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The radiation heat gage shown in the diagram is made from constantan metal foil, which is coated black and is in the form of a circular disk of radius R
The proposed design for an anemometer to determine the velocity of an airstream in a wind tunnel is comprised of a thin metallic strip whose ends are supported
The rate at which water is lost because of evaporation from the surface of a body of water may be determined by measuring the surface recession rate.
The products of combustion from a burner are routed to an industrial application through a thin-walled metallic duct of diameter D; = I m and length L = 100 In.
The problem of heat losses from a fluid moving through a buried pipeline has received considerable attention.
The outer surface of a hollow sphere of radius r2 is subjected to a uniform heat flux q2. The inner surface at r1 is held at a constant temperature T 8.1.
The human eye contains aqueous humor, which separates the external cornea and the internal iris-lens structure
The inner surface of a plane wall is insulated while the outer surface is exposed to an airstream at T8. The wall is at a uniform temperature corresponding
The inner wall of a rocket motor combustion chamber receives 50,000 Btu/(h ft2) by radiation from a gas at 5000° F
The front door of a dishwasher of width 580 mm has a vertical air vent that is 500 mm in height with a20-mm spacing between the inner tub operating
The heat transfer rate per unit width (normal to the page) from a longitudinal section, x2 - x1, can be expressed as q'12 = h12 (x2 - xl)(Ts - T8)
The horizontal cross section of an industrial chimney is shown in the accompanying sketch. Flue gases maintain the interior surface of the chimney at 300°C
The flat roof on the refrigeration compartment of a food deli very truck is of length L = 5 m and width W = 2 m
The extent 10 which the tip condition affects the thermal performance of a fin depends on the fin geometry and thermal conductivity, as well as the convection
The exposed surface (x = 0) of a plane wall of thermal conductivity k is subjected to microwave radiation that causes volumetric heating to vary
The heat transfer coefficient for air flowing over a sphere is to be determined by observing the temperature-time history of a sphere fabricated from pure
The evaporator section of a refrigeration unit consists of thin-walled, 10-mm-diarneter tubes through which refrigerant passes at a temperature of - 18°C.
The human brain is especially sensitive to elevated temperatures. The cool blood in the veins leaving the face and neck and returning to the heart
The heat transfer rate due to free convection from a vertical surface, 1 m high and 0.6 m wide, to quiescent air that is 20 K colder than the surface is known
The energy transferred from the anterior chamber of the eye through the cornea varies considerably depending on whether a contact lens is worn
The elemental unit of an air heater consists of a long circular rod of diameter D, which is encapsulated by a finned sleeve
The diagonal of a long triangular bar is well insulated, while sides of equivalent length are maintained at uniform temperatures Ta and Tb.
If the plate is installed 2 m from the leading edge of a roof and flushes with the roof surface, what is the rate of convective heat loss?
The defroster of an automobile functions by discharging warm air on the inner surface of the windshield. To prevent condensation of water vapor on the surface
The condenser of a steam power plant contains N = 1000 brass tubes (kt = 110 W/m · K), each of inner and outer diameters, Di = 25 mm and Do = 28 mm.