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A cross-flow heat exchanger used in a cardiopulmonary

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

Solution for problem 11.39 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 11.39

A cross-flow heat exchanger used in a cardiopulmonary bypass procedure cools blood flowing at 5 L/min from a body temperature of 37C to 25C in order to induce body hypothermia, which reduces metabolic and oxygen requirements. The coolant is ice water at 0C, and its flow rate is adjusted to provide an outlet temperature of 15C. The heat exchanger operates with both fluids unmixed, and the overall heat transfer coefficient is 750 W/m2 K. The density and specific heat of the blood are 1050 kg/m3 and 3740 J/kg K, respectively. (a) Determine the heat transfer rate for the exchanger. (b) Calculate the water flow rate. (c) What is the surface area of the heat exchanger? (d) Calculate and plot the blood and water outlet temperatures as a function of the water flow rate for the range 2 to 4 L/min, assuming all other parameters remain unchanged. Comment on how the changes in the outlet temperatures are affected by changes in the water flow rate. Explain this behavior and why it is an advantage for this application.

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Chapter 11, Problem 11.39 is Solved
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Textbook: Introduction to Heat Transfer
Edition: 6
Author: Theodore L. Bergman
ISBN: 9780470501962

The answer to “A cross-flow heat exchanger used in a cardiopulmonary bypass procedure cools blood flowing at 5 L/min from a body temperature of 37C to 25C in order to induce body hypothermia, which reduces metabolic and oxygen requirements. The coolant is ice water at 0C, and its flow rate is adjusted to provide an outlet temperature of 15C. The heat exchanger operates with both fluids unmixed, and the overall heat transfer coefficient is 750 W/m2 K. The density and specific heat of the blood are 1050 kg/m3 and 3740 J/kg K, respectively. (a) Determine the heat transfer rate for the exchanger. (b) Calculate the water flow rate. (c) What is the surface area of the heat exchanger? (d) Calculate and plot the blood and water outlet temperatures as a function of the water flow rate for the range 2 to 4 L/min, assuming all other parameters remain unchanged. Comment on how the changes in the outlet temperatures are affected by changes in the water flow rate. Explain this behavior and why it is an advantage for this application.” is broken down into a number of easy to follow steps, and 176 words. Introduction to Heat Transfer was written by and is associated to the ISBN: 9780470501962. This full solution covers the following key subjects: . This expansive textbook survival guide covers 13 chapters, and 1422 solutions. This textbook survival guide was created for the textbook: Introduction to Heat Transfer, edition: 6. The full step-by-step solution to problem: 11.39 from chapter: 11 was answered by , our top Engineering and Tech solution expert on 09/27/17, 04:59PM. Since the solution to 11.39 from 11 chapter was answered, more than 707 students have viewed the full step-by-step answer.

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