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A silicon chip of thickness L = 2.5 mm and thermal conductivity ks = 135 W/m · K is cooled by boiling a saturated fluorocarbon liquid (Tsat = 57°C)
A shell-and-tube heat exchanger consisting of one shell pass and two tube passes is used to transfer heat from an ethylene glycol-water solution
A shell-and-tube exchanger (two shells, four tube passes) is used to heat 10,000 kg/h of pressurized water from 35 to 120°C with 5000 kg/h pressurized
A single-pass, cross-flow heat exchanger with both fluids unmixed is being used to heat water (mc = 2 kg/s. cp = 4200 J/kg · K) from 20°C to 100°C
A single-pass, cross-flow heat exchanger uses hot exhaust gases (mixed) to heat water (unmixed) from 30 to 80°C at a rate of 3 kg/s.
A shell-and-tube heat exchanger with single shell and tube passes (Figure) is used to cool the oil of a large marine engine
A shell-and-tube heat exchanger is to heat an acidic liquid that flows in un-finned tubes of inside and outside diameters Di = 10 mm and Do = 11 mm
A shell-and-tube heat exchanger consists of 135 thin-walled tubes in a double-pass arrangement, each of 12.5-mm diameters with a total surface area of 47.5 m2
A procedure for measuring the thermal conductivity of solids at elevated temperatures involves placement of a sample at the bottom of a large furnace.
A refrigeration truck is traveling at 80 mph on a desert highway where the air temperature is 50°C. The body of the truck may be idealized as a rectangular box
A probe of overall length L = 200 mm and diameter D = 12.5 mm is inserted through a duct wall such that a portion of its length, referred to as the immersion
A radiant heater, which is used for surface treatment processes, consists of a long cylindrical heating element of diameter D1 = 0.005 m and emissivity e1 = 0.8
A radiation detector has an aperture of area Ad = 10-6 m2 and is positioned at a distance of r = 1 m from a surface of area A, = 10-4 m2.
A row of regularly spaced, cylindrical heating elements (1) is used to cure a surface coating that is applied to a large panel (2) positioned below the elements
A re-cooperator is a heat exchanger that heats air used in a combustion process by extracting energy from the products of combustion.
A radioactive sample is to be stored in a protective box with 4 cm thick walls having interior dimensions 4 by 4 by 12 cm
A radiative heater consists of a bank of ceramic tubes with internal heating elements. The tubes are of diameter D = 20 mm and are separated by a distance
A rewritable optical disc (DVD) is formed by sandwiching a 15-nm-thick binary compound storage material between two I-mm-thick polycarbonate sheets
A rod of 10-mm diameter and 250-mm length has one end maintained at 100°C. The surface of the rod experiences free convection with the ambient air
A salesman for insulation material claims that insulating exposed steam pipes in the basement of a large hotel will be cost effective
A radioactive material of thermal conductivity k is cast as a solid sphere of radius ro and placed in a liquid bath for which the temperature T8 and convection
A process fluid having a specific heat of 3500 J/kg · K and flowing at 2 kg/s is to be cooled from 80°C to 50°C with chilled water, which is supplied
A quartz window of thickness L serves as a viewing port in a furnace used for annealing steel. The inner surface (x = 0) of the window is irradiated
A procedure for determining the thermal conductivity of a solid material involves embedding a thermocouple in a thick slab of the solid and measuring
A one-dimensional slab of thickness 2L is initially at a uniform temperature Ti. Suddenly, electric current is passed through the slab