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Air is being heated with hot oil in banks. The tubes are made of an alloy with thermal conductivity (K = 310 W/mk). The hot oil is at a temperature of 125 degree Celsius and flows inside the tubes. The air flows on the outside. Air enters at 20 degrees Celsius with a mean velocity of 5.8 m/s and at 1 atm. The tubes are thin wall with a diameter of 2cm. The tubes are arranged in staggered arrangement with longitudinal transverse pitches of S₁ =ST= 5cm. There are 21 rows in the flow direction with 8 tubes per row. Assume an exit temperature of the air from the tube bank as 80 degrees Celsius and based on this, determine the following per unit length of the tubes. Note that you are not supposed to perform any iterations. Just perform calculations for the first iteration with starting temperature of 80 degrees Celsius. For this iteration compute: a) New exit temperature of air from the tube bank b) Rate of heat transfer per unit length of the tubes c) Pressure drop for air flow across the tubes

Air is being heated with hot oil in banks. The tubes are made of an alloy with thermal conductivity (K = 310 W/mk). The hot oil is at a temperature of 125 degree Celsius and flows inside the tubes. The air flows on the outside. Air enters at 20 degrees Celsius with a mean velocity of 5.8 m/s and at 1 atm. The tubes are thin wall with a diameter of 2cm. The tubes are arranged in staggered arrangement with longitudinal transverse pitches of S₁ =ST= 5cm. There are 21 rows in the flow direction with 8 tubes per row. Assume an exit temperature of the air from the tube bank as 80 degrees Celsius and based on this, determine the following per unit length of the tubes. Note that you are not supposed to perform any iterations. Just perform calculations for the first iteration with starting temperature of 80 degrees Celsius. For this iteration compute: a) New exit temperature of air from the tube bank b) Rate of heat transfer per unit length of the tubes c) Pressure drop for air flow across the tubes

Elements Of Electromagnetics
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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rows in the flow on this, determine the orm iterations. Just xit temperature of air. For Rate of heat transfer (Wim) Circle one below 1.2 x 105 9.8 x 10 9.6 x 10 1.0 x 10 Pressure drop (N/m2) Circle one below 464 674 2735 OC € 374 544 New exit temper (°C) Circle one bel 56 59 on 53 50
Transcribed Image Text:rows in the flow on this, determine the orm iterations. Just xit temperature of air. For Rate of heat transfer (Wim) Circle one below 1.2 x 105 9.8 x 10 9.6 x 10 1.0 x 10 Pressure drop (N/m2) Circle one below 464 674 2735 OC € 374 544 New exit temper (°C) Circle one bel 56 59 on 53 50
< 09:02 O LIVE ✓ Today 09:02 row. Air is being heated with hot oil in banks. The tubes are made of an alloy with thermal conductivity (K = 310 W/mk). The hot oil is at a temperature of 125 degree Celsius and flows inside the tubes. The air flows on the outside. Air enters at 20 degrees Celsius with a mean velocity of 5.8 m/s and at 1 atm. The tubes are thin wall with a diameter of 2cm. The tubes are arranged in staggered arrangement with longitudinal transverse pitches of S₁ =ST= 5cm. There are 21 rows in the flow direction with 8 tubes per Edit Assume an exit temperature of the air from the tube bank as 80 degrees Celsius and based on this, determine the following per unit length of the tubes. Note that you are not supposed to perform any iterations. Just perform calculations for the first iteration with starting temperature of 80 degrees Celsius. For this iteration compute: a) New exit temperature of air from the tube bank b) Rate of heat transfer per unit length of the tubes c) Pressure drop for air flow across the tubes (i) !!!!
Transcribed Image Text:< 09:02 O LIVE ✓ Today 09:02 row. Air is being heated with hot oil in banks. The tubes are made of an alloy with thermal conductivity (K = 310 W/mk). The hot oil is at a temperature of 125 degree Celsius and flows inside the tubes. The air flows on the outside. Air enters at 20 degrees Celsius with a mean velocity of 5.8 m/s and at 1 atm. The tubes are thin wall with a diameter of 2cm. The tubes are arranged in staggered arrangement with longitudinal transverse pitches of S₁ =ST= 5cm. There are 21 rows in the flow direction with 8 tubes per Edit Assume an exit temperature of the air from the tube bank as 80 degrees Celsius and based on this, determine the following per unit length of the tubes. Note that you are not supposed to perform any iterations. Just perform calculations for the first iteration with starting temperature of 80 degrees Celsius. For this iteration compute: a) New exit temperature of air from the tube bank b) Rate of heat transfer per unit length of the tubes c) Pressure drop for air flow across the tubes (i) !!!!
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