Talk:Windcatcher

message: There is no description of the specific design or physical structure of a windcatcher. 128.42.160.92 08:16, 26 September 2006 (UTC)
replies: text: Venturi effect? From the description is does not become clear whether or not the Windcatcher is equipped with a cap to create a Venturi effect to create an updraft whenever there is a breeze. The phrase "....whenever a breeze or wind passes through the tip of the windcatcher..." suggests something like that, but no details are provided about the design of the tip of the windcatcher. See The Log Rack or Cap That Chimney for how such a cap may look like.  JdH 11:33, 20 October 2006 (UTC)
thread_title:  Description 

message: Article states this:
"First, a windcatcher is capped and has several directional ports at the top (Traditionally four). By closing all but the one facing away from the incoming wind, air is drawn upwards using the Coanda effect"
However the diagram shows two open ports. The downward draught shown in the diagram is also problematic - surely it illustrates hot air is being sucked in and down - that can't be right? I find the article badly describes the physics of the process. I'm not even sure if the Coanad effect is relevant - sounds more like a venturi effect. Additionally the discussion of cracks in the building is unclear. The cooling of the water in the qanat by the night air and then cooled further still by evaporation, combined with the stack effect does make sense. Also how are the wind ports operated - shutters on a string and by whom?  —Preceding unsigned comment added by 124.191.112.44 (talk) 23:02, 10 March 2008 (UTC)
thread_title: Ports

message: There are photos of Hyderabad, Sindh, which have Windcatchers. I have a photo fron from 1928. So they were in India too. I was told there there was a cord called a 'mungh'.....  
In this photo of hte city of Hyderabad, there are hundreds of rooftop wind catchers in Hyderabad, Sindh.
Given the sheers number windcatchers, it is possible that wind cathers originated from Hyderabad and were taken to Persia.—Preceding unsigned comment added by 84.13.186.174 (talk) 19:43, 23 September 2008 (UTC)
replies: text: It would be interesting to see these photos. The 1928 photo would certainly not have any copyright problem. If you'd like to post it, I can help you with that. — Sebastian 17:54, 19 November 2008 (UTC)
thread_title:  Windcatchers in Hyderabad, Sindh 

message: Add Global warming text to bring into more relevance to make this a :Category:B-Class Environment articles, such as 350.org?  Possibly up to a :Category:FA-Class Environment articles, such as Retreat of glaciers since 1850?  209.255.78.138 (talk) 16:32, 9 February 2010 (UTC)
replies: text: Why? I don't even see this as environment-related.  — Arthur Rubin  (talk) 20:46, 9 February 2010 (UTC)
thread_title:  Add [[Global warming]] text to bring into more relevance to make [[:Category:B-Class Environment articles]], such as [[350.org]]? 

message: I am brand new to posting and navigating in 
wikipedia, but previous comments and questions observing why a Texas ranch house employs so little of the features of hot arid indigenous architecture should inform and be informed by discussions of Passive Solar on wikipedia. I was urging they refine the term to Passive Energy, because culturally honored implemented strategies such as Windcatchers have to do with other energies than actual solar.  These middle eastern (and african?) windcatchers, whatever regional differences and names they may have, are all very important  examples of Passive energy implementation. Besides high and low pressure and prevailing winds being harnessed, in arid environments, evaporation is used. The United Nations University online library has available free Hassan Fathy's book including sections showing the use of evaporative cooling as hot air is taken in, passed through wet baffles, then pulled into inhabited spaces and the air is sucked out the wind tower. I have never seen the underground canal. cool!!!Recall that because the dry air has more room for moisture, liquid water undergoes a full phase change, as the dry hot air confronts wet baffles. As the matter changes from liquid to gas, an amount of energy is absorbed (enthalpy)just to cross the phase change threshold. So the hotter, dryer the air drawn in to hit the baffles, the better. Because of enthalpy, heat energy seems actually removed, transforming from heat energy to the kind of energy required to elevate matter to a higher phase state. (liquid to gas) This passive energy approach totally takes advantage of the actions of naturally occurring energy in a hot hot dry climate.
Why don't we use passive energy like this more often in American architecture? for one, only hot arid climates can apply this technique. In part, this requires cleaning and operation more extensive than flipping a switch, but today people might find it worth it to do a little operations to approach a zero energy home.
Also, it seems many consumers in the USA are conditioned to expect an authoritative solution to be one that overarches rather than addresses regional cultural and climate specifics, but efforts do try to counter this: I learned of Hassam Fathy from a conference in Tucson, Arizona in a lecture delivered by an Australian. These  beautiful well drawn and documented middle eastern examples belong linked over in Passive energy. Some will say "How can we be expected to live and build like medeival middle easterners?"  This culturally based body of knowledge can be a solid foundation to springboard innovative technologies: for example, there are now available inexpensive, self contained  solar powered attic fans being produced with small thin film solar panels. If the strategy is clear, why not, for example,  use active solar  attic fans to boost passive solar strategy parallelling the traditional  Windcatcher system ?(One would need to  include the  whole system, including specialized air intakes, not just the more visible tower manifestation) So this Windcatcher information needs to be accessible (linked?) to those discussing Passive energy. How do you do that? It's a great article, but under the name windcatcher it gets lost, and under what appears to be ever more specilaized even more regional names may only be more obscuring, although all the variations and specializations per specific locales are to the credit of the soundness of the strategy. This is Passive energy, or as Fathy calls it, Natural energy at its best, and more should be aware that it exists.  —Preceding unsigned comment added by Mariecamille (talk • contribs) 01:50, 2 June 2010 (UTC)
thread_title:  Yes, Indigenous Architecture is essential to define and promote Passive Energy 

message: Is there not something on a gopher tunnel using 2 exits at different elevation?
G. Robert Shiplett 12:08, 12 June 2012 (UTC)
thread_title:  gopher holes 

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thread_title:  External links modified 

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thread_title:  External links modified 

message: Do you think we should connect this page with the page Ridge vent? It can be merging or just put a "Further" link or connecting in other way. Recommend to see the page before answer. Alexander Sauda/אלכסנדר סעודה (talk) 10:10, 13 September 2023 (UTC)
replies: text: A ridge vent is just one modern iteration of a windcatcher concept, so it's a "see also". Iskandar323 (talk) 12:28, 13 September 2023 (UTC)
thread_title:  Connecting the page with the page Ridge vent?