change in Page 22.857.2temperatures due to seasons, exposure to humidity and prolonged outside exposure arestill to be explored. The DSSC sealing system including sealing material and sealingprocedure need to be further investigated.DSSC Operation Principle: A DSSC comprises of a working electrode made of dye-sensitized TiO2nanoparticles fabricated on a transparent conducting oxide (TCO), a Pt counter electrode,and an electrolyte containing iodide/triidode (I-/I3-) redox couple. The photo conversionefficiency of DSSC is significantly dependent on the quality of TiO2 electrodes. Theschematic representation of the DSSC is shown in Figure 1. A
, integration, and methodology and also in written and oralcommunication skills. Methodology used to evaluate the effectiveness of this integratedcourse in terms of learning outcomes is also described. 1. Introduction:A typical building is a complex system in which each discipline’s design proposals havean impact on all of the other disciplines in a cascading fashion. Also, integration is aconcern at different levels of the design process. In particular, an integrated designbetween the functionality of the mechanical systems and the desirability of thearchitectural design has been recently considered comprehensively in the development ofcommercial buildings; although this integration has always been a concern in the airplaneand automobile industry
increasing air pollution are leading to the research anddevelopment of alternate energy generation. Hydrogen fuel cells are one of the most promisingalternate energy supplies. The Hampden Fuel Cell Technology Trainer H-FCTT-1 allowsstudents to create a grid independent power supply that uses only hydrogen as its fuel. Thesystem introduces students to the fuel cell power supply technology as an environmentallyfriendly method of generating power directly from a hydrogen reaction. This paper describes theintegration of the H-FCTT-1 hydrogen fuel cell trainer in the undergraduate class titled“Introduction to Circuits” in the Electrical Engineering Technology (EET) program at theUniversity of Northern Iowa. The learning objectives are to run three
are well established but for a commodity like energy, widespreadadoption depends on delivering lower costs and matching loads both in time and location.These are extremely difficult performance goals for but the rewards for success are highwith a global market waiting eagerly.The rationale for making space to cover the path to technology maturity in an alreadyovercrowded curriculum is that it defines many future engineering jobs. The solar cells,batteries and fuel cells can be manufactured today but can they beat the internationalcompetition to deliver the tough commodity performance metrics? High-level roadmapsfor alternative energies have been formulated 1 but the goals remain stubbornly distant 2.That emphasizes the need to recruit and
and education.The efficiency of the power plant can be improved by using power electronics and electricenergy storage. The power conditioning unit combines the electric energy from both the solarpower plant and the wind power plant. The dc output energy of the hybrid power plant will beconverted to ac and will be synchronized with the electric power grid by the power conditioningunit. The AC output will be generated and controlled by the power conditioning unit which hasmultiple benefits of both generation of electricity with high efficiency and improvement ofelectric power quality.1. IntroductionIn recent years, there have been concerns due to global warming across the world. Therefore,most countries are working on using renewable energy
andTechnology Gateway Ohio (SETGO) Summer Research Program at Bowling Green StateUniversity which facilitated undergraduate research and was sponsored by the National ScienceFoundation.1Solar Cell I-V Characteristic CurvesSolar cells are characterized by their current-voltage (I-V) characteristic curves.2,3 An exampleof one is shown in green in Fig. 1. This curve shows how the voltage generated by the solar cellvaries with the current drawn from it. The I-V curve shows how the solar cell will operate undervarying parameters such as light intensity and temperature. Ironically, the hotter the solar cellgets, the less efficient it becomes. With the solar cell being underneath the sun all day, thisbecomes an issue.Two important points on the I-V
Protection SystemsAll three on-site courses are senior elective level courses to define “power emphasis” in theprogram, particularly, in Electrical Engineering Technology.The certificate courses also include additional two on-line courses that are offered by NPI. Thesecourses are selected with advising faculty’s guidance from the online course offerings providedby NPI which include: 1. Nuclear Power Plant Fundamentals 2. Nuclear Power Plant Systems – PWR (Pressurized Water Reactors) 3. Nuclear Power Plant Systems – BWR (Boiling Water Reactors) 4. Nuclear Power Plant Operations 5. Human Performance for Nuclear Power Plant EngineersThese certificate courses can be taken as electives by mechanical engineering and engineeringtechnology
graduate and undergraduate engineering students. Job and long-termcareer opportunities for recent graduates involved with the energy program are also discussed.Lastly, a discussion is included regarding what changes and additions that are planned for theenergy program at Lawrence Tech to keep the program vibrant and adapting to the ongoingknowledge and understanding needs of today’s engineering graduates.1) BackgroundIn the early spring of 2003 Lawrence Technological University (also known as Lawrence Tech)submitted a proposal to NextEnergy (a nonprofit corporation created by the State of Michiganwith the mission to support and promote alternative energy within the State of Michigan) andwas awarded one of five $100,000 grants in early summer 2003
. Page 22.105.2IntroductionFinding thermodynamic properties for various substances has traditionally been accomplished byusing thermodynamic tables. Interpolation between established values is normally requiredwhen the desired values of the properties do not exactly match the tabulated values. This can bea time-consuming process, particularly when iterative calculations requiring thermodynamicproperties are involved. A Microsoft Excel add-in that is available per Reference [1] includesthermodynamic properties for air and for flue gasses. To provide the versatility needed for awide variety of fuels and their combustion products, the thermodynamic tables from Reference[2] were written into Visual Basic Applications (VBA) in a Microsoft Excel file
, one of thefounders of pragmatism in education who believed that learning was active and that mathcould be learned through everyday activities such as cooking.[1] Building upon thisconcept, RAMP-UP has created original activities that anyone could recreate in theirhome to help teach math. For example, one of the Program’s most popular activities isthe “Marshmallows and Toothpicks Activity” where students build two-dimensional andthree-dimensional geometric shapes using marshmallows and toothpicks.Following a pragmatist approach, it is believed that active learning is a fun and feasibleteaching style that replaces words with activities as the means of communicating newconcepts. RAMP-UP creates opportunities for active learning through many out
configurations. PV modules,commonly called panels, are a collection of PV cells that are connected in series and/or parallelcombination and bound together on a common frame. A row of modules connected in series iscalled a series string or simply, a string. The combiner box contains several protection devicessuch as circuit breakers and combines the series strings into a single output. The inverterconverts the DC power from the array into standard AC electricity.Solar Radiation and Local ClimateSolar irradiation is the total amount of solar energy collected on an area over time. Solarirradiation is typically expressed in kWh/m2. At most locations on Earth, solar irradiation willpeak around 1 kW/m2 every day around solar noon. Insolation is the solar
level and for community college vocational programs for mechanics. The project also includes a public dissemination component, including partners from the St. Louis Science Center. This program began recently, in the fall of 2010. In order to provide an initial evaluation of a sample of courses in the program a survey was administered to students currently enrolled in undergraduate and graduate courses that are part of the program. One part of the survey focused on the impact of the courses on motivation and engagement, and the other consisted of Felder’s Inventory of Learning Styles (ILS) [1]. Results indicated that motivation and engagement, in this context, could be conceived of as
RequirementsThe battery cycler is intended to work with individual cells of voltage ranging from 1.0 to 4.2volts. This range covers popular battery types such as NiMH and Li-Ion. It is intended to allowfor high current charge and discharge of cells 2- 5 amp-hours. Ideally, the cycler can beexpanded to test from 1 to 100 cells. The cycler can also heat the cells to an elevated temperatureand keep that temperature regulated with less than 1 degree C error.Commercial Equipment OptionsSeveral life cycle testing commercial solutions are available and offer a good set of features fordata acquisition, selection of charge/discharge profiles, and high or low current dischargecapability. However, the cost of these systems is high. Unfortunately, these systems can
traditional non-renewable energy sources are dwindling and concerns over environmentalpollution are rising everyday due to increased use of fossil fuels, the focus of the automotive andboat industry have shifted to production of hybrid electric vehicles that are more energy efficientand have less green house gas emission rates. In particular, there is an educational and industrialincrease in hybrid and electric boat projects [1-5]. The first electric boat was developed by Moritzvon Jacobi in 1839 in St Petersburg, Russia, a 24-foot boat which carried 14 passengers at3 mph. However, it took more than 30 years of battery and motor development before this craftbegan to be deployed in any numbers. In 1886, an electric boat crossed the English Channel
included.There are several other software vendors that have solar cell simulations which are utilized in industry, such asETAP and PSCAD.Solar cell model-The solar model that is studied and analyzed is shown in fig. 1. It is quite a simple circuit andeasy to model. The modeling results are accurate and therefore they validate the goodness of the model.Semiconductor technology analysis is kept to a minimum since the purpose of this paper is to demonstrate asimple, yet effective way to teach the modeling of solar cells using Pspice and Matlab. IL I RS
Engineering Education, 2011 Low-Cost River Simulator for 100W Hydro-Kinetic Turbine Testing AbstractIn a multi-year project our students are designing, prototyping, and testing hydro-kinetic devicesintended to provide electrical power in remote regions by extracting energy from river currents.The low-cost submersible devices must not disturb surface use of waterways while producingbetween 20 and 100 watts of power for river currents between 1 and 3 m/s.These hydro-kinetic power systems must be tested in a full range of water flow velocities. Localriver testing does not readily provide a wide range of flow velocities and commercially availablewater tunnels are infeasible for this
used in universities worldwide.This paper presents an integrative approach to teaching power electronics converterexperiments that integrate digital control. The approach uses a collection of tools thatinclude both software (MATLAB and LABVIEW) and low cost hardware (micro-controller PIC16F877). Using human linguistic terms and common sense, a closed-loopcontrol system incorporating fuzzy logic with a small rule base has been developed andimplemented for a special class of hard-switching dc-dc converters.Educational ObjectivesThe fundamental educational objectives are: 1) to provide hands-on experience in practical power electronics applications; 2) to reinforce and support lecture-based courses in power electronics; 3) to train a new
students6-11. Based on these andadditional references the following course syllabus was developed. The outline of the courseincludes (ten 3-hour lectures): 1. Basic principles of energy generation 2. Introduction to renewable energy systems 3. Electric machines Basics; Electric machines for renewable 4. Solar energy fundamentals 5. Photovoltaic energy production; Photovoltaic systems 6. Wind energy resource characteristics 7. Wind energy conversion systems: aerodynamic and electric aspects 8. Wind energy modeling aspects 9. Fuel cell systems 10. Distributed generation and power qualitySince this course deals mainly with the analysis and the components of the wind and solar energyconversion systems, as well the analysis of
. Page 22.1665.1 c American Society for Engineering Education, 2011 Virtual Power Producers and Distributed Generation in Energy Trading Markets: An Approach to the Integration of Renewable Energy in Latin America Instituto Superior de Engenharia de Lisboa - ISEL Rua Conselheiro Emídio Navarro, 1. 1949 - 014 Lisboa – Portugal Affiliation to GECAD - Knowledge Engineering and Decision Support Research Center Abstract - In order for governments from around the world, but more specifically from LatinAmerica to be able to respond and meet increases in electrical power demand in the coming yearsand deal with the
policies and renewable energy initiatives worldwide. New industry in thissector demands technicians, technologists and engineers with training in alternative energies.Between now and 2017, Canadian labour force requirements are expected to more than double inwind, solar photovoltaic and bioenergy, and triple in solar thermal industries.1 Globally, a 11%compound annual growth rate in renewable energy demand is predicted to persist for the nextdecade, with an attendant US$2.2 trillion investment in renewable energy power generation.2Already the global market value of green energy is nearly US$5.2 trillion.3Colleges and universities across North America are hastening to develop programs that willserve these new workers and industries. The programs
Alternative Energy ProgramsIntroductionEnvironmental issues, U.S. dependence on foreign oil and depleting fossil fuel reserves: all ofthese issues represent an increasing awareness of the need for energy efficiency and alternativeand renewable energy education. Almost half (49%) of all energy produced in the U.S. isconsumed by the building sector. This is almost the same amount of energy consumed by bothtransportation (28%) and industry (23%) combined. [1] According to the U.S. EnergyInformation Administration, fossil fuels supply 76% of the total building sector energyconsumption. To address the building sector, architect Edward Mazria, in 2002, establishedArchitecture 2030, a non-profit, non-partisan, and independent organization. Architecture
resources have become significant contributorsto energy usage among both developed and developing countries. Rapidly growingeconomies of developing nations such as China, Brazil and India have significantlyincreased use of energy in these and other nations. In addition, increasing climate changeconcerns as a result of increasing use of fossil energy has made the public more aware ofthe issues and problems associated with energy usage. Figure 1 from Department ofEnergy1 clearly shows the increasing trend of energy use and projected increases inenergy use. It is interesting to note from Figure 1 that use of renewable energy resourceshas also increased with an increase in overall energy usage and more and more renewableenergy sources are expected to
,mathematics, and engineering sciences are applied to convert resources optimally to meet statedobjective. Among the fundamental elements of the design process are the establishment ofobjectives and criteria, synthesis, analysis, construction, testing and evaluation” 1.For the last few years the focus of the mechanical engineering program of Aerospace andMechanical Engineering department at Saint Louis University has concentrated towardsincorporating renewable energy projects in our senior design courses.In this paper, we will demonstrate the following three points, (1) constraint-based innovativedesign concepts exercising fundamental engineering and science principles, (2) well definedproject scope to satisfy student, industrial reviewers and
MATLAB course,who the instructor was and then a series of questions concerning specific functions andoperations to determine immediate recall of the information. The most telling question was forthe students was to assess their own comfort level with the material based on the 0-4.0 scale thatis used for grading in the 4-year institution where this is being instituted. Table 1 gives the rawdata sorted by comfort level selection Table 1 Students Comfort level with MATLAB Mapped to Grading Scale Level of comfort 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.0 Number of students 3 7 9 10 13 3 7 4The average comfort level was 2.25 with the median being 2.5 of the 56 students surveyed. It isnot unusual for non ME majors to
Thermodynamics (ME 680) duringtheir fourth or fifth years. ME 413 and 680 form a progression in course work into the study ofThermodynamics and, therefore, the courses are carefully integrated. For a detailed descriptionof ME 413 and ME 680 refer to Bailey et al., 2004 [1]. After successfully completing AdvancedThermodynamics, students can choose to continue the study of classical thermodynamics byselecting a capstone design experience which incorporates advanced thermodynamics principlesas discussed in George et al, 2006 [2]. A select group of students also conduct thermodynamicrelated research in their pursuit of a Masters of Science degree and related publications [3,4,5
the Taylor WildernessResearch Station (TWRS) in central Idaho. It consists of a hydroelectric generator, aphotovoltaic array, a fossil fuel generator, appropriate interconnections, and interface units forcompatibility and control of the various generators and loads. Design and installation of this5.3kW average, 25kW peak electric power system was entirely a student project from start tofinish. As explained in this paper, this project is complete; the customer received the keys on 23July 2010.A prize-winning ASEE paper presented at the 2010 ASEE Annual Conference in Louisvilledescribes the design of this system.1 While that paper was being presented in June 2010,installation of the system was ongoing. This paper presents the completed system
surface normal to thesun’s rays on any day of the year using 0.33 cos (360𝑛𝑛)𝐺𝐺𝑜𝑜𝑜𝑜 = 𝐺𝐺𝑆𝑆𝑆𝑆 �1 + 365 � (1)where 𝑛𝑛 represents the nth day of the year. This equation accounts for the fact that the earth-sundistance changes continuously throughout the year. The fact that the axis of rotation of the eartharound itself is tilted 23.45o from the axis of the orbital plane of the earth around the sunrequires the use of the solar declination angle, 𝛿𝛿, given by 284+𝑛𝑛𝛿𝛿 = 23.45o 𝑠𝑠𝑠𝑠𝑠𝑠 �360 365
for tourists, water pumping foragriculture, schools, hospitals, and emergency use such as in rescue operations, field hospitals,refugee camps. To this list one may add home use during power outages anywhere. Reference 7shows that very small amounts of power and energy suffice for several critical applications. Thisrealization in turn leads to the design of micro renewable energy systems. We define therequirement as between 0 and 3 kilowatts of rated power, providing enough storage to deliver upto 24 kWh per day.Space and terrestrial micro energySmall power generation systems, especially those powered by renewable resources, encountersome common issues: 1. Low thermodynamic efficiency of heat engines with small temperature gradients 2. Large
infrastructure, and thenproceed to capture and bring solar power from Space. Page 22.1125.3Learning issue #1: concept resilienceTo understand the issues in power beaming, enough to consider developing viable solutions, thelearner must surmount a daunting array of obstacles. Some of the issues and areas aresummarized in Table 1. The usual conclusion on seeing this list would be that it would require across-disciplinary team of specialists, which is an expensive proposition, to be deferred until amajor project is funded. The corollary to this is that no such project can be contemplated untilconcept development has shown that there is a feasible path in the
-basedteaching environment enables students to acquire experience and evaluate their previous results.1 Phenomenal interest in the renewable energy and energy conservation technologies has led to anincreased demand for engineering and engineering technology graduates who are not only skilledin installation, maintenance of equipment used in theintelligent infrastructure systems required togenerate and supply electricity in commercial and residential applications, but who alsounderstand the fundamental principles underlying the design and operation of alternative systems. Page 22.1586.2However, incorporation of such learning processes and the state-of