Temperature dehumidifier so that it's temperature is reduced to the extent required, this process is accomplished by heat transfer. Some commonly used terms related to refrigeration, including temperature, heat, heat, sensible heat, latent heat, pressure, evaporation and boiling, thermal conductivity, heat transfer coefficient, heat transfer coefficient, specific volume and density, humidity, dew point temperature. 
 Refrigeration is a mechanical method, a limited space from the heat out, so that it lower the temperature to the required level. The sensible heat transfer process is done. For some common terminology cooling briefly as follows: 
 1.1 Temperature 
 Temperature is used to indicate the extent of hot and cold substances, the extent of high and low temperature thermometer can be used to measure, such as glass thermometer, the liquid heated tube expansion, elevated surface, cooling contraction, the surface reduced the level of surface the extent that high and low temperature. Briefly described below that temperature several criteria. 
 a. Celsius temperature scale in the standard atmospheric pressure, the freezing point of water as 0 degrees, the boiling point as 100 degrees, 0 degrees and 100 degrees in the balance between the carved 100 cells, each cell is l degree, to sign ℃ said. 
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 b. Fahrenheit temperature scale in the standard atmospheric pressure, the freezing point of water as 32 degrees, while the boiling point as 212 degrees, 180 carved balanced between the two cells, each cell is l degree, the symbol oF said. 
 c. Kelvin temperature scale (also called absolute temperature scale) it based on the Celsius scale, the freezing point of water as 273.16 degrees, the boiling point of water as 373.16 degrees, in theory, all the molecules of a material to stop movement of the point as 0 degrees, the symbol K said. 
 Commonly used temperature scale is Celsius, Fahrenheit, Kelvin. 
 1.2 The level of heat that the body temperature of the material objects, the degree of molecular thermal motion of intense, high and low temperatures have also indicated that the energy level of the object, this energy is called heat. When the temperature is different when the two objects in contact, the two gradually become the same temperature, there was heat from the warmer objects to cooler objects in the transfer, this time the object of the release or absorption of energy as heat. Unit of heat commonly used are: 
 a. card in the standard atmospheric pressure, will l grams of water heating or cooling, the temperature increase or decrease when l ℃, the heat added or removed as l card, said the symbol cal. The unit is too small for cards, projects are often times use their 1000 kcal or calories to represent. A symbol kcal. 
 b. British thermal units in the standard atmospheric pressure, the 11b (pounds) (11b = 0.454kg) of water heating or cooling, the temperature increase or decrease Fahrenheit l oF, the heat added or removed as a British thermal unit , the symbol for the Btu. c. J 
 In the International System of Units, on heat units consistent with the work of the unit, expressed in joules. Joule is equivalent to using 1N (Newton) force, a total point of moving in the direction of the force lm (m) to the work done. Therefore, in the international system of units, the joule is the unit of work and energy, simplify the calculation using this unit, joules symbol J. Joule heat unit of statutory. 
 Conversion between the Joule and the card is: