following assumptions, estimate the necessary volume of the water bath. supplied to the water bath; that is, it is allowed to cool off during the • The initial temperature of the water bath is 50°C and no more heat is 4.13 You work for a surgeon who asks you to design a heat-exchanging device to continuously warm 5.0 L/min of blood from 4°C to 37°C by transferring heat from warm water. (a) Assuming that the specific heat capacity of blood is constant at 1.0 cal/(g* and its density is also constant at 1.0 g/mL, estimate the required rate heat transfer in cal/min. (b) A physician suggested that the blood could be warmed by simply immers ing coils of tubing carrying the blood in a large water bath. Using the following assumptions, estimate the necessary volume of the water ba • The initial temperature of the water bath is 50°C and no more hear supplied to the water bath; that is, it is allowed to cool off during the of ods bod Som anid surgery. d The surgery lasts 3 hours.
following assumptions, estimate the necessary volume of the water bath. supplied to the water bath; that is, it is allowed to cool off during the • The initial temperature of the water bath is 50°C and no more heat is 4.13 You work for a surgeon who asks you to design a heat-exchanging device to continuously warm 5.0 L/min of blood from 4°C to 37°C by transferring heat from warm water. (a) Assuming that the specific heat capacity of blood is constant at 1.0 cal/(g* and its density is also constant at 1.0 g/mL, estimate the required rate heat transfer in cal/min. (b) A physician suggested that the blood could be warmed by simply immers ing coils of tubing carrying the blood in a large water bath. Using the following assumptions, estimate the necessary volume of the water ba • The initial temperature of the water bath is 50°C and no more hear supplied to the water bath; that is, it is allowed to cool off during the of ods bod Som anid surgery. d The surgery lasts 3 hours.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Question
Transcribed Image Text:(b) A physician suggested that the blood could be warmed by simply immers-
following assumptions, estimate the necessary volume of the water bath.
supplied to the water bath; that is, it is allowed to cool off during the
• The initial temperature of the water bath is 50°C and no more heat is
4.13 You work for a surgeon who asks you to design a heat-exchanging device to
continuously warm 5.0 L/min of blood from 4°C to 37°C by transferring heat
from warm water.
(a) Assuming that the specific heat capacity of blood is constant at 1.0 cal/(g• °C
and its density is also constant at 1.0 g/mL, estimate the required rate of
heat transfer in cal/min.
(b) A physician suggested that the blood could be warmed by simply immers
ing coils of tubing carrying the blood in a large water bath. Using the
following assumptions, estimate the necessary volume of the water batl.
• The initial temperature of the water bath is 50°C and no more hear
onwsupplied to the water bath; that is, it is allowed to cool off during
dmod
dmad
vbod
surgery.
The surgery lasts 3 hours.
Transcribed Image Text:Problems
295
• The final water temperature should not fall below 40°C in order to
maintain a proper temperature gradient for heat transfer.
• Heat transfer occurs only between the blood and the water; no heat is
exchanged with the environment.
(c) Is the design in part (b) practical? Make recommendations to improve it.
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