Heat transfer distilleries in ireland speeds can be determined by Newton

Since time immemorial man has been doing hot food preservation. Drying, salting and fermentation usually they lalkukan when excessive food and used for food when fresh is not available. Since ancient times, distilleries in ireland humans have made use of fire to cook hot food.
The process of heat transfer is a stream flow of a substance is not weighted and can not be seen, called caloric, which arises when a substance is burned, and moving from the area's many kaloriknya (high temperature) to the less kaloriknya (lower temperature). If the energy transfer occurs solely due to differences in temperature, such events distilleries in ireland are called convection. Like the example of a Bunsen burner flame on a system consisting of water and water vapor at lower temperatures. (Wirakartakusumah, 1992).
The purpose of the experiment was to determine the heat transfer process of heat transfer from a material with a high temperature to low temperature kebahan food. Either by conduction, convection, and radiation.
The principle of the experiment is based on conduction heat transfer is a heat transfer process that occurs without displacement moleku-molecule objects. Convection heat transfer is heat transfer material that accompanied the movement distilleries in ireland of molecules that move as a result of encouragement. And radiation heat transfer is based on the heat transfer process that occurs due to the emission in the form of magnetic waves.
Benefits of the experiment was to determine the heat transfer process in the form of heat transfer and heat removal from the material to change the physical, chemical and storage characteristics of these materials. Heating process, heat transfer in foodstuffs intended to eliminate or reduce unwanted biological activity, such as enzime or microbial distilleries in ireland activity.
Heat transfer is an important unit operation in the food industry, since nearly every treatment processes requiring heat transfer in the form of giving and taking heat from the material to change the physical, chemical distilleries in ireland and penyimpaan characteristics of these materials. Heating process in the processing and preservation of food intended to eliminate or reduce distilleries in ireland unwanted biological activity, such as enzymes and microbial activity. During the process, the damage also occurred simultaneously nutrition and the factors that determine the quality of foodstuffs, such as color, taste and texture. distilleries in ireland With dimengerrtinya the principles of physics and heat transfer properties of materials pangandan known microbes, so we can determine the optimum conditions in terms of heat transfer and can make optimization for destroying microbes and maintain nutrition and food quality distilleries in ireland factors (Wirakartakusumah, 1992).
Conduction is heat transfer process occurring distilleries in ireland or heat propagates from one molecule to another molecule, without transfer of the molecules of objects. Heat conduction can only occur within an object if there are parts of the object distilleries in ireland is at a temperature that is not the same, and the direction of flow is always from the point of higher temperature to a point where the temperature is lower (Zemansky, 1982).
The legal basis for the transfer of heat by conduction revealed by Fourier. The sound of Fourier's Law states that the speed of heat transfer through a uniform material is directly proportional to the surface area, changes distilleries in ireland in temperature and inversely proportional to the thickness of the material (Wirakartakusumah, 1992).
The term is used for the convection heat transfer from one place to another distilleries in ireland due to the displacement of the material itself. Hot air furnace and hot water heating systems are two examples. If the material is heated with a forced move blower or pump, the process is called forced convection if the material flow due to density differences, the process is called natural convection or free convection (Fellows, 1990).
Heat transfer distilleries in ireland speeds can be determined by Newton's law which states that the rate of heat transfer by convection is directly proportional to the surface area and the temperature distilleries in ireland difference between the hot fluid to the cold part (Wirakartakusumah, 1992).
The mechanism of radiation is the energy transferred in the form of electromagnetic waves emitted by a material and absorbed by the other ingredients. Electromagnetic waves travel at the speed equal to the speed of light and has the characteristics of waves and penjang same frequency (Wirakartakusumah, 1992).
Blanching or blansir is a common heat treatment distilleries in ireland performed on the food prior to freezing, drying or canning. The purpose of the process depends blansir will do next. The purpose blansir before drying and freezing process is to inactivate the enzyme. If the product is not frozen distilleries in ireland beforehand and immediately dried,