Talk:Air conditioning/Archive 1

This article
This article is the result of spliting air conditioner -- this air conditioning article covers the general history and theory, while air conditioner is about specific types of equipment. 129.237.114.171 19:21, 14 November 2006 (UTC)


 * Note: this needed split is similar to refrigeration vs. refrigerator. 129.237.114.171 19:23, 14 November 2006 (UTC)

I don't think this page is very imformative and the explanation of how air conditioning works is not very clear. More information is needed, such as the first bulidings that were air conditioned. How it opened up the warmer parts of countries to developement etc. Air conditioning has had a very large impact on our society and this should be included in this article Hvac stand for Heating Ventalation and Air Conditioning. —Preceding unsigned comment added by 167.196.235.76 (talk) 14:55, 6 March 2009 (UTC)

Chiller
As of December, 2007, this page is not talking to the Chiller page. There is also much more technology background than the article presents. For example, up through the 1950s home air conditioners powered by natural gas were fairly common, working with either lithium bromide or ammonia solutions. These and similar technologies are found in "absorption chillers" today but mainly in units scaled for commercial and industrial use, although smaller units are available in Australia and Japan. —Preceding unsigned comment added by 151.199.40.61 (talk) 10:08, 3 December 2007 (UTC)

No one cares what you think! Keep your thoughts to yourself! —Preceding unsigned comment added by 167.196.233.127 (talk) 12:36, 28 May 2009 (UTC)

Thermal Shock
Hello, I undid the comments by Auvi82, because the absence of a thermal gradient would mean that the two temperature are the same (dT/dx (or dT/dt) =0, integrate T = c). I assume you meant that if the temperature gradient is too steep a person faces thermal shock. To what extent is thermal shock an issue for humans? Does a temperature change of 5-10 deg. C cause a problem? I don't know, and we should endeavour to find some authorative comment on this. User A1 12:44, 20 February 2007 (UTC)


 * From personal experience going out-of-doors in the winter, it would need to be a change of more than 50 degrees C. --Carnildo 21:37, 20 February 2007 (UTC)
 * It may vary for example the young and elderly may have problems. Either way, I think the statement is out for now. User A1 00:18, 21 February 2007 (UTC)

Thermal shock in England (from my 30 years experience) mainly happens (or will happen) when you walk in to say a shop from a high outdoor temperature, to a lower temperature. This happens when over 10degF (5.5degC) difference, that's why some shops (with good controls systems) track the outdoor temperature i.e. out doors 80degF - indoors 70degF, then outdoors 85degF indoors 75degF etc. Relative Humidity (RH) is also a factor, a lower indoor RH can make things worse.


 * Unfortunately we need verifiable information, not anecdotal information or original research. Perhaps there exists some peer reviewed data on this User A1 17:55, 25 May 2007 (UTC)

Thermal Shock is a very serious thing and you people need to quit acting like its ok and doesn't matter. —Preceding unsigned comment added by 167.196.233.17 (talk) 14:11, 8 April 2009 (UTC)
 * Again, being so serious, there will be an abundance of peer reviewed medical literature available, please find it and include it. User A1 (talk) 23:00, 8 April 2009 (UTC)

Please remove the advertisement at the end of the page
I'mm not sure how so i think I'll just delete the offending material, and if someone wants to clean up the rest.... then cool —The preceding unsigned comment was added by 203.153.253.16 (talk) 18:06, 1 April 2007 (UTC).

moved "vapor-compression refrigeration cycle" and "refrigerants" sections
to the existing subject article vapor-compression refrigeration where this is more pertinent and useful as an introduction. In this article, let's focus on air conditioning with references but not put much detail about the technologies used to move the heat. Bernd in Japan 23:48, 28 June 2007 (UTC)

Need information on natural gas air conditioning
A long time ago I owned a house with a natural gas air conditioning unit. I had no idea how it worked; all I know is that every summer I had to light the pilot light in the outdoor compressor unit. A Google search for "natural gas air conditioning" yields many hits saying that these units were common in the 1930s-1940s, but none explain how it works! How the heck do you burn gas to get cool air?? =Axlq 17:05, 7 July 2007 (UTC)
 * I have no knowledge of your system in particular, but I can hypothesise: Depressurising a gas to room temperature will cause the gas's temperature to decrease, see Joule-Thomson effect, which will allow you to remove heat from a system. This can be achieved using a throttling valve. If you then flow the gas across an insulating boundary use a compressor, you can repressurise it and send it back through the throttling valve. The compressor can be powered using a natural gas combustion engine, which is powered by tapping the expanded (depressurised) gas and feeding it into the engine with some air, thus powering the compressor. You could simply drive the compressor with natural gas and use R22 as the refrigerant, which is probably more efficient, as the chemical properties of R22 means it has a really nice Rankine_cycle diagram for air conditioning, better than HFC-134a. Of course you would put the compressor *outside* the area to be cooled ;) User A1 08:32, 12 July 2007 (UTC)
 * This is probably the system. When I was living in one room I bought a small refrigerator that used this method of operation because it was silent and wouldn't keep me awake at night. I only knew that it worked on ammonia: had I known about the hydrogen I might still have stayed awake at night!--Old Moonraker 10:25, 12 July 2007 (UTC)

Requested article
It might be a good idea to write an article about the specific application of air conditioning in vehicles (namely, cars). Such an article might talk about its history, the first (crude) units and how expensive they were, and how it was improved through the years to be almost standard equipment on every car. Briguy52748 14:34, 11 October 2007 (UTC)]]

air conditioner
our wire connector's on our outside unit keeps burning up. we replaced them with 12/10 gage but for some reason they are burning up and the air quits blowing cold then. does anyone know how to fix this? thank-you fun1_47@yahoo.com —Preceding unsigned comment added by Fun147 (talk • contribs) 22:02, 14 June 2008 (UTC)

Automotive A/C
This article doesn't discuss air conditioners in cars, or any other forms of transportation for that matter (busses, planes, etc.), which seem to represent a large percentage of one's real-world encounters with air conditioners. In any case, the "applications" section seems only to explain WHY A/C is used ("humans perform tasks most efficiently at 72 degrees F", etc.), rather than how or in what ways it is applied and utilized. —Preceding unsigned comment added by 76.175.149.174 (talk) 23:03, 9 July 2008 (UTC)

"Lowest" performance for people at 72° F??
The article states:

"The lowest performance for tasks performed by people seated in an office is expected to occur at 72 °F (22 °C)"

... and things get worse from there.

Surely the correct statement would be "the highest performance"? (I don't know, so I won't edit it myself.)

Dan Griscom (talk) 18:25, 17 July 2008 (UTC)

Heat wheel aka Kyoto cooling
The heat wheel has been getting a bit of press lately, but Wikipedia doesn't have an article under that name (heat wheel). Searching finds Heat exchanger and Recuperator, both of which use the term without really explaining it. I know nothing about the subject, but can someone who does either write up a stub or redirect to the correct place if it's just a new label for old tech? Jpatokal (talk) 07:40, 16 November 2008 (UTC)


 * Hmm. Someone on Slashdot claims it's the same as a Rotating-plate regenerative air preheater. Yes, no, maybe so? Jpatokal (talk) 07:59, 16 November 2008 (UTC)

AC vs HVAC
Whoever wrote saying that hvac is high volume of air conditioning, should learn more before they type. Hvac stands for Heating Ventilation and Air-Conditioning. If any one disagrees with this claim just look it up on google. High volume of air, come on that's the stupidest thing I have read on wikipedia. All ac blows at high volumes that's how you get cool.

I agree with this guy that other dude needs to think before he types. —Preceding unsigned comment added by 98.164.156.77 (talk) 02:27, 4 April 2009 (UTC)

tank crews use personal air conditioners
I saw a program once showing that American tank crews had a personal air conditioning thing they wore over their chest. I can't find any information about it. There was also a news program I saw about a guy who invented a thing that cooled off your hand when you grabbed it, and that cooled your entire body, as body heat travels to the coolest part and is thus reduced at that one spot. Anyone know about this? It'd be a good addition to the article.  D r e a m Focus  23:56, 15 June 2009 (UTC)

Do you mean thermal wheel? —Preceding unsigned comment added by 86.186.170.116 (talk) 21:08, 20 April 2011 (UTC)

Environment and fat Americans
This article makes little mention of the affects on the environment of using air conditioning. It should also mention that although air conditioning is used in lots of countries it is the USA where they are omnipresent - even in hotter countries like Italy (where I am) and Spain they are used less frequently. It seems that fat Americans need (or think they need) air conditioning to cool down their obese bodies. Ignorant and overweight Americans are destroying this planet.--217.203.165.58 (talk) 16:29, 17 July 2009 (UTC)
 * Some places in the United States get really hot during the summer; hotter, I bet, than Italy or Spain. H Padleckas (talk) 20:22, 17 July 2009 (UTC)
 * WP:DNFTT User A1 (talk) 04:06, 19 July 2009 (UTC)
 * If you can reliably source it, then be bold and add it. Jminthorne (talk) 22:43, 23 August 2009 (UTC)

Some years ago a heat wave killed more than 40,000 people across Europe. No air conditioning and nowhere to go for relief. You Europeans are so much smarter than the fat Americans. Not. — Preceding unsigned comment added by 50.32.4.182 (talk) 23:36, 16 June 2011 (UTC)

Rule of thumb
The article currently states: "'As a rule of thumb, 400 square feet (37 m²) can be cooled per 12,000 BTU/h'." Shouldn't a reasonable rule of thumb express this in power per unit of volume instead of area? Furthermore, I can't imagine that this does not also depend, in fact quite critically, on the ambient temperature. What works well for Tunbridge Wells, where the temperature rarely if ever reaches 100°F, may not suffice for Death Valley, where July temperatures regularly exceed 130°F. (Also, why "400"? Why not simply: "As a rule of thumb, 3,000 BTU/h can cool an area of 100 sqft"?). --Lambiam 10:18, 30 July 2009 (UTC)
 * Good catch, I just pulled it, as it is not really a useful or realistic statement. User A1 (talk) 12:43, 30 July 2009 (UTC)

Definition
the term can refer to any form of cooling, heating, ventilation or disinfection that modifies the condition of air.

Can this be removed, any device that only does one thing (eg cooling air, ...) is called with its appropriate name instead (eg air cooler) —Preceding unsigned comment added by 81.245.91.30 (talk) 07:56, 16 August 2009 (UTC)

Again, as per other pages, I strongly disagree. For the record, a move suggestion has been made on air conditioner and air conditioning as well as evaporative cooler User A1 (talk) 10:07, 16 August 2009 (UTC)
 * A merge suggestion was also made from HVAC, which I have just closed per consensus. Jminthorne (talk) 22:46, 23 August 2009 (UTC)

drawing?
Can we please show a schematic diagram or simplified drawing of a typical AC system with all sub elements?

comfort cooling
This phrase may have a meaning or it may just be wallpaper. It needs to be explained or removed. —Preceding unsigned comment added by 80.189.103.145 (talk) 04:04, 4 December 2009 (UTC)

changing density altitude associated with changes in altitude
Is the first "altitude" a mistake? —Preceding unsigned comment added by 80.189.103.145 (talk) 04:11, 4 December 2009 (UTC)
 * It would appear so. I have fixed it, but you are more than welcome to edit any article on WP, as you see fit. User A1 (talk) 22:43, 4 December 2009 (UTC)

Misuse of sources
This article has been edited by a user who is known to have misused sources to unduly promote certain views (see WP:Jagged 85 cleanup). Examination of the sources used by this editor often reveals that the sources have been selectively interpreted or blatantly misrepresented, going beyond any reasonable interpretation of the authors' intent.

Please help by viewing the entry for this article shown at the cleanup page, and check the edits to ensure that any claims are valid, and that any references do in fact verify what is claimed. Tobby72 (talk) 16:51, 5 September 2010 (UTC)