U.S. Department of Energy. Fundamentals Handbook. Heat by U.S. Department of Energy

By U.S. Department of Energy

The Thermodynamics, warmth move, and Fluid circulate basics instruction manual was
developed to help nuclear facility working contractors offer operators, maintenance
personnel, and the technical employees with the mandatory basics education to make sure a uncomplicated realizing of the thermal sciences. The guide contains info on thermodynamics and the homes of fluids; the 3 modes of warmth move - conduction, convection, and radiation; and fluid stream, and the power relationships in fluid platforms. this data will offer team of workers with a origin for realizing the elemental operation of varied kinds of DOE nuclear facility fluid structures.

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Additional resources for U.S. Department of Energy. Fundamentals Handbook. Heat transfer

Sample text

The wall is covered with a layer of insulation 1 in. 8 Btu/hr-ft-°F. The temperature of the wall on the inside of the insulation is 600°F. The wall loses heat to the environment by convection on the surface of the insulation. The average value of the convection heat transfer coefficient on the insulation surface is 950 Btu/hr-ft2-°F. Compute the bulk temperature of the environment (Tb) if the outer surface of the insulation does not exceed 105°F. Rev. 0 Page 23 HT-02 CONVECTION HEAT TRANSFER Heat Transfer Solution: a.

The radiation configuration factor is usually found in a text book for the given situation. Once the configuration factor is obtained, the overall net heat flux can be determined. Radiant heat flux should only be included in a problem when it is greater than 20% of the problem. Example: Calculate the radiant heat between the floor (15 ft x 15 ft) of a furnace and the roof, if the two are located 10 ft apart. The floor and roof temperatures are 2000°F and 600°F, respectively. Assume that the floor and the roof have black surfaces.

The transfer of heat is usually accomplished by means of a device known as a heat exchanger. Common applications of heat exchangers in the nuclear field include boilers, fan coolers, cooling water heat exchangers, and condensers. The basic design of a heat exchanger normally has two fluids of different temperatures separated by some conducting medium. The most common design has one fluid flowing through metal tubes and the other fluid flowing around the tubes. On either side of the tube, heat is transferred by convection.

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