The Physics Factbook™
Edited by Glenn Elert -- Written by his students
An educational, Fair Use website
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|Bibliographic Entry||Result |
|Air Conditioner Comparision Guide. Crosley.||[large chart]||1.3–9.5 kW|
|Quietmaster Electronic Product Specifications. Friedrich.||[see chart below]||2.4–4.1 kW|
|Hill, James E. Air Conditioning. Discovery School.||"The cooling capacity of air conditioners range from 4,000 to 36,000 Btu's per hour."||1.170–10.55 kW|
|Alan Blackham. Air Conditioners in the UK.||"… they could supply me with an installed type room air conditioner (ie the sort you see in shops which is bolted to the wall and has a big condenser outside) of 9000 btu for around 600 ukp …."||2.64 kW|
|Model||Cooling Capacity |
(Btu's per hour)
|Volts Rated||Cooling Amps|
Air conditioners are used to cool, control humidity, circulate the air, andalso to filter the air. The most important application of air conditioners istheir cooling capabilities. For example, certain industries require the air tobe a certain temperature in order for the plant's production to go on. Thus, airconditioners allow you to keep the air at a certain temperature when the temperatureoutside is different. One of air conditioners main purposes is to provide relieffrom the heat.
Inside an air conditioner, air is taken in through the air intake and becomesfiltered. The air then passes over a series of cooling pipes. Inside the pipescirculates some type of cold fluid that is usually between 4 and 10 °C.If the temperature needs to be below 0 °C, like in a freezer, cold brineis used. The air that passes over the pipes becomes cooler and less humid. A faninside the unit then pushes the air into the room.
The size of an air conditioner required for a given job is determined by calculatingthe cooling load, which is the amount of cooling that the machine will have toput out to "condition" the space. The cooling load depends upon thesize and shape of the space; the number and size of windows and their orientationtoward the sun; the areas of walls, ceilings, floors and the extent to which theyare insulated; local climatic conditions; the wattage of electrical equipmentpresent; and the number of people who normally occupy the space.
The BTU per hour rating is the basic measurement in the United States for airconditioning, and it is used to specify the capacity of an air conditioner. OneBritish thermal unit (BTU) equals the amount of heat needed to raise the temperatureof 1 pound of water from 59 °F to 60 °F (15 °C to 16 °C).An air conditioner with a capacity of 12,000 BTU per hour can remove enough heatfrom the air it is conditioning to raise 12,000 pounds (5,440 kilograms) of waterone degree Fahrenheit each hour. One BTU per hour is equal to 0293 watts.The cooling capacities of room air conditioners range from 1 to 10 kilowatts.
Ka Fung Kan -- 2001
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