Tuesday, August 26, 2014

The room temperature

Temperature is the intensity of heat or heat limit temperature of an object does not measure the amount of heat in an object, the temperature just shows how hot or how cold an object. Temperature measuring devices called thermometers temperature scales are the most popular scale thermometer in Celsius is the metric system, also called the centigrade scale. In the system of British / English units of temperature using Fahrenheit, while at Shittim kelvin SI metric units are used. Padjavascript: void (0) a temperature scale Celsius and Fahrenheit the following will be explained and connected with the ice melting temperature and the boiling point of water.
- Celsius
On the Celsius scale ice melting point or freezing point of water is 00C. 1000C boiling point of water is one hundred spaces or levels of scale between the freezing point and boiling point of water on the Celsius thermometer.
- Fahrenheit
On the Fahrenheit thermometer the freezing point of water and the melting point of water is 320F, Boiling water is 2120f. Number of heat units as previously described that the thermometer only measures the intensity of heat is not the amount of heat, however, in dealing with the heat needs to know also satua-unit amount of heat.
Some units of the amount of heat that is often used is:
Using metric-system units calorie (cal) or kilocalori (kcal) calorie (cal).
the amount of heat needed / disposed to raise / lower the temperature of water by 1gram! C is 1 cal. Kilocalorie (kcal): The amount of heat required / disposed to raise / lower the water temperature of as much as 1 kg, at 1 C is 1 kcal.
SI metric-system using the unit joule (J) or kilojoules (KJ) kilojoules
The amount of heat required / disposed to raise or lower the water temperature of as much as 1 kg, by 1 ° C is 4.186 kj.
English-system using force British Thermal Units (BTU) British Thermal Unit (BTU)
  The amount of heat needed to raise and lower the temperature of 1 lb of water by 1 oF is 1 BTU. Note the name plate in the indoor air-conditioning usually contained more information specifik example: AC brands ANU (though not promotional) listed capacity AC 5000 BTU / H usually people refer to half PK.AC AC 7000 BTU / H (AC 3/4 PK) her ... etc., the greater the amount of BTU the faster cold temperatures achieved, need to be adjusted to the size of the room.

How to calculate how many PK we need to get the room cool air. The formula: (length x width) X 450 fpm (feet per minute) divided by 9000 BTU Example question: spacious 9 m X 450: 9000 = 0.45 (4500 BTU) so for the size of the room with an area of ​​9 meters using AC half PK
* U / * standard room conditions when there are a variety of electronic devices and the AC power then it must be even more so its BTU room air conditioning cycle can be maintained, because of the things they will produce heat load (Saudi Arabia Kalee) can also calculation wearing length x Width x (Height / 3) x 0.07 eg: 3 x 3 x (2.5 / 3) x 0:07 = 0.525 (5250 BTU) 5000 BTU rounding, nor half PK.

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