OER Commons - Keywords: Efficiency
https://www.oercommons.org
daily12000-01-01T12:00+00:00The Animated Chalkboard 2006: Motion 1
https://www.oercommons.org/courses/the-animated-chalkboard-2006-motion-1
This zip file download contains a package of 22 Windows-based physics animations on velocity, acceleration, friction, momentum, rotational frames, and more. It was created as an <i>Animated Chalkboard</i> series, allowing educators to freely display the animations within their own presentations. Many animations plot motions graphically as they are shown. The folder includes explicit instructions on how to integrate the animations in Power Point Presentations.Richard TararaMathematicsGeoscienceLife SciencePhysicsTechnologyEducation2015-04-08T18:17:03.099481Course Related MaterialsStudent difficulties with concepts related to entropy, heat engines and the Carnot cycle
https://www.oercommons.org/courses/student-difficulties-with-concepts-related-to-entropy-heat-engines-and-the-carnot-cycle
We report the rationale behind and preliminary results from a guided-inquiry conceptual worksheet (a.k.a. tutorial) dealing with Carnot’s efficiency and the Carnot cycle. The tutorial was administered in an upper-level thermodynamics course at the University of Maine. The tutorial was implemented as the third in a three-tutorial sequence designed to improve students’ understanding of entropy and its applications. Initial pre- and post-tutorial assessment data suggest that student understanding of heat engines and the Carnot cycle improved as a result of tutorial instruction.John R. ThompsonTrevor I. SmithWarren M. ChristensenPhysicsEducation2015-04-08T18:12:59.628415Course Related MaterialsIllinois PER Interactive Examples: Nuclear Power Plant
https://www.oercommons.org/courses/illinois-per-interactive-examples-nuclear-power-plant
This is an interactive homework problem relating to heat engines and Carnot efficiency. A nuclear power plant with a core temperature of 5000 K, and a cooling tower temperature of 373 K is able to produce 1.21 gigawatts of power. Assuming that the plant operates at maximum efficiency, the user is asked to find how much water is evaporated per second at the cooling towers. This problem is accompanied by a Socratic-dialog "help" sequence designed to encourage critical thinking as users do a guided conceptual analysis before attempting the mathematics. It is part of a larger collection of interactive problems developed by the Illinois Physics Education Research Group.Gary GladdingEcologyForestry and AgricultureGeosciencePhysicsTechnologyEducation2015-04-08T18:10:03.228702Course Related MaterialsWhy Computer Architecture Matters
https://www.oercommons.org/courses/why-computer-architecture-matters
Over the course of a three-part series, the authors will walk through the implementation of a simple but computationally intensive algorithm and show how a series of incremental refinements to the code yields significant performance gains. In this first installment, they concentrate on instruction selection and scheduling.Cosmin PancratovJacob KurzerKelly ShawMatthew TrawickComputing and InformationPhysics2015-04-08T18:08:22.780902Course Related MaterialsSandia invention to make parabolic trough solar collector systems more energy efficient
https://www.oercommons.org/courses/sandia-invention-to-make-parabolic-trough-solar-collector-systems-more-energy-efficient
This news release, from Sandia National Laboratories, announces the development of a system to align the long parabolic trough mirrors in a solar collector, thereby making it much more efficient. The article contains a description of how such trough solar collector systems and the new mirror alignment devices operate. Images are provided along with an outline of the group's anticipated progress.MathematicsEngineeringPhysicsSpace Science2015-04-08T18:04:48.926299Course Related MaterialsZero-Energy Housing
https://www.oercommons.org/courses/zero-energy-housing-3
In this activity, learners investigate passive solar building design with a focus solely on heating. They learn how insulation, window placement, thermal mass, surface colors, and site orientation play important roles in passive solar heating. They use this information to design and build their own model houses, and test them for thermal gains and losses during a simulated day and night. Teams compare designs and make suggestions for improvements.Integrated Teaching and Learning Program, College of Engineering, University of Colorado at BoulderUniversity of Colorado at BoulderHistory, Law, PoliticsMathematicsChemistryEcologyEngineeringForestry and AgricultureGeosciencePhysicsSpace ScienceTechnologySocial SciencesEducation2015-04-06T13:49:41.553421Course Related MaterialsAll Things Green
https://www.oercommons.org/courses/all-things-green
This presentation by Bob Feldmaier of the Center for Advanced Automotive Technology (CAAT) was presented at the 2013 All Things Green conference and discusses the topics of green fleets, plug-in electric vehicles (PEVs), and PEV charging infrastructure. Provided in the presentation is a basic overview of PEVs and the types of PEVs, factors that affect PEV efficiency and range, the benefits of driving PEVs, the types and costs of installation of PEV charging infrastructure, and information on the federal Green Fleets program. This conference is annual and is hosted by the Macomb County Chamber. Other presenters at this conference came from Clean Light Green Light, Consumers Energy, General Motors, New Haven Schools, NextEnergy, Waste Management, and more.Center for Advanced Automotive Technology (CAAT)EcologyEngineeringForestry and AgricultureGeoscienceTechnologySocial SciencesEducation2015-03-17T13:07:01.252634Course Related MaterialsMaximum Power Point
https://www.oercommons.org/courses/maximum-power-point-2
Students learn how to find the maximum power point (MPP) of a photovoltaic (PV) panel in order to optimize its efficiency at creating solar power. They also learn about real-world applications and technologies that use this technique, as well as Ohm's law and the power equation, which govern a PV panel's ability to produce power.Integrated Teaching and Learning Program,Jack Baum, Stephen Johnson, William Surles, Abby Watrous, Malinda Schaefer Zarske (This high school curriculum was originally created as a class project by engineering students in a Building Systems Program course at CU-Boulder.)TeachEngineering.orgEcologyEngineeringForestry and AgricultureGeosciencePhysicsSpace ScienceTechnology2015-03-11T17:09:31.629238Course Related MaterialsEnergy Systems and Solutions
https://www.oercommons.org/courses/energy-systems-and-solutions-2
The Energy Systems and Solutions unit brings students through the exploration of science and engineering concepts as they relate to energy issues in everyday life. Issues surrounding energy production and energy consumption provide a relevant theme for learning basic science, math and engineering concepts, and also provide a convenient platform for introducing current scientific and technological developments into the curriculum. Energy-related issues touch the lives of every student. This project-based curriculum follows an engineering problem solving approach; students simultaneously learn and use scientific and mathematical content and processes as they solve an energy-related problem that is meaningful to them. By challenging them with a problem to solve, students are engaged in scientific and engineering processes, thereby reinforcing subject matter retention and targeting a wide range of learning styles in the classroom. The unit is organized into three main sections. The first section includes various activities designed to help students understand the problem at hand—namely, the issues surrounding our society's energy situation—so that they can realize the importance of what they are studying and the significance of their proposed solutions. An understanding of the problem forms the basis for the student learning that takes place in the second section, which includes basic energy concepts (forms, states, conversions, efficiency, etc.), content required by state and federal science educational standards. Students learn these concepts by participating engaging activities designed to show the relevance of the science material to the real world as well as to the solution of their assigned problem. Finally, in the last section of the unit, students apply the concepts they learned to complete a culminating project that requires them to consider what actions they can take to reduce our dependence of fossil fuels or otherwise provide a positive solution for our current energy crisis.Office of Educational Partnerships,Susan Powers, Jan DeWatersTeachEngineering.orgEcologyEngineeringForestry and AgricultureGeosciencePhysicsTechnology2015-03-11T17:09:22.809992Course Related MaterialsConcentrating on the Sun with PVs
https://www.oercommons.org/courses/concentrating-on-the-sun-with-pvs
Students design, build and test reflectors to measure the effect of solar reflectance on the efficiency of solar PV panels. They use a small PV panel, a multimeter, cardboard and foil to build and test their reflectors in preparation for a class competition. Then they graph and discuss their results with the class. Complete this activity as part of the Photovoltaic Efficiency unit and in conjunction with the Concentrated Solar Power lesson.Integrated Teaching and Learning Program,TeachEngineering.orgWilliam Surles, Abigail Watrous, Malinda Schaefer Zarske, Jack Baum, Stephen Johnson (This high school curriculum was originally created as a class project by engineering students in a Building Systems Program course at CU-Boulder.)MathematicsEcologyEngineeringForestry and AgricultureGeosciencePhysicsSpace ScienceTechnologyEducation2015-03-11T17:09:13.388034Course Related MaterialsConcentrated Solar Power
https://www.oercommons.org/courses/concentrated-solar-power
Students learn how the total solar irradiance hitting a photovoltaic (PV) panel can be increased through the use of a concentrating device, such as a reflector or lens. This is the final lesson in the Photovoltaic Efficiency unit and is intended to accompany a fun design project (see the associated Concentrating on the Sun with PVs activity) to wrap up the unit. However, it can be completed independently of the other unit lessons and activities.Integrated Teaching and Learning Program,TeachEngineering.orgWilliam Surles, Abigail Watrous, Jack Baum, Stephen Johnson (This high school curriculum was originally created as a class project by engineering students in a Building Systems Program course at CU-Boulder.)MathematicsEcologyEngineeringForestry and AgricultureGeosciencePhysicsSpace ScienceTechnology2015-03-11T17:09:08.504091Course Related MaterialsPointing at Maximum Power for PV
https://www.oercommons.org/courses/pointing-at-maximum-power-for-pv
Student teams measure voltage and current in order to determine the power output of a photovoltaic (PV) panel. They vary the resistance in a simple circuit connected to the panel to demonstrate the effects on voltage, current, and power output. After collecting data, they calculate power for each resistance setting, creating a graph of current vs. voltage, and indentifying the maximum power point.Integrated Teaching and Learning Program,Stephen Johnson, William Surles, Jack Baum, Abby Watrous, Eszter Horanyi, Malinda Schaefer Zarske (This high school curriculum was originally created as a class project by engineering students in a Building Systems Program course at CU-Boulder.)TeachEngineering.orgEcologyEngineeringForestry and AgricultureGeosciencePhysicsSpace ScienceTechnology2015-03-11T17:09:05.052330Course Related MaterialsSolar Power
https://www.oercommons.org/courses/solar-power-5
Students learn about solar energy and how to calculate the amount of solar energy available at a given location and time of day on Earth. The importance of determining incoming solar energy for solar devices is discussed.Integrated Teaching and Learning Program,Marissa H. ForbesOdessa GomezTeachEngineering.orgEcologyEngineeringForestry and AgricultureGeosciencePhysicsSpace ScienceTechnology2015-03-11T17:09:01.616477Course Related MaterialsLight vs. Heat Bulbs
https://www.oercommons.org/courses/light-vs-heat-bulbs-2
Students measure the light output and temperature (as a measure of heat output) for three types of light bulbs to identify why some light bulbs are more efficient (more light with less energy) than others.Jan DeWaters, Susan Powers, and a number of Clarkson and St. Lawrence University students in the K-12 Project Based Learning Partnership ProgramOffice of Educational Partnerships,TeachEngineering.orgEngineeringPhysics2015-03-11T17:08:59.776134Course Related MaterialsSolar Angles and Tracking Systems
https://www.oercommons.org/courses/solar-angles-and-tracking-systems
Students learn about the daily and annual cycles of solar angles used in power calculations to maximize photovoltaic power generation. They gain an overview of solar tracking systems that improve PV panel efficiency by following the sun through the sky.Integrated Teaching and Learning Program,TeachEngineering.orgWilliam Surles, Abby Watrous, Eszter Horanyi, Malinda Schaefer Zarske (This high school curriculum was originally created as a class project by engineering students in a Building Systems Program course at CU-Boulder.)MathematicsEcologyEngineeringForestry and AgricultureGeosciencePhysicsSpace ScienceTechnology2015-03-11T17:08:53.876568Course Related MaterialsPump It!
https://www.oercommons.org/courses/pump-it
Pumps are used to get drinking water to our houses every day! And in disaster situations, pumps are essential to keep flood water out. In this hands-on activity, student groups design, build, test and improve devices to pump water as if they were engineers helping a rural village meet their drinking water supply. Students keep track of their materials costs, and calculate power and cost efficiencies of the prototype pumps. They also learn about different types of pumps, how they work and useful applications.Integrated Teaching and Learning Program,Michael A. Soltys, Malinda Schaefer ZarskeTeachEngineering.orgEngineeringGeoscience2015-03-11T17:08:52.749477Course Related MaterialsA New Angle on PV Efficiency
https://www.oercommons.org/courses/a-new-angle-on-pv-efficiency
Students examine how the orientation of a photovoltaic (PV) panel relative to the sun affects the efficiency of the panel. Using sunshine (or a lamp) and a small PV panel connected to a digital multimeter, students vary the angle of the solar panel, record the resulting current output on a worksheet, and plot their experimental results.Integrated Teaching and Learning Program,TeachEngineering.orgWilliam Surles, Jack Baum, Stephen Johnson, Abby Watrous, Eszter Horanyi, Malinda Schaefer Zarske (This high school curriculum was originally created as a class project by engineering students in a Building Systems Program course at CU-Boulder.)MathematicsEcologyEngineeringForestry and AgricultureGeosciencePhysicsSpace ScienceTechnology2015-03-11T17:08:46.594701Course Related MaterialsPassive Solar Design
https://www.oercommons.org/courses/passive-solar-design
Students are introduced to passive solar design for buildings — an approach that uses the sun's energy and the surrounding climate to provide natural heating and cooling. They learn about some of the disadvantages of conventional heating and cooling and how engineers incorporate passive solar designs into our buildings for improved efficiency.Denise W. CarlsonIntegrated Teaching and Learning Program,Jonathan MacNeilMalinda Schaefer ZarskeTeachEngineering.orgEcologyEngineeringForestry and AgricultureGeosciencePhysicsSpace ScienceTechnologySocial Sciences2015-03-11T17:08:45.106684Course Related MaterialsPhotovoltaic Efficiency
https://www.oercommons.org/courses/photovoltaic-efficiency
Through a series of four lessons, students are introduced to many factors that affect the power output of photovoltaic (PV) solar panels. Factors such as the angle of the sun, panel temperature, specific circuit characteristics, and reflected radiation determine the efficiency of solar panels. These four lessons are paired with hands-on activities in which students design, build and test small photovoltaic systems. Students collect their own data, and examine different variables to determine their effects on the efficiency of PV panels to generate electrical power.Integrated Teaching and Learning Program,TeachEngineering.orgWilliam Surles, Abby Watrous, Jack Baum, Stephen Johnson, Eszter Horyani, Dr. Gregor Henze, Malinda Schaefer Zarske, Denise W. CarlsonEcologyEngineeringForestry and AgricultureGeosciencePhysicsSpace ScienceTechnology2015-03-11T17:08:38.945449Course Related MaterialsSolar Water: Heat it Up!
https://www.oercommons.org/courses/solar-water-heat-it-up
Students explore energy efficiency, focusing on renewable energy, by designing and building flat-plate solar water heaters. They apply their understanding of the three forms of heat transfer (conduction, convection and radiation), as well as how they relate to energy efficiency. They calculate the efficiency of the solar water heaters during initial and final tests and compare the efficiencies to those of models currently sold on the market (requiring some additional investigation by students). After comparing efficiencies, students explain how they would further improve their devices. Students learn about the trade-offs between efficiency and cost by calculating the total cost of their devices and evaluating cost per percent efficiency and per degree change of the water.Amanda GiulianiDarcie ChinnisIntegrated Teaching and Learning Program,Marissa H. ForbesOdessa GomezTeachEngineering.orgEcologyEngineeringForestry and AgricultureGeosciencePhysicsSpace ScienceTechnology2015-03-11T17:08:35.185447Course Related Materials