examII_w2005_soln

# examII_w2005_soln - Name MAE 4800 Exam II Open notes Open...

This preview shows pages 1–3. Sign up to view the full content.

Name:_____________________________________ MAE 4800 Exam II May 13, 2005 Open notes Open book Closed neighbors Open mind Notes: Start exam when instructed – you will be given 120 minutes to complete the exam Write name at top of each page and any additional pages Read each problem carefully – if you still do not understand, ask Clearly state all assumptions Clearly show all your work, commenting on what you are doing – keep in mind that your exam communicates to those who are grading what you know To maximize points, plug in numbers at the end – solve algebraically first Reference table you are using for properties Good luck! MAE 4800, Winter 2005 5/13/05

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Name:_____________________________________ Problem 1 (50 points) A factorial study was conducted on a TE module, such as the one in Figure 1, to determine if the load resistance or the temperature difference across the TE is the most dominant parameter influencing the generated power. A simple, 2 factor study was conducted based on the experiment design shown in Table 1 below. The load power for each design point was calculated by averaging 4 replications. Each replication was found from a measurement of the voltage across the load resistor, R L , and a measurement of the load resistance (P L = V 2 /R L ). The nominal values for the voltage and resistance are also shown in the table. The standard deviations (s) for single voltage and resistance measurements are shown in Table 2. R L Figure 1. Sketch of TE Module Attached to a Load Resistor, R L Table 1. Factorial Experiment Design R L T P L [W] V [volts] R L [ ] + + 0.192 0.64 2.1 + - 0.021 0.21 2.1 - + 0.256 0.43 0.7 - - 0.028 0.14 0.7 Table 2. Measurement Standard Deviations for Single Replicate Measurements Measurement Standard Deviation Voltage 0.01 V Resistance 0.1 Ohms Determine which parameter, the load resistance or the temperature difference, is the most dominant factor.
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern