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A counterflow, twin-tube heat exchanger is made by brazing

Introduction to Heat Transfer | 6th Edition | ISBN: 9780470501962 | Authors: Theodore L. Bergman ISBN: 9780470501962 111

Solution for problem 11.35 Chapter 11

Introduction to Heat Transfer | 6th Edition

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Introduction to Heat Transfer | 6th Edition | ISBN: 9780470501962 | Authors: Theodore L. Bergman

Introduction to Heat Transfer | 6th Edition

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Problem 11.35

A counterflow, twin-tube heat exchanger is made by brazing two circular nickel tubes, each 40 m long, together as shown below. Hot water flows through the smaller tube of 10-mm diameter and air at atmospheric pressure flows through the larger tube of 30- mm diameter. Both tubes have a wall thickness of 2 mm. The thermal contact conductance per unit length of the brazed joint is 100 W/m K. The mass flow rates of the water and air are 0.04 and 0.12 kg/s, respectively. The inlet temperatures of the water and air are 85 and 23C, respectively. Employ the NTU method to determine the outlet temperature of the air. Hint: Account for the effects of circumferential conduction in the walls of the tubes by treating them as extended surfaces.

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PY 205 Week 3 Notes Chapter 4 and 5 Newton’s Laws 1. Velocities don’t change unless a net force acts upon it (qualitative) 2. The acceleration of a body is directly proportional to the net force acted on it (quantitative) a. Fnet = (mass)(acceleration) 3. Forces occur between two objects – if A exerts a force on B then B exerts a negative force on A. a. Fnet = Fxi +Fyj + Fzk b. The sum of all the forces on x = ma(x) c. The sum of all the force on y = ma(y) Applications of Newton’s laws - Kinetic motion - sliding friction - The force acts opposite to the direction of the object’s velocity - Normal force = shows that the friction force is approximately proportional to the normal force – the

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Chapter 11, Problem 11.35 is Solved
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Textbook: Introduction to Heat Transfer
Edition: 6
Author: Theodore L. Bergman
ISBN: 9780470501962

Since the solution to 11.35 from 11 chapter was answered, more than 462 students have viewed the full step-by-step answer. This textbook survival guide was created for the textbook: Introduction to Heat Transfer, edition: 6. Introduction to Heat Transfer was written by and is associated to the ISBN: 9780470501962. The full step-by-step solution to problem: 11.35 from chapter: 11 was answered by , our top Engineering and Tech solution expert on 09/27/17, 04:59PM. The answer to “A counterflow, twin-tube heat exchanger is made by brazing two circular nickel tubes, each 40 m long, together as shown below. Hot water flows through the smaller tube of 10-mm diameter and air at atmospheric pressure flows through the larger tube of 30- mm diameter. Both tubes have a wall thickness of 2 mm. The thermal contact conductance per unit length of the brazed joint is 100 W/m K. The mass flow rates of the water and air are 0.04 and 0.12 kg/s, respectively. The inlet temperatures of the water and air are 85 and 23C, respectively. Employ the NTU method to determine the outlet temperature of the air. Hint: Account for the effects of circumferential conduction in the walls of the tubes by treating them as extended surfaces.” is broken down into a number of easy to follow steps, and 129 words. This full solution covers the following key subjects: . This expansive textbook survival guide covers 13 chapters, and 1422 solutions.

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A counterflow, twin-tube heat exchanger is made by brazing