Conference Session

Focus on Entry Experiences in Chemical Engineering

Collection

2011 ASEE Annual Conference & Exposition

Authors

Brian J. Anderson, West Virginia University; Robin S. Hissam, West Virginia University; Joseph A. Shaeiwitz, West Virginia University; Richard Turton, West Virginia University

Tagged Divisions

Chemical Engineering

22.1127.4Equation 3 and the cost of electricity, which is 0.07/kWh. A year is assumed to be 8000 h,which allows for about one month of plant shut down for maintenance.The purchased cost of each compressor is given by: ( PC comp [$] = $15.9 W& [ W] 0.8 ) (5)The design equation for the heat exchanger is given by: Q[W ] = m& air [kg/s]C p,air [J/kg K](Tair ,in − Tair ,out ) = m& cw [kg/s]C p,cw [J/kg K](Tcw,out − Tcw,in ) = U [ W/m 2 K] A[m 2 ]FΔTlm

Conference Session

New Developments in Teaching Electromagnetics and Related Topics

Collection

2011 ASEE Annual Conference & Exposition

Authors

Robert H. Caverly, Villanova University

Tagged Divisions

Electrical and Computer

opportunity to further enhance student learning and engagement inthe area of system engineering, electronics and high frequency design and constructiontechniques. Some schools have used high frequency design classes from a theoreticalperspective but with a lower frequency project component to illustrate the timeless concepts.Other schools2-4 are using the latest PC-soundcard based software defined radio (SDR) kits andideas to illustrate receiver concepts as well as I/Q modulation schemes; PC software fromexternal sources are used to process the I/Q signals from the hardware SDR and so there is a fearthat some important concepts may be lost through the use of the ‘black box’ software. However,the hardware component is still invaluable for students to

Conference Session

Chemical Engineering in Silico

Collection

2011 ASEE Annual Conference & Exposition

Authors

Erick J. Nefcy, Oregon State University; Philip H. Harding, Oregon State University; Milo Koretsky, Oregon State University

Tagged Divisions

Chemical Engineering

Lab: Team A 1 R Co-current vs = 0 = q UA∆Tlm U Ri hi countercurrent R0  R0  1 v + ln   + kw  Ri  h0 Lab 1, Report Report Lab 2

Conference Session

Information Literacy: Theory and Practice

Collection

2011 ASEE Annual Conference & Exposition

Authors

Nasser Saleh, Queen's University

Tagged Divisions

Engineering Libraries

wereidentified as A1,B3, E4 .. etc.The response rate to the survey was 66% from 42 students representing the 20 project groups.The number of respondents who belong to the same project group varies as shown in Table 2.Table 1. Project assignment of the survey respondents Project# No. of respondents No. of groups Subtotal of respondents per project E 4 1 4 A, B, C, D, F, G 3 6 18 H, I, J, K, L, M, N 2 7 14 O, P, Q, R, S, T 1 6 6 Total

Conference Session

Factors Affecting Student Performance

Collection

2011 ASEE Annual Conference & Exposition

Authors

Muhammad Zafrul Hasan, Texas A&M University

Tagged Divisions

Engineering Technology

MISR Figure 3: RAM test using MISRLiner Feedback Shift Register (LFSR): It is often used to generate test patterns as well as tocompress test outputs into signatures. It has a serial input that is derived from the outputs ofsome stages by passing them through an X-OR gate as shown in Figure 4. The generated outputsare pseudo random in nature. LFSR can be used to build MISR as well. X-OR D Q D Q D Q CLOCK Page 22.456.5 Figure 4: A simple LFSRBuilt-in Logic

Conference Session

Capstone Design I

Collection

2011 ASEE Annual Conference & Exposition

Authors

Peter L Schmidt, University of North Carolina, Charlotte; Daniel Hoch, University of North Carolina, Charlotte; Nabila A. Bousaba, University of North Carolina, Charlotte; William F. Heybruck, University of North Carolina, Charlotte; Deborah L Sharer, University of North Carolina, Charlotte; Valentina Cecchi, University of North Carolina at Charlotte; Gary Teng, University of North Carolina at Charlotte; Elizabeth Sharer, Francis Marion University

Tagged Divisions

Design in Engineering Education

Page 22.198.15Public gen As IntegerPublic maxGen As IntegerPublic bestFV As DoublePublic bestFVIndex As IntegerPublic historyBestFV As DoublePublic historyBestFVIndex As IntegerPublic feasibilityArray() As DoublePublic x As DoublePublic y As IntegerPublic z As IntegerPublic t As IntegerPublic start As IntegerPublic finish As IntegerPublic feasibilityBestIndex As IntegerPublic feasibilityBestProjNum As IntegerPublic feasibilityBestWeight As IntegerPublic infeasibleIndex() As IntegerPublic infeasibleTemp() As IntegerPublic Sum As IntegerPublic infeasible As IntegerPublic q As IntegerPublic r As IntegerPublic Form As BooleanPublic sheetName As StringSub Main()'Student Assignment Problem'January 4, 2011

Conference Session

Impact of the Gulf Coast Oil Spill on Chemical Engineering Education & Misc.

Collection

2011 ASEE Annual Conference & Exposition

Authors

Michael A. Smith, Villanova University; Noelle K. Comolli, Villanova University

Tagged Divisions

Chemical Engineering

(U) are calculated in the usualmanner set forth in any standard heat transfer text, see for example Holman[3]. In addition, thetechnical evaluation of an immersion chiller in this application has been covered by Joye andSmith.[4] Q = mcool ⋅ Cp ⋅ (Tcw,out − Tcw,in ) = U ⋅ Aex ΔTLM [1]where Q is the heat transfer rate, mcool is the cooling water flow rate, Cp is water heat capacity,Tcw,out is the cooling water outlet temperature, Tcw,in is the cooling water inlet temperature, U isthe overall heat transfer coefficient based on Aex , the outside surface area of the cooling coils,and ΔT LM is the log-mean average temperature driving force. Students are asked to calculate Ufor each data set and plot

Conference Session

Assessment Methods and Learning Pedagogy II

Collection

2011 ASEE Annual Conference & Exposition

Authors

Jyhwen Wang, Texas A&M University; Alex Fang, Texas A&M University; Michael Ryan Golla, Texas A&M University

Tagged Divisions

Engineering Technology

otherquestions related to course contents and lecture delivery methods. The questions relevantto this study include:Q 1) I am a “learning by thinking” person (logic analysis). Page 22.1686.9Q 2) I am a “learning by feeling” person (personal involvement and/or past experience).Q 3) I am a “learning by doing” person (active experimentation and hands-on).Q 4) I am a “learning by watching and listening” person (observations).Q 5) I need to know the physical evidence and/or numbers that back up a concept. I pay attention to details in lab procedures and I am a quantitative person.Q 6) Knowing the big picture or concept is all I care about

Conference Session

Great Ideas for Projects that Teach Instrumentation

Collection

2011 ASEE Annual Conference & Exposition

Authors

El-Sayed Aziz, Stevens Institute of Technology; Zengqian Wang, Stevens Institute of Technology; Sven K. Esche, Stevens Institute of Technology; Constantin Chassapis, Stevens Institute of Technology

Tagged Divisions

Instrumentation

  / g 0 V02 q 10Here, Ps is the pressure on the spherical surface, P is the pressure at infinity,  is the density ofthe fluid, g0 is the gravitational constant, V0 is the air flow velocity of the wind tunnel and q isthe dynamic pressure. The difference between the high pressure in the front stagnation regionand the low pressure in the rear separated region causes a large drag contribution called pressuredrag. This is added to the integrated shear stress or friction drag of the body, which it oftenexceeds. The relative contributions of the friction drag and the pressure drag depend on thebody’s shape, especially its thickness

Conference Session

Computers and Software in Teaching Mathmatics

Collection

2011 ASEE Annual Conference & Exposition

Authors

Micah Stickel, University of Toronto

Tagged Divisions

Mathematics

) integrand=x.^3;Then using the following command, you can evaluate this definite integral as: >> Q=quadl(@myint,-2,6) Q = 320Which is the correct value, that can be verified by calculating: >> 6^4/4-(-2)^4/4 ans = 320Alternatively, we could use an inline function to define our integrand, such as: >> myint=inline('c*exp(j*pi*x)','x','c') myint = Inline function: myint(x,c) = c*exp(j*pi*x)In this case our integrand consists of two variables, c, and the variable of integration, x. To makesure the function quadl knows which variable is the variable of integration we would use the syntax: Q=quadl(@(x)myint(x,2),0,1) Q = 0.0000 + 1.2732iThis command evaluates the integral

Conference Session

NSF Grantees Poster Session

Collection

2011 ASEE Annual Conference & Exposition

Authors

James Boerio, University of Cincinnati; Dionysios D. Dionysiou, University of Cincinnati; Ian Papautsky, University of Cincinnati; Miguel Pelaez, University of Cincinnati; Mark Schulz; Christopher Huth; Vesselin N. Shanov, University of Cincinnati; Donglu Shi, University of Cincinnati

Tagged Topics

NSF Grantees

. Davis, K. A. Law, A. C. Barton, S. D. Collyer, S. P. J. Higson, and T. D. Gison,“Label-Free and Reversible Immunosensor Based Upon an AC Impedance InterrogationProtocol,” Analytica Chimica Acta, 537, 163-168 (2005).12. J. Wang, and M. Musameh, “Carbon Nanotube/Teflon Composite Electrochemical Sensorsand Biosensors.” Anal. Chem., 75, 2075-2079 (2003).13. Y. Tu, Y. Lin, and Z. F. Ren, “Nanoelectrode Arrays Based on Low Site Density AlignedCarbon Nanotube,” Nano Letters, 3, 107-109 (2003).14. J. Li, H. T. Ng, A. Cassell, W. Fan, H. Chen, Q. Ye, J. Koehne, J. Han, and M. Meyyappan,“Carbon Nanotube Nanoelectrode Array for Ultrasensitive DNA Detection,” Nano Letters, 3,597-602 (2003).15. J. Koehne, J. Li, A. M. Cassell, H. Chen, Q. Ye, H. T. Ng, J

Conference Session

Curriculum Innovations in Architectural Engineering Education

Collection

2011 ASEE Annual Conference & Exposition

Authors

Bekir Kelceoglu, Indiana University Purdue University, Indianapolis

Tagged Divisions

Architectural

product.Bibliography[1] About STEMworks INDIANA. (2011) Retrieved January 18, 2011, from http://www.stemworksindiana.org/?q=about/about-stem-works-indiana[2] Council for Interior Design Accreditation. (2009). Professional Standards. Grand Rapids, MI.[3] Panero, J., & Zelnik, M. (1979). Human dimension & interior space : a source book of design reference standards. New York: Whitney Library of Design.[4] Tilley, A. R., & Henry Dreyfuss Associates. (2002). The measure of man and woman : human factors in design (Rev. ed.). New York: Wiley. Page 22.446.7

Conference Session

NSF Grantees Poster Session

Collection

2011 ASEE Annual Conference & Exposition

Authors

Javier A. Kypuros, The University of Texas, Pan American; Horacio Vasquez, University of Texas, Pan American; Constantine Tarawneh, The University of Texas, Pan American; Robert D. Wrinkle, University of Texas, Pan American; Martin William Knecht, South Texas College

Tagged Topics

NSF Grantees

teaching and learning statics,” Proceedings of the ASEE AnnualConference, 2003.13 Dollár, A. and Steif, P. S., “Learning modules for the statics classroom,” Proceedings of the ASEE AnnualConference, 2003.14 Everett, L. J. and Villa, E. Q., “Assessment results of multi-intelligence methods used in dynamics,” Proceedingsof the ASEE Annual Conference, 2006.15 Everett, L. J. and Villa, E. Q., “Increasing success in dynamics course through multi-intelligence methods andpeer facilitation,” Proceedings of the ASEE Annual Conference, 2005.16 Bransford, J. D., Brown, A. L., and Cocking, R., editors. How People Learn: Brain, Mind, Experience, andSchool (Expanded Edition). National Academies Press, 2000.17 Kypuros, J. A. and Tarawneh, C

Conference Session

Computational Tools

Collection

2011 ASEE Annual Conference & Exposition

Authors

Thad B. Welch III P.E., Boise State University; Sam Shearman, National Instruments

Tagged Divisions

Computers in Education

and user interface operations (e.g., modulation/demodulation,coding/decoding, interleaving/deinterleaving, etc …) without exceeding the product’s bill ofmaterials (BOM) target. This processor must therefore, be fast and powerful enough, but not toocapable, since this will eventually drive up the component’s cost.A straight forward comparison of traditional communication system design and aUSRP/LabVIEW-based design follows. The USRP performs the traditional analog signalconditioning functions required of almost any radio, the required signal conversion (ADC andDAC), and then performs the rate conversion necessary to provide in-phase and quadrature (I &Q) signal samples, both to and from, the processor. In a USRP/LabVIEW-based system

Conference Session

Best of Computers in Education Division

Collection

2011 ASEE Annual Conference & Exposition

Authors

Marcial Lapp, University of Michigan; Jeff Ringenberg, University of Michigan; Kyle J. Summers, University of Michigan; Ari S. Chivukula, MPS; Jeff Fleszar, University of Michigan, Ross School of Business

Tagged Divisions

Computers in Education

: Question manager m interface to be uused by the ccourse instruuctor. Page 22.1481.5 Figurre 3: Active question q inteerface to thee displayed dduring lecturre.4. Featu ure Selectio onAs noted d in §2, many y implementtations of stu udent responnse systems eexist today. H However, thheMobile Participation P System provvides severaal features thhat are currenntly not offered in otherdevices. It is these feeatures specifically that make m the MP PS superior tto other

Conference Session

K-12 and Pre-College Engineering Poster Session

Collection

2011 ASEE Annual Conference & Exposition

Authors

Terence J. Fagan, Central Piedmont Community College; Gerald D. Holt, Project Lead The Way

Tagged Divisions

K-12 & Pre-College Engineering

/const_inst1.html.7. Kafai, Y, and Resnick, M. (1996). Constructionism in practice: designing, thinking, and learning in a digital world. Retrieved from http://books.google.com/books?id=XaJiLh92ZCUC&dq=Constructionism&printsec=frontcover&source=in&hl =en&ei=2KP5TLWoH8OAlAeK44S8Bw&sa=X&oi=book_result&ct=result&resnum=12&ved=0CHwQ6AEw Cw#v=onepage&q&f=false.8. de Grazia, J.L., Sullivan, J.F.,Carlson, L.E., and Carlson, D.W. (2001). A k-12 / university partnership: creating tomorrow‟s engineers. Journal of Engineering Education, Oct. 2001 . pp. 557-563. Retrieved from http://soa.asee.org/paper/jee/paper-view.cfm?pdf=426.pdf.9. Ayorinde, E.O., Gibson, R.F. (1995). A pre

Conference Session

Build Diversity in Engineering Graduate Programs

Collection

2011 ASEE Annual Conference & Exposition

Authors

Jiabin Zhu, Purdue University, West Lafayette; Monica Farmer Cox, Purdue University, West Lafayette; Demetra Evangelou, Purdue University, West Lafayette; Cyndi Lynch, Purdue University, West Lafayette; Audeen W. Fentiman, Purdue University, West Lafayette; Phillip S. Dunston, Purdue University

Tagged Divisions

Minorities in Engineering

, B. “Leaving the Ivory Tower: A Sociological Analysis of the Causes of Departure from Doctoral Study.”Doctoral dissertation, University of Maryland, 1996.3. Brown, S. V. (2000). The preparation of minorities for academic careers in science and engineering. In G.Campbell, R. Denes, & C. Morrison (Eds.), Access denied: Race, ethnicity, and the scientific enterprise (pp. 239–268). New York: Oxford University Press.4. Redmond, S. P. (1990). Mentoring and Cultural Diversity in Academic Settings. American Behavioral Scientist,34(2), 188-200.5. Hill, R. D., Castillo, L. G., Ngu, L. Q., & Pepion, K. (1999). Mentoring Ethnic Minority Students for Careers inAcademia: The WICHE Doctoral Scholars Program. The Counseling Psychologist, 27(6), 827

Conference Session

Techniques to Enhance Environmental Engineering Courses

Collection

2011 ASEE Annual Conference & Exposition

Authors

Andrew Ross Pfluger, U.S. Military Academy; Weimin Wu, Stanford University

Tagged Divisions

Environmental Engineering

of bacteria, i.e., methanotrophs. The laboratory study is conducted as follows:in sterilized serum bottles, methanotrophic bacteria in the exponential growth phase areinoculated in a Milli-Q water-based medium containing nitrate, other key nutrients (P, K, Na,Mg, Ca, etc.), and selected trace metals. The primary substrates, methane and oxygen, are thenintroduced and each bottle is placed on a shaker-table for incubation. Gas samples areperiodically withdrawn from the headspace of each bottle and manually injected into a gaschromatograph to measure the concentrations of methane, oxygen, and carbon dioxide. Thisallows students to monitor the amount of substrates consumed and the amount of end productproduced at different time points. Students

Conference Session

Teaching Dynamics

Collection

2011 ASEE Annual Conference & Exposition

Authors

Kristi J. Shryock, Texas A&M University; Arun R. Srinivasa, Texas A&M University, Department of Mechanical Engineering; Jefferey E. Froyd, Texas A&M University

Tagged Divisions

Mechanics

evidencefrom an offering of the course instead of perceptions of faculty members about what they mightwant. This process also provided some insight into the alignment of skills engineering faculty Page 22.153.5felt were necessary to be successful in the course and those that are actually utilized in thecourse. From this analysis, a list of skills in mathematics and physics mechanics was constructed(see Figure 2).Figure 2. Portion of Q-matrix Used to Determine Skills in Homework and Exam Problems Homework Problems 3-1 3-5 3-6 3-47

Collection

2011 ASEE Midwest Section Conference

Authors

Thomas R. Marrero

   B) Output Power POutput = Q * p where Q is flow and p is the head POutput = 0.0000225 m3/s*6.55kPa*1000 Pa/kPa = 0.147W C) Efficiency Efficiency = POutput / PInput * 100% . Efficiency = *100% = 22.3% . These results are presented in Table 5 for impeller speeds from 2010 to 3510 rpm.C. Determination of System Curve and

Collection

2011 Pacific Southwest Section Meeting

Authors

Bruno Osorno; William Oh

solar cellsFig. 2 is the equivalent circuit of a simplified single-diode model (SSDM) of PV cells. Thecurrent through a PV cell is given by;   v  iRs   i  i ph  isat e t   1 v (1)     AkT vt T   (2) q Proceedings of the 2011 PSW

Collection

2011 Northeast Section Meeting

Authors

Bhushan Dharmadhikari; Prabir Patra; Navarun Gupta; Lawrence V. Hmurcik

, “Electrical, rheological,morphological studies in co-continuous blends of polyamide 6 andacryonitrile/butadiene/styrene (ABS) with multiwall carbon nanotubes prepared by meltblending”, Composites Science and Technology 69, pp 365-372 (2009), available onlineat sciencedirect.com.[7] Q. Li, Y. Li, X. Zhang, S. Chikkannanavar, Y. Zhao, A. Dangelewicz, L. Zheng, S.Doorn, Q. Jai, D. Peterson, P. Arendt, and Y. Zhu, “Structure dependent electricalproperties of carbon nanotube fibers”, Advanced Materials 19, pp 3358-3363 (2007).[8] P. Poetschke, M. Abdel-Goad, I. Alig, S. Dudkin, D. Lellinger, “Rheological anddielectrical characterization of melt mixed polycarbonate-multiwalled carbon nanotubecomposites”, Polymer 45, pp 8863-8870 (2004), available online at

Conference Session

Frontiers in EM Education

Collection

2011 ASEE Annual Conference & Exposition

Authors

Ertunga C. Ozelkan, University of North Carolina, Charlotte; Agnes Galambosi, University of North Carolina, Charlotte

Tagged Divisions

Engineering Management

Introductions at thebeginning of a semester, HW assignments, Discussion Questions, usage of course Calendar, Q/AForum, term Projects, posting Slides, conducting Quizzes, showing Industry Videos (or softwaredemonstrations) and usage of Chat, which all received scores 4 or higher. Page 22.1151.8 Ranking of Online Tools and Practices 5 4.8 4.7 4.7 4.6 4.5 4.5 4.4 4.4 4.2 4.1 4.1 4.0 4.0 3.8 4

Conference Session

Poster Sessions for Unit Operations Lab Bazaar and Tenure-Track Faculty

Collection

2011 ASEE Annual Conference & Exposition

Authors

Laura Coon, Washington State University; Paul B. Golter, Washington State University; Derek Allen Cline, Washington State University; David B. Thiessen, Washington State University; Bernard J. Van Wie, Washington State University

Tagged Divisions

Chemical Engineering

chemical engineers are well acquainted with the theory and correlations developed forheat exchanger design we describe the exact methods used for calculations in the particular labexperiment at hand so there will be no confusion as to what was done. Experimentally, theamount of heat transferred in the exchanger may be calculated from the average valuesdetermined by energy balances for the shell and the tube sides of the exchanger. Eq 1 Eq 2Validity of the experimental values for the two fluids may be checked by comparing the twovalues of Q – this adds validity to

Conference Session

Recruitment, Retention, and First-Year Programs in ECE

Collection

2011 ASEE Annual Conference & Exposition

Authors

Qing Zheng, Gannon University; Ramakrishnan Sundaram, Gannon University

Tagged Divisions

Electrical and Computer

assemble and validate the project with thePCB-based platform. From the follow-up survey for the Engineering Day and the ECEDay events, it has been shown that these events had a very positive effect on high schoolstudents for considering careers in ECE.Bibliography:[1] Sundaram, R. and Zheng, Q., “Stem-Based Projects to Integrate the Undergraduate Electrical and Computer Engineering Program with the K-12 Stem curriculum,” Proceedings of the 2010 American Society for Engineering Education Annual Conference & Exposition, Louisville, Kentucky, USA, June 20-23, 2010.[2] Frechtling, J. and Sharp, L. (2002). The 2002 User-Friendly Handbook for Mixed Evaluation, NSF 02-057. Arlington, VA: NSF.[3] NSF 97-153: User-Friendly Handbook for

Conference Session

Innovations in Teaching Physics or Engineering Physics I

Collection

2011 ASEE Annual Conference & Exposition

Authors

Patricia F. Mead, Norfolk State University; Ruth A. Streveler, Purdue University, West Lafayette; Lauren D. Thomas, Virginia Tech; Candace A. Cobb, Norfolk State University

Tagged Divisions

Engineering Physics & Physics

, Gain Saturation, and Gain Cross-Section Longitudinal and Transverse Modes Homogeneous and Heterogeneous Broadening Rayleigh Range Spontaneous and Stimulated emission or absorption Blackbody Radiation and Spontaneous/Stimulated Radiation Spectral, Spatial, and Temporal Coherence Finesse and Q-factor Etalon Population inversion Constant phase surfaceThe final language related challenge noted in this work is the use of a similar symbol to representa parameter in multiple contexts. For example, the term linewidth is in laser theory

Conference Session

Design Communications & Cognition II

Collection

2011 ASEE Annual Conference & Exposition

Authors

Andrea Goncher P.E., Virginia Polytechnic Institute and State University; Aditya Johri, Virginia Polytechnic Institute and State University

Tagged Divisions

Design in Engineering Education

the video data. Table 1. Constraint Codes Code ExplanationDesign ConstraintsManufacturability DC/M Ease of manufacturability of final designHealth & Safety DC/HS Health and safety of end users engaging with final designLife Cycle DC/LC Life cycle concerns of final designEthical DC/E Ethical considerations associated with final designErgonomic DC/ERG Ergonomic considerations associated with final design and end usersQuality DC/Q Overall quality of final designFunctionality

Conference Session

Engineering Mathematical Potpourri

Collection

2011 ASEE Annual Conference & Exposition

Authors

John Schmeelk, Virginia Commonwealth University, Qatar

Tagged Divisions

Mathematics

, W., K., Digital Image Processing, John Wiley & Sons, NY, (1991). 13. Russ, C. J. and Russ, J. C., Introduction to Image Processing and Analysis, CRC Press, Florida, (2008). 14. Schalkoff, R. J., Digital Image Processing and Computer Vision, John Wiley & Sons, NY, (1989). 15. Schmeelk, J., “Transforms Filters and Edge Detectors in Image Processing”, International Journal of Pure and Applied Mathematics, 46, No. 2, (2008), 199-208. 16. Zhang, I., Wang, Q.,G., Qi, J., P.,” Processing Technology in Microscopic Images of Cancer Cells in Pleural Fluid Based on Fuzzy Edge Detection Method”, Journal of Physics: Conference, 48, (2006), 329-333.JOHN SCHMEELKjschmeelk@qatar.vcu.eduVirginia

Conference Session

Laboratory Development in ECE

Collection

2011 ASEE Annual Conference & Exposition

Authors

Sergey N. Makarov, Worcester Polytechnic Institute; Reinhold Ludwig, Worcester Polytechnic Institute; Kaung Myat Win, Worcester Polytechnic Institute, ECE Department

Tagged Divisions

Electrical and Computer

based on the Lorentz force effect.1.2 Second step - Generator action: E  W / q  lB V Fig. 2. Linear generator (linear dynamo) based on the Lorentz force effect.1.3 Third step - Brake action: Fb  lI b B  l 2B 2 / R Page 22.276.3Fig. 3. Braking effect of the Lorentz force - motor (or generator) setup.2. Rotating DC machine. Torque constant and voltage constant (one lecture)The lecture sequence is outlined using four figures that follow. We first derive the torqueconstant, then introduce the stall torque and the stall current. Finally, we proceed to theequivalent circuit model of a motor and to the voltage constant. This lecture

Conference Session

Investigating Alternative Energy Concepts

Collection

2011 ASEE Annual Conference & Exposition

Authors

Ignacio B. Osorno, California State University, Northridge

Tagged Divisions

Energy Conversion and Conservation

) ௄்Where "்ܸ " is the thermal potential and it is equal to and “K” is the BOLTZMAN constant, “q” is the charge ௤of an electron and “T” in C is temperature, and "ܸ" is the applied voltage. 0 ‫ ܫ‬ൌ ‫ܫ‬௦௖ െ ‫ܫ‬஽ (2) ೇ ‫ ܫ‬ൌ ‫ܫ‬௦௖ െ ‫ܫ‬଴ ൜݁ ೇ೅ െ 1ൠ (3)The open circuit voltage occurs when ‫ ܫ‬ൌ 0 and therefore we obtain the following equations