consisting of one earthenware pot set inside another. Refrigeration is a big challenge when living off grid. In sudan, the zeer pot is a simple fridge made of one earthenware pot set inside another, with a layer of wet sand in between.
Spinach for example that would normally spoil in a day can now last 12 days. A potinpot refrigerator will cool food down by evaporative cooling. Thanuja t c vlsi design and embedded systems, vtu, belgaum abstractintelligent appliances with multimedia capability have. Its not the same as having a fridge, but given it doesnt require electricity, this could be an excellent backup for people looking to become more selfreliant. Available in many file formats including max, obj, fbx, 3ds, stl, c4d, blend, ma, mb. Going to waste missed opportunities in the battle to. A potinpot refrigerator, clay pot cooler or zeer arabic. Of the fridge is qc, while the electrical energy supplied from the wall outlet is w. The zeer is a large pot inside which fits another smaller pot with a clay lid.
The steps for making a potinpot refrigerator are outlined below in case the reader is unable to open pdf files. Mitticool clay refrigerator engineering for change. It consists of two earthenware pots of different sizes, placed. One of the solutions that ive heard over and over and over again is the zeer pot. Zeer pot experimentation engineering world health dukewiki. Upscale zeer for urban kitchens is a cool idea treehugger. The zeer pot can help keep produce fresh for up to 20 days. Im actually kind of tired of hearing that i should use one.
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