2. Exhaust gases at 1 atm and 300°C are used to preheat water in an industrial facility by passing them over a bank of tubes through which water is flowing at a rate of 6 kg/s. The mean tube wall temperature is 80°C. Exhaust gases approach the tube bank in normal direction at 4.5 m/s. The outer diameter of the tubes is 2.1 cm, and the tubes are arranged in-line with longitudinal and transverse pitches of SL =ST= 8 cm. There are 16 rows in the flow direction with eight tubes in each row. Using the properties of air for exhaust gases, determine (a) the rate of heat transfer per unit length of tubes, the temperature rise of water flowing through the tubes per unit length of tubes.
2. Exhaust gases at 1 atm and 300°C are used to preheat water in an industrial facility by passing them over a bank of tubes through which water is flowing at a rate of 6 kg/s. The mean tube wall temperature is 80°C. Exhaust gases approach the tube bank in normal direction at 4.5 m/s. The outer diameter of the tubes is 2.1 cm, and the tubes are arranged in-line with longitudinal and transverse pitches of SL =ST= 8 cm. There are 16 rows in the flow direction with eight tubes in each row. Using the properties of air for exhaust gases, determine (a) the rate of heat transfer per unit length of tubes, the temperature rise of water flowing through the tubes per unit length of tubes.
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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Transcribed Image Text:2. Exhaust gases at 1 atm and 300°C are used to preheat water in
an industrial facility by passing them over a bank of tubes
through which water is flowing at a rate of 6 kg/s. The mean
tube wall temperature is 80°C. Exhaust gases approach the tube
bank in normal direction at 4.5 m/s. The outer diameter of the
tubes is 2.1 cm, and the tubes are arranged in-line with
longitudinal and transverse pitches of SL =ST = 8 cm. There are
16 rows in the flow direction with eight tubes in each row. Using
the properties of air for exhaust gases, determine (a) the rate of
heat transfer per unit length of tubes, the temperature rise of
water flowing through the tubes per unit length of tubes.
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