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FOG HARVESTING IN THE DESERT A L ! A L a b o r a t o r y | C l a u d i a M. | Y a s m i n e V.


FOG HARVESTING IN THE DESERT A L ! A L a b o r a t o r y | C l a u d i a M. | Y a s m i n e V. PARAMETERS

[1] situation

[2] time-scale

Some places tend to contain more favourable conditions for the formation of fog and frost than others. Fog and frost appear in places with little wind, like valleys, away from the ocean where the temperature differences between night and day are bigger, and of course in colder environments. The purpose is to create a pavilion that can be put anywhere in the world and lets you experience fog and frost, even in a desert where it is hot and dry, there it will be used as a moisture machine, recollecting moisture and changing the landscape. When placed in fog and frost it willl allow you to 足experience the phenomena in greater extense. [1] The 24h time lapse was chosen after investigating the formation of fog / frost. Both are very ephimeral and fluctuating phenomena as they appear at a concrete time of the day when the conditions are favourable. Applying this time lapse to the idea of an oasis water recollection system the condensation cycle has to be taken in consideration. [2] Condensation in the desert is formed because of the huge difference of temperature at daytime and night-time. Because the temperature decreases at night, the water in the air also does. The excess of water (from daytime) in the air, finds itself a way down to the earth on plants, rocks, grass and 足buildings. This created fog, arising at early mornings and disappearing at noon, will be used as a nourishment of the oasis. When looking further over time a second changing cycle can be distinguished. The actual landscape is changing from a dry, dead, sandy environment to a humid, vivid, green oasis. [3]


FOG HARVESTING IN THE DESERT A L ! A L a b o r a t o r y | C l a u d i a M. | Y a s m i n e V. FOG OCCURING IN DESERT

[3] fog appearance


FOG HARVESTING IN THE DESERT A L ! A L a b o r a t o r y | C l a u d i a M. | Y a s m i n e V. HARVESTING SYSTEM

[4] fog harvester

[5] polypropylene mesh Fog harvesters are made out of a porous plastic mesh, i.e. polypropylene mesh, which traps the water droplets in the fog. The water runs down into troughs and then via pipes into a holding tank. [4] [5] A fog collector can be found in different shapes, linear, similar to a fence or cylindrical. It is a passive water recollection system, as it does not require any external energy source to perform. [4] Fog catching devices can be the solution for the widespread potable water problems in many villages. Fog harvesting is based on the fact that water can be collected from fog under favourable climatic conditions. Fog is defined as a mass of water ­droplets that are moved through wind. When this water mass runs through the fine net of a fog catcher it gets caught and it drops down, thanks to gravity. We can use this method in our advantage, using the collected water to change the landscape and create an oasis in the desert. [5] Ringier Trade Media Ltd. (2013), Worldâ&#x20AC;&#x2122;s First Long-term Absorbable Mesh, Novus Scientific, <http://us.industrysourcing.com/articles/250468.aspx> [accessed: 24/11/13]


FOG HARVESTING IN THE DESERT A L ! A L a b o r a t o r y | C l a u d i a M. | Y a s m i n e V. PROBES | FORMATION OF POOLS

[6] visualisation 1

[7] visualisation 2


FOG HARVESTING IN THE DESERT A L ! A L a b o r a t o r y | C l a u d i a M. | Y a s m i n e V. PROBES | FORMATION OF POOLS; CONCLUSION

[8] membrane angle

To obtain a covering optimal for the system of fog 足harvesting and creation of a growing oasis, a test onto the previous final model was done. By 足spraying the model with water, i.e. creating fog, different results in relation to the angle of the membrane and wether or not the membrane was treated with epoxy, were discovered. [6] [7] The steeper the angle of the membrane, the faster and the more fog it can collect. Fog is moving horizontally in the air. When the membrane is p足 ositioned totally vertical, the membrane has the biggest surface for catching fog and is therefore the optimal sollution. Ofcourse to create a covering different angles of membranes are necessary to create shading. When the membranes are treated with epoxy, the water glides down more easily and faster. [8] The idea is to create a slightly changing oasis, to create a varying experience when inside the oasis. This would make it more clear where people could enter the covering and were than guided into the oasis. For this purpose the angles of the membranes slightly change from less steep and thus less opaque oasis to steep and thus more opaque oasis. Surplus the membranes covered with epoxy will guide the droplets more easily. [8] [9]


FOG HARVESTING IN THE DESERT A L ! A L a b o r a t o r y | C l a u d i a M. | Y a s m i n e V. PROBES | FORMATION OF POOLS; CONCLUSION

[9] membrane angle; [10] pools forming


FOG HARVESTING IN THE DESERT A L ! A L a b o r a t o r y | C l a u d i a M. | Y a s m i n e V. MEMBRANE CONFIGURATION

[11] axonometry


FOG HARVESTING IN THE DESERT A L ! A L a b o r a t o r y | C l a u d i a M. | Y a s m i n e V. DETAIL | MEMBRANE ATTACHMENT

[12] connection


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FOG HARVESTING IN THE DESERT A L ! A L a b o r a t o r y | C l a u d i a M. | Y a s m i n e V. BODY | COVERING

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[13] membrane density and relation to surroundings

Depending on the result wanted, the membrane density and the positioning of the angles change. On the side, which opens up to the surroundings, and is to be used as an entrance, the membranes are less layered, letting more light in and collecting less water. Less water pools are formed and thus not so many plants will grow here. On the closed and sheltered side the membrane layering is more dense, the membranes are placed on a steeper angle. More water is collected and more water drops down. Water pools are easily formed and more plants will grow on that side, closing the pavilion and obstructing the view to the 足surroundings. The difference in membrane layering and angle does not only create a visual impact on the visitor, it also changes the ground and the environment in a way that the placement of the membrane produce an instant reaction on the ground. The fog harvesting system interacts with the body and the surroundings on many levels. Remaining always on constant development the personal 足experience of the visitors may vary depending on the time of the day or the year, being exposed to different shadows or vegetation.


FOG HARVESTING IN THE DESERT A L ! A L a b o r a t o r y | C l a u d i a M. | Y a s m i n e V. MODULES

[14] membrane interrelation

[15] upper membrane grid

[16] lower membrane grid

For the membranes, a modular connection system was created by joining them on different points with each other. The membranes interrelate in 足different ways depending on their connection type creating a homogenous cover on the outside and a lively inside space. [14] The ways the membranes are placed on the inside depend on how much water should drop to the ground. The steeper membrane connection is placed north where the membrane layering is denser, and more water should be collected. The membranes on the inner side / layer of the pavilion are frozen so that the water drops easily to the ground. Membranes covered in epoxy allow water to drop, while uncovered membranes catch the water with ease. [15] [16]


FOG HARVESTING IN THE DESERT A L ! A L a b o r a t o r y | C l a u d i a M. | Y a s m i n e V. TIME-SPEED | 24h CYCLE

[17] sun shading cycle

[18] day vs night


FOG HARVESTING IN THE DESERT A L ! A L a b o r a t o r y | C l a u d i a M. | Y a s m i n e V. TIME-SPEED | 12y CYCLE | PLANT GROWTH

[19] phase 1

[20] phase 2

[21] phase 3


FOG HARVESTING IN THE DESERT A L ! A L a b o r a t o r y | C l a u d i a M. | Y a s m i n e V. VISUALISATION | INSIDE VIEW

[22] visualisation inside



Fog Harvesting in the desert