Conference Session

Design Experiences in Energy Systems

Collection

2007 Annual Conference & Exposition

Authors

Jorge Alvarado, Texas A&M University

Tagged Divisions

Energy Conversion and Conservation

so an average soil temperature rise could be minimized. The studentperformed first-law analysis for the GSHP which was modeled as a closed system with a linesource of heat as shown in Figure 5. From the first law of thermodynamics, the energy balanceis as: E$ in / E$ out ? FE$ system ? FU$ system (1)For the GSHP shown in Figure 5, Equation 1 can be expressed as: FT Q$ in ? m © c p (2) Ft FTWhere, Q$ in , m, cp, and are the heat rate in, mass of soil, specific heat of soil, and Fttemperature rise per unit time, respectively. To

Conference Session

Experiences in Teaching Energy Courses

Collection

2007 Annual Conference & Exposition

Authors

Brendan Egan, Milwaukee School of Engineering; Stephen Dechant, Milwaukee School of Engineering; Christopher Damm, Milwaukee School of Engineering

Tagged Divisions

Energy Conversion and Conservation

, and to exhaust) wasdetermined. ⋅ 28.7 kW Q amb = = 0.082 = 8 percent 348.5 kW ⋅ 76.3 kW Q cooling = = 0.2189 = 22 percent 348.5 kW ⋅ 115 kW E elec = = 0.3299 = 33 percent 348.5 kW ⋅ 128 kW Q exhaust = = 0.367 = 37 percent 348.5 kWThese percentages were used in the EES model in order to calculate the heat flow to each areawhen the system electrical output was modified.Using the EES model, the following table was constructed to detail the electrical energygenerated and heat load provided by the exhaust gas boiler for different engine loads. Table 2

Conference Session

Developments in the Energy Laboratories

Collection

2007 Annual Conference & Exposition

Authors

David Blekhman, California State University Los Angeles

Tagged Divisions

Energy Conversion and Conservation

operatingparameters of the engine, and complete the First Law analysis on the engine as an open system. Page 12.1001.5The heat loss from the engine to the environment which has a convective and a radiativecomponents is estimated as follows: ( ( Q& = A h (Tsurf − Tair ) + ε σ Tsurf 4 − Tair4 )) (1)where A (m2) is the engine surface area. The convective heat transfer coefficient h, the surfaceemissivity ε, and the

Conference Session

Novel Applications of Computers/Software in Energy Education

Collection

2007 Annual Conference & Exposition

Authors

Robert McMasters, Virginia Military Institute; Michael Sexton, Virginia Military Institute; Craig Somerton, Michigan State University; Andre Benard, Michigan State University; Norbert Mueller, Michigan State University

Tagged Divisions

Energy Conversion and Conservation

, the programwill give correct results. For example, Table 1 below shows two possible systems of units thatcould be used. Page 12.942.4 Unit of Measure SI U.S. L m ft. o T K F k W/m⋅K Btu/hr ⋅ft⋅o F α m2 /s ft2 /hr q W/m2 Btu/hr ⋅ft2

Conference Session

New Trends in Energy Curriculum

Collection

2007 Annual Conference & Exposition

Authors

Kendrick Aung, Lamar University

Tagged Divisions

Energy Conversion and Conservation

theproject in front of the class followed by Q&A session from the class. To achieve outcomes (e)and (h), the instructor asked an alumnus who is working in a chemical plant to give a seminar onindustrial experience. In addition, discussions of engineering standards such as HydraulicInstitute Standards, and use of engineering handbooks are utilized where appropriate to providestudents exposure to professional conduct and necessity of lifelong learning.Lessons Learned There were 15 seniors taking the class in the fall semester. At the end of the course, studentswere asked to provide feedback on the course materials and their usefulness for their professionalcareer as an entry-level engineer. Most of the feedback is very positive, and 90% of the

Conference Session

Developments in the Energy Laboratories

Collection

2007 Annual Conference & Exposition

Authors

Andrew Gerhart, Lawrence Technological University; Philip Gerhart, University of Evansville

Tagged Divisions

Energy Conversion and Conservation

coordinating timing at high flow rates; the three most egregious outliers have beendropped from the following analysis.The data of most interest is friction-length parameter versus Reynolds number. The friction-length parameter was calculated by Leq Fpr 2 D 4 f ? / 1.5 D 8tQ 2where is water density, Q is measured volume flow rate, and the “1.5” is the sum of loss 4Qcoefficients for the entrance and the exit. Reynolds number is calculated by Re ? with p