40°C water with hwater = 800 W/m² K is flowing in a Pyrex tube. The inner and outerdiameters of the tube are 25 mm and 35 mm. A thin metallic heater element bondedto the outer surface of the tube is being used to heat the water by transferring600 W/m of thermal energy to the water flowing in the tube. The Pyrex tube andheater are covered with a 10-mm thick layer of foam insulation. The outer surface ofthe foam insulation is exposed to air at T = -5°C with hair = 12 W/m².K. The heater=airelement must generate more than 600 W/m, because part of the heat being generated islost to the air surrounding the foam insulation. Assume kp = 1.30 W/m K for Pyrexand k = 0.026 W/m K for the foam insulation.a) Find the temperature of the heater element needed to transfer 600 W/m of thermalenergy to the water in the tube.b) Find the total rate at which the heater element must generate thermal energy.WaterPyrex tube, kp = 1.30 W/m.K= 40°Cwaterhwater = 800 W/m².KHeater elementTair= -5°C= 12 W/m².KhairFoam insulation, k = 0.026 W/m.K

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water diameters of the tube are 25 mm and 35 mm. A thin metallic heater to the outer surface of the tube is being used to heat the water by tran 600 W/m of thermal energy to the water flowing in the tube. The Pyr heater are covered with a 10-mm thick layer of foam insulation. The the foam insulation is exposed to air at Tair = -5°C with hair = 12 W/m element must generate more than 600 W/m, because part of the heat lost to the air surrounding the foam insulation. Assume kp = 1.30 W/r and k = 0.026 W/m K for the foam insulation. a) Find the temperature of the heater element needed to transfer 600 energy to the water in the tube. b) Find the total rate at which the heater element must generate the

water diameters of the tube are 25 mm and 35 mm. A thin metallic heater to the outer surface of the tube is being used to heat the water by tran 600 W/m of thermal energy to the water flowing in the tube. The Pyr heater are covered with a 10-mm thick layer of foam insulation. The the foam insulation is exposed to air at Tair = -5°C with hair = 12 W/m element must generate more than 600 W/m, because part of the heat lost to the air surrounding the foam insulation. Assume kp = 1.30 W/r and k = 0.026 W/m K for the foam insulation. a) Find the temperature of the heater element needed to transfer 600 energy to the water in the tube. b) Find the total rate at which the heater element must generate the

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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