Conference Session

Renewable Energy in Classroom

Collection

2014 ASEE Annual Conference & Exposition

Authors

Muhittin Yilmaz, Texas A&M University, Kingsville; Naren Reddy Dhansri, TAMUK

Tagged Divisions

Energy Conversion and Conservation

real wind speed values at whichthe wind turbine motor shaft rotates. The given wind speed will be the reference speed to themotor system, i.e., the presumed wind speed will be converted to a reference voltage to drive themotor. The presumed wind turbine PMDC generator is connected to the presumed wind turbinemotor, rotating at the same speed and generating corresponding voltage values. The teams weregiven the following concept questions during the actual laboratory and were asked to include thecorresponding answers in their technical laboratory report: Q) Investigate the wind turbine mathematical equations, explain the variables affecting the power & voltage generation, and introduce another parameter to reflect real-life

Conference Session

Electrical Energy Courses - Labs and Projects

Collection

2014 ASEE Annual Conference & Exposition

Authors

Herbert L. Hess, University of Idaho, Moscow; Brian K. Johnson, University of Idaho, Moscow; Clifford J. Chapman, University of Idaho

Tagged Divisions

Energy Conversion and Conservation

® readily available on a university-widelicense.The program has an attractive level of sophistication. Forexample, its inputs are the following: physical dimensions,number of poles and slots, air gap width, frequency, positiveand negative sequence inputs, appropriate motor or generatorsign convention, power and torque output, resistances,reactances, simulation time and time step, and calculationdensity. The tool then builds and displays an appropriatephysical cross-section diagram of the stator created from the givendimensions, showing a correct number of slots with their windings properlypitched. It calculates a complete lumped parameter d-q model, displaying itsparticulars on request. The tool then creates the rotor from the given dimensions

Conference Session

Renewable Energy in Classroom

Collection

2014 ASEE Annual Conference & Exposition

Authors

Omonowo David Momoh, Indiana University Purdue University, Fort Wayne

Tagged Divisions

Energy Conversion and Conservation

electrical power systems are treated. The two methods of three-phase power systemrepresentation – wye connection and delta connections are presented. The concept of powertriangle is introduced and the inter-relationship between real, reactive and apparent power asillustrated in equation 1 and figure 1 is discussed. 𝑆𝑆 = 𝑃𝑃 + 𝑗𝑗𝑗𝑗 (1)whereS = Apparent Power (VA)P = Real Power (W)Q = Reactive Power (VAr)θ = Phase angle between the line current and the line voltage Page 24.388.4

Conference Session

Miscellaneous Topics in Energy Education

Collection

2014 ASEE Annual Conference & Exposition

Authors

David C. Zietlow, Bradley University

Tagged Divisions

Energy Conversion and Conservation

problems, heat transfer is either a given input or is a dependentvariable where the conservation rvation of energy is used to solve for this elusive quantity. In thissection, a basic understanding of heat exchangers (see Figure 3) is presented. A triangle is usedto represent one-side side of a heat exchanger. The hypotenuse of the triangle represents the heattransfer surface area while the sides allow for the entering and exiting of the heat transfer fluid. TL Q THFigure 3.. Schematic of a Heat ExchangerAssuming the students have already been exposed to the three modes of heat transfer and theircorresponding

Conference Session

Miscellaneous Topics in Energy Education

Collection

2014 ASEE Annual Conference & Exposition

Authors

Chris Foreman, Purdue University, West Lafayette; Karina Clarissa Halim, Purdue University; Rajeswari Sundararajan, Purdue University, West Lafayette

Tagged Divisions

Energy Conversion and Conservation

at which coal is converted into electricity, and has the units of BTU/kWhr. A pound ofcoal has a certain amount of heating value, HHV, which varies from 4000-15000 BTU/lbdepending on its quality and carbon content. The quantity of coal burned in the unit, Coal, resultsin a heat energy input, Q, given in equation (6). This is divided by the electrical energygenerated, which is the work done by the generator, W. Lower values of heat rate are better asthis indicates less coal necessary (less heat energy input) for a given amount of electrical energyoutput. Typical values for heat rate vary from the very good of around 9000 BTU/kWhr (38%efficient), to poor of around 11000 BTU/kWhr (31% efficient). Both BTU and kWhr are units ofenergy. To convert