Bundle: Automotive Technology: A Systems Approach, 6th + MindTap Auto Trades, 4 terms (24 months) Printed Access Card
Bundle: Automotive Technology: A Systems Approach, 6th + MindTap Auto Trades, 4 terms (24 months) Printed Access Card
6th Edition
ISBN: 9781305361454
Author: Jack Erjavec, Rob Thompson
Publisher: Cengage Learning
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Chapter 22, Problem 8RQ
To determine

The use of transistor in automotive electronics.

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A steam pipe is covered with two layers of insulation. The inner layer (k = 0.17 W/m-K) is 30 mm thick and outer layer (k = 0.023 W/m-K) is 50 mm thick. The pipe is made of steel (k = 58 W/m-K) and has inner diameter and outer diameter of 160 and 170 mm, respectively. The temperature of saturated steam is 300 °C and the ambient air is at 50 °C. If the inside and outside heat transfer coefficients are 30 W/m²K and 5.8 W/m²-K respectively, calculate the rate of heat loss per unit length of the pipe.
An aluminium pipe carries steam at 110 °C. The pipe (k 185 W/m °C) has an inner diameter of 100 mm and an outer diameter of 120 mm. the pipe is located in a room where the ambient air temperature is 30 °C and the convective heat transfer coefficient between the pipe and air is 15 W/m2°C. .2.1) Neglecting the convective resistance of the steam, determine the heat transfer rate per unit length of pipe. hs o 1101 2.2) To reduce the heat loss from the pipe, it is covered with a 50 mm thick layer of insulation (k 0.20 W/m C). Determine the heat transfer rate per unit length from the insulated pipe. Assume negligible convective resistance from the steam
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