Layout of the Course "Heat Transfer

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Cooling Load Estimation for a Multi-story office building Thesis

صورة
eat Gain through Glass Heat is transmitted through glass due to solar radiation. The heat gain through glass areas constitutes a major portion of the load on the cooling apparatus. This could be direct in the form of sunrays or diffused radiation due to reflection from other objects outside. Heat transmitted through a glass depends on the wavelength of radiation and physical and chemical characteristics of glass. Part of the radiation is absorbed, part is reflected and the rest is transmitted. The heat transfer of glass takes place in the two ways, transmission heat gain and solar heat gain. The following equations are used to calculate heat gain from glass areas. Fig 3.4 heat gain through glass Transmission heat gain through glass: Q =UA(CLTD) corr …………... (3.4) By solar radiation: Q = A´SHGF ´SC´CLF max ………………….(3.5) SHGF max = maximum solar heat gain factor (W/m2) SC = shading coefficient depends on type of shading CLF = cooling load factor   ...
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Heat exchanger design

صورة
Calculations for heat exchanger designs use heat transfer parameters such as convection heat transfer coefficients, overall heat transfer coefficients, and log mean temperature differences. These calculations are needed for shell and tube and double pipe heat exchangers, as well as other types. Types of Industrial Heat Exchangers There are many types of heat exchangers used in a wide variety of industrial applications including power plants, boilers for industrial steam, chemical plants, and many types of manufacturing facilities. Several different configurations are used to accomplish the basic function of transferring heat from one fluid to another without mixing the two fluids together. The types of heat exchangers described and discussed in these articles include the two most common industrial heat exchangers, the shell and tube heat exchanger and the double pipe heat exchanger, along with information about spiral heat exchangers, flat plate heat exchangers, fin-tube heat excha...
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Conversion factor

A conversion factor is the number or formula you need to convert a measurement in one set of units to the same measurement in another set of units. The number is usually given as a numerical ratio or fraction that can be used as a multiplication factor. For example, say you have a length that is measured in feet and you wish to report on it in meters. If you know that there are 3.048 feet in a meter, then you can use that as a conversion factor to determine what the same distance is in meters.  One foot is 12 inches long, and the conversion factor of 1 foot to inches is 12. In yards, 1 foot is equal to 1/3 yard (conversion factor of 1 foot to yards is 1/3) so forth. The same length is 0.3048 meters, and it is also 30.48 centimeters. To convert 10 feet to inches, multiply 10 times 12 (the conversion factor) = 120 inches To convert 10 feet to yards, multiply 10 x 1/3 = 3.3333 yards (or 3 1/3 yards) To convert 10 feet to meters, multiply 10 x .3048 = 3.048 met...
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