brkt: drawing two [enabling]

November 30, 2008

Explicating the method of fog farming and potential applications for water derived.  I think this focuses on the enabling properties of the infrastructure, bracketing both the generative qualities (generative qualities I think would probably include the architectural qualities of the infrastructure, as well, as noted here with thoughts on tube perception) and strategies for deployment.

Components of the drawing, then:

1. the fog farm

a. structure for harvesting
in terms of material construction, this would be a typical fog farming setup.
study of three types of fog nets in Oman

2. uses of water

a. algae tubes

should include some indication of what the algae tubes are, as well as subuses.

i. algae create power

ii. cleaned water can be used for other (2) uses

b. growing plants

c. drinking water

diagram of the diagram [which is not intended to show graphic intent; nor is that sickly green color on the left something i was going for.  cmyk–>rgb fail]:

drawing-2_enabling_concept-sketch

[this page supersedes “the technique of fog farming”, I think]

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brkt: planting strategies 1

November 24, 2008

potential vegetative uses for moisture generated by fog farming:

1. to grow green roofs

2. to grow food

3. to nourish plants which hold back the desert:

dune-planting-1

dune-planting-2

[images from The Sahara: An Ever Present Challenge, a document about using vegetation to halt or restrict the growth of desert.]

on primary succession on coastal dunes in England (a different problem, but related)

a book on coastal dunes that may or may not be worth tracking down, depending on whether this becomes part of the project or not.

an article from israel on the ecology of dunes.  quite useful.

[THIS POST HAS BEEN SUPERSEDED]

a. pulling water out of the air
seems like there are two methods of fog farming:

1. relies on cooling air to produce condensation

(a) examples:

– windcatchers:

windcatcher

A traditional Persian architectural device, used in conjunction with subterranean qanats.
wikipedia

While this article suggests that the windtraps (windcatchers) are used for producing water, I think they were more typically used to cool air for climate control and refrigiration:

“Windtraps for water production have been used here on Earth for thousands of years. They are pyramid shaped strutures made out of loose stones so that the wind can blow through them. They work best in desert areas where the difference between day and night temperatures is 30 degrees or more. Moisture in the air condenses on the stones as they are cooled at night like the condensation on a glass of cold water. It drips down and collects in a catchbasin. These devices worked even when the humidity was very low.”

– “WaterMill”

uses a small amout of electricity for refrigeration, see bldgblog

– Whisson windmill

not sure about this one, but here is a link.

2. relies on using a large surface area plus natural condensation (dewing) to trap water

(a) examples:

– fog nets (see older post)

b. what happens to the water after it is condensed?

1. used to feed algae tubes; this would (a) purify the water through biological process (b) produce energy perhaps as well (c) provide shade (providing shade is probably more properly a thought about the affective qualities of the tubes).

Does the potential ease of collecting solar energy in these locales advocate against (because the algae tubes would be unnecessary/redundant) or for (because algae, of course, also depend on solar energy) the use of algae for energy production?  I’m not sure.  I tend to think its a wash.

2. feeds into planting, potentially rooftop planting or other a form of agriculture; this does not require purification, as plants would perform the purification.

3. ultraviolet purification system, a la watermill

4. How does the post-condensation use of the water relate to the urban system?  That is, how is it programmed to effect desirable changes?  For instance, the availability of clean and pure drinking water or potable water for gardening might be social justice issues in a city such as Dubai or Nouakchott.

associated content:
initial post on fog farming