EKC 394 Chemical Engineering Laboratory II: Coil Heat Exchanger Experiment
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EKC 394 Chemical Engineering Laboratory II: Coil Heat Exchanger Experiment

This quiz covers the objectives and introduction of the Coil Heat Exchanger experiment in the Chemical Engineering Laboratory II course at Universiti Sains Malaysia. It includes topics such as determining individual film coefficients, overall heat transfer coefficient, and the effects of water flow rate and temperature on heat transfer.

Created by
@IngeniousFairy

Questions and Answers

What is the main objective of determining the individual film coefficients hi and ho and overall heat transfer coefficient Uo?

To measure the heat transfer efficiency of the coil heat exchanger

How does the crisscross or helical pattern in the coil heat exchangers contribute to their efficiency?

It creates a swift uniform heating of fluids increasing the total heat transfer coefficient

In what way does the design of corrugated tubes contribute to the efficiency of coil heat exchangers?

It produces a turbulent flow where the desired feature of fluctuating velocities is achieved

What is the purpose of having a large number of closely packed tubes in coil heat exchangers?

<p>To increase the total heat transfer coefficient</p> Signup and view all the answers

How does the connection locations and angle of entry contribute to the efficiency of coil heat exchangers?

<p>They reduce deposit buildup by performing a 'scoop and lift' action</p> Signup and view all the answers

What is the purpose of using circular layers of helically corrugated tubes inside coil heat exchangers?

<p>To produce a significant heat transfer surface within a light compact shell</p> Signup and view all the answers

What is the purpose of determining the individual film coefficients hi and ho?

<p>To analyze the efficiency of the overall heat transfer</p> Signup and view all the answers

How does the Dittus-Boelter equation contribute to the determination of heat transfer coefficient?

<p>By relating Nusselt number to Reynolds and Prandtl numbers</p> Signup and view all the answers

What is the significance of checking that the flow is turbulent before using the Dittus-Boelter equation?

<p>To verify that the flow conditions satisfy the equation's assumptions</p> Signup and view all the answers

How does adjusting valve V4 or V5 impact the hot water flow rate?

<p>It increases the hot water flow rate</p> Signup and view all the answers

Why is it necessary to repeat the experiments for different cold water flow rates?

<p>To observe how cold water flow rate affects heat transfer efficiency</p> Signup and view all the answers

What does 'Allow the temperature to reach steady state' help in achieving during the experiment?

<p>Minimization of temperature fluctuations for precise data collection</p> Signup and view all the answers

How does estimating Uo from the actual rate of heat transferred to cold water contribute to the experimentation process?

<p>It provides a measure of overall energy efficiency in heat transfer</p> Signup and view all the answers

What is the role of reading and recording temperatures TC1, TC2, TH1, and TH2 every 10 minutes until they reach steady state?

<p>To monitor and analyze temperature changes during steady state conditions</p> Signup and view all the answers

What is the purpose of filling the cold and hot tanks with water at the beginning of the procedure?

<p>To create an isolated system for accurate heat transfer measurements</p> Signup and view all the answers

How does estimating shell side film coefficient ho contribute to understanding heat exchanger performance?

<p>It allows comparison with theoretical values to assess heat exchanger effectiveness</p> Signup and view all the answers

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