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Analysis and Design of Heat exchanger

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This Lab is a senior mechanical engineering lab report conducted at the university of akron. Analysis and design of a heat exchanger follow.
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    1 HEAT TRANSFER TESTING AND HEAT EXCHANGER DESIGN Faculty Advisor: Dr. Guo-Xiang Wang Teaching Assistant: Mr. Troy Snyder Written by: Spencer Fulmer Group Members: Pat D., Mitch, Adam G., Joe K.    2 10/1/2014 TABLE OF CONTENTS PART 1………………………………………………….………..…. 3 Test Facility……………………………………………………………….………………… 3 Experimental Procedure…………………………………………….………………….. 4 Analytical Background………………………………………………………………….. 7 Data Reduction……………………………………………………………………………..9   Validation……………………………………………………………………………………12   Conclusions………………………………………………………………………………..13   Appendix…………………………………………………………………….……… . …….. 13 PART 2………………………………………………………….…. 18 Design strategy and methodology……………………………….…………...… .18 Analytical Background……………………………………………………..………… 18 Implementation of strategy………………………………………………………….19   Description of Optimization…………………………………………………………. 21 Sample Calculations………………………………………….………………………..21   Conclusion and recommendations……………………………………………….. 23 Appendix……………………………………………………………………………………23  Technical Drawi ng………………………………………………………………………24      3  Test Facility: The heat transfer testing and heat transfer design lab took place in ASEC 1B. The setup, shown in figure 1, consists mainly of a duct in which air is forced through via a blower motor. The flow rate is an unknown constant value in which we can obtain from experimental data. In addition, seen in figure 2, vertical and inclined manometers are included to measure Static Pressure Drop and the Centerline Velocity Pressure. A throttle valve on the flow exit stack allows flow control from 10%-100% flow. The test section shown consists of an arrangement of 18 glass tubes as shown in figure 3. These tubes represent a staggered tube bank which is found in many heat exchangers. Finally, the heater allows for a thermocouple equipped copper rod to be heated to specific temperatures. The following section describes how we used this apparatus to obtain experimental data and design our own heat exchanger with.    4 Experimental Procedure: Pressure Measurements:    Fill all test section openings with the glass tubes provided.    With the throttle valve closed turn on the blower.    Open the throttle valve to 100% flow area.    Verify two or three velocity pressures listed in the table provide to you (Table 1).    Record the static pressure drop and the velocity pressure at the geometric centerline for the following flow areas: 100, 80, 60, 40, 30, 20, and 10 percent. Table-1 Above, shows the obtained manometer measurements. Temperature Measurements:    Turn on the computer. From the windows desktop, double click on the icon labeled “Wind Tunnel Temperature Acquisition.” This will load the program that can be used to acquire temperature data.    In the temperature acquisition program, set the number of samples per channel to 100, and the scan rate to 1000 scans/sec.    Open the throttle valve to 100% flow area.    After wind tunnel has run for a couple minutes (to allow for the wind tunnel entrance temperature to stabilize), begin data acquisition. This can be done by selecting the run icon, which looks like an arrow (left-hand corner of the computer screen.    Once data acquisition has begun, heat the copper rod in the heater until it reaches a temperature between 35    Remove the copper rod from the heater, and place it into the wind tunnel at position #3. (Remove the glass rod first.)
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