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An electronic device, such as a power transistor mounted on a finned heat sink, can be modeled as a spatially isothermal object with internal heat generation
An electrical power transformer of diameter 230 mm and height 500 mm dissipates 1000 W. It is desired to maintain its surface temperature at 47°C
An electrically heated sample is maintained at a surface temperature of Ts = 500 K.
An electrically powered, ring-shaped radiant heating element is maintained at a temperature of Th = 3000 K and is used in a manufacturing process
An electronic circuit board dissipating 50 W is sandwiched between two ducted, forced-air-cooled heat sinks.
Consider limitations for which the array has N = 11 fins, in which case values of the fin thickness t = 0.182 mm and pitch S = 1.982 mm are obtained
An igloo is built in the shape of a hemisphere, with an inner radius of 1.8 m and walls of compacted snow that are 0.5 m thick
An experiment is conducted to determine the average mass transfer convection coefficient of a small droplet using a heater controlled to operate at a constant
An electronic device, in the form of a disk 20 mm in diameter, dissipates 100 W when mounted flush on a large aluminum alloy (2024) block
An experiment is designed to measure the partition coefficient, K, associated with the transfer of a pharmaceutical product through a polymer material.
An experimental nuclear core simulation apparatus consists of a long thin-walled metallic tube of diameter D and length L
An experimental arrangement for measuring the thermal conductivity of solid materials involves the use of two long rods that are equivalent in every respect
An experiment is devised to measure liquid flow and convective heat transfer rates in micro-scale channels
An engine oil cooler consists of a bundle of 25 smooth tubes, each of length L = 2.5 m and diameter D = 10 mm.
An object of irregular shape 1 m long maintained at a constant temperature of 100°C is suspended in an airstream having a free stream temperature of O°C
An interior wall of a cold furnace, initially at 0°C, is suddenly exposed to a radiant flux of 15 kW/m2 when the furnace is brought on line
An insurance company has hired you as a consultant to improve their understanding of burn injuries.
An industrial process involves evaporation of a thin water film from a contoured surface by heating it from below and forcing air across it
An egg, which for the purposes of this problem can be assumed to be a 5-cm-diameter sphere having the thermal properties of water
An aluminum cooling fin for a heat exchanger is situated parallel to an atmospheric pressure air stream. The fin is 0.075 m high, 0.005 m thick, and 0.45 m
An aluminum heat sink (k = 240 W/m · K) used to cool an array of electronic chips consists of a square channel of inner width w = 25 mm
An air heater for an industrial application consists of an insulated, concentric tube annulus, for which air flows through a thin-walled inner tube
An air heater may be fabricated by coiling Nichrome wire and passing air in cross flow over the wire. Consider a heater fabricated from wire of diameter
An electrical cable, experiencing a uniform volumetric generation q, is half buried in an insulating material while the upper surface is exposed to a convection
An array of electronic chips is mounted within a sealed rectangular enclosure, and cooling is implemented by attaching an aluminum heat sink (k = 180 W/m · K).