Heat Transmission of Insulating Materials: Report of the Insulation Committee, Annual Meeting, 1922, Revised to 1924American society of refrigerating engineers, 1924 - 114 páginas |
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A. S. R. E. JOURNAL air spaces American Society asbestos B.t.u. per sq Biquard box method brick Bureau of Standards calculated calibration Calorie hour calorimeter cement cm.3 hour coefficient Cold Storage CONDUCTIVITY OF MATERIALS constantan convection copper cork corkboard couples curve Desvignes Diatomaceous earth economic thickness equation factor fluid ft.,lin.°F deg galvanometer given Gram Kg Groeber Grundhofer heat conductivity heat flow heat loss heat transfer heat transmission Hencky Ice and Refrigeration inch thickness insulating materials junction layers metal moisture Nusselt obtained paper Pennsylvania State College perature pipe covering plate Poensgen potentiometer radiation rate of heat Refrigerating Engineers resistance thermometers Sample solid square foot steam Surface Condensation surface resistance surface transmission T₁ Table temperature difference temperature gradient test box thermal conductivity thermocouples thermometer tion Trans transmission coefficient tube unit velocity wall wires
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Página 21 - ... free convection." At any rate the order of magnitude, of the results is right and up to 2700° K. there is no perceptible temperature coefficient to the value of B. SUMMARY AND CONCLUSIONS. It has been shown that: 1. The loss of heat from wires by free convection takes place exactly as if there were a film of stationary gas around the wire, through which the heat is carried entirely by conduction. 2. The thickness of the film is independent of the temperature of the wire, but probably increases...
Página 69 - Specific Gravity is the ratio of weight of a given volume of material to the weight of an equal volume of water. In this method both weights are corrected to weight in vacuum, and the standard reference temperature for both material and water is 60°F.
Página 97 - PAULDING, CP Practical Laws and Data on the Condensation of Steam in Covered and Bare Pipes; to which is added a translation of Peclet's "Theory and Experiments on the Transmission of Heat Through Insulating Materials.
Página 38 - ... board, 11 in. square, so that the winding is distributed uniformly over the entire surface. It is insulated with micanite sheets and placed between two 1/16 in. copper plates which are then held together tightly by means of a number of copper screws passing through holes in the fibre board. Each plate has a 3/32 in. saw-cut isolating an 8 in. square in the center, as shown in the figure. This arrangement tends to minimize the heat conduction between the center square and the outer or guard ring....
Página 111 - Investigation of Warm Air Furnaces and Heating Systems. BulL 120, Univ. of 111. Eng. Exp. Sta., 1921. Abs. Am. Arch., Jan. 19, 1921, p. 78. Fire Resistance of Building Columns. Report of Underwriters' Laboratories, Chicago, 1921. Tech. Paper 184, United States Bureau of Standards. Eng. News-Rec., July 21, and 28, 1921. Review by RE Wilson. Abs. Concrete, June, 1921, p. 267. Elaborate series of fire tests on full-size building columns carried out jointly by Associated Factory Mutual Insurance Companies,...
Página 113 - An outline of the theory of heat transmission and absorption in application to ordinary engineering problems iwith discussion). (In: Engineers' Society of Western Pennsylvania.
Página 26 - Thus, the reduction of the value of the modulus between the melting point of ice and the boiling point of water is...
Página 21 - B being a constant for any gas, b diameter of film of gas, a diameter of 5. The rate of convection of heat from any wire is equal to the product of two factors, one the shape factor s involving only the diameter of the wire and the constant B (for any gas); and the other, a function <p of the heat conductivity of the gas. Thus if W is the energy loss from wire in watts per cm., then W = where s may be found from the equation s -;-- = a and r \dT.
Página 98 - Investigation of the Thermal Conductivity of Concrete and Embedded Steel; and the Effect of Heat Upon Their Strength and Elastic Properties. Paper read before Am. Soc. for Testing Materials, Atlantic City, NJ, June 21, 1907. Engineering News, vol. 58, no. 7, August 15, 1907, pp. 166-168. Furnace temperature 1,500
Página 98 - LP, <A study of 400 steaming tests made at the fuel-testing plant, St. Louis, Mo., in 1904, 1905, and 1906: US Geol.