CHG 2314 Midterm: CHG 2314 MidtermSummer03
31 Jan 2019
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Do any 2 problems; the exam will be marked out of 20. A thin-wall spherical stainless steel vessel has a diameter of 50 cm and contains reactants, which maintain the vessel surface at 90oc. To decrease heat losses and to prevent workers from being burnt by accidental contact with the vessel, it is proposed to insulate the vessel. Also calculate the rate of heat loss from the insulated vessel. The outside heat transfer coefficient between the spherical vessel and the air depends on the diameter of the vessel, ho = bd-1, where b is a constant and. D is the outer diameter (in meters) of the insulated vessel. A nuclear fuel element of thickness 2l is covered with steel cladding of thickness b. Express your results in terms of oq , l, b, kf, ks, t , h: sketch the temperature distribution t(x) for the entire system.
