Lesson 1: Energy and Power

Transcription

1 Student Name: Unit 5: Design Lesson 1: Energy and Power File 5.1.3: Wind Power Design Brief Background: You and your friends wish to build a club house in a secluded spot with no electricity. The group has decided to build a windmill to provide electricity for lighting. Since everyone has a different idea what the windmill should look like, small scale prototypes will be built and tested. You learned in your technology education class that an electric motor can be connected to a battery to supply mechanical energy. During your study of electric motors, you discovered that if mechanical energy were supplied to spin the motor you would generate a small amount of electricity. Design Problem: Design and build a wind mill that will generate enough electricity to light an LED. Specifications: 1. The prototype will be built to a scale of 1:10 2. The windmill must produce an output voltage to power an LED. 3. The designers must create an energy flow diagram of the windmill system. 4. The builders must measure the voltage output with a voltmeter. Deliverables: 1. Each student must complete an Engineering Design Folio documenting the process. The design folio must include an energy flow diagram of the windmill system showing the voltage output of the system. 2. Each team must submit a prototype of a wind mill. 3. Each student must submit a learning objective summary for the project. This rubric will be used to evaluate your extension activity: Category Below Average Average Excellent Defining a Problem Rephrases the problem with limited clarity. Rephrases the problem clearly. Rephrases the problem clearly and precisely. Brainstorming Contributes few or Contributes a plausible Contributes multiple implausible ideas. idea. plausible ideas. Researching and Generating ideas Contributes ideas, but without documented research. Produces incomplete sketches. Does not present a concept. Contributes one plausible idea based on documented research. Produces marginally accurate pictorial and orthographic sketches of design concepts. Contributes multiple plausible ideas based on documented research. Produces accurate pictorial and orthographic sketches of design concepts.

2 Identifying Criteria and Specifying Constraints Exploring Possibilities Selecting an Approach Developing a Design Proposal Making a Model or Prototype Testing and Evaluating the Design using Specifications Refining the Design Creating or Making it Communicating Processes and Results PowerPoint Specifications Does not restate the criteria clearly and fails to identify constraints. Inadequately analyzes the pluses and minuses of a variety of possible solutions. Selection of solution is not based on consideration of criteria and constraints. Design proposal is inadequate and lacking pertinent information. Prototype meets the task criteria to a limited extent. Testing and evaluation processes are inadequate. Refinement based on testing and evaluation is not evident. Restates the criteria clearly and identifies several constraints. Satisfactorily analyzes the pluses and minuses of a variety of possible solutions. Selects a promising solution based on criteria and constraints. Restates the criteria clearly and precisely and identifies many constraints. Thoroughly analyzes the pluses and minuses of a variety of possible solutions. Selects a promising solution based on a thorough analysis criteria and constraints. Design proposal is Design proposal is adequate, containing accurate and all pertinent elements. comprehensive. Prototype meets the task criteria. Testing and evaluation processes are adequate for refining the problem solution. Refinements made based on testing and evaluation results. Finished solution Finished solution (product) fails to meet (product) meets specifications. specifications. Solution presented with limited accuracy. Limited supporting evidence on how the solution meets the task criteria. PowerPoint includes all steps of the design process. The solution is missing more than one of the required specifications listed in the design brief. Solution presented accurately. Some supporting evidence on how the solution meets the task criteria. Prototype meets the task criteria in insightful ways. Testing processes are innovative. Significant improvement in the design is made based on prototype testing and evaluation. Finished solution (product) exceeds specifications. Solution presented concisely with clarity and accuracy. Extensive supporting evidence on how the solution meets the task criteria. PowerPoint includes all PowerPoint includes all steps of the design process and explains the designed solution. The solution meets all but one of the required specifications listed in the design brief. steps of the design process and fully explains the designed solution, including material/equipment recommendations and images. The solution meets all of the required specifications listed in the design brief.

3 Learning Objective Summary Learning objective summary (one page maximum) indicates student unrelated knowledge related to the design challenge. Learning objective summary (one page maximum) indicates student knowledge related to standards addressed in the design challenge. Learning objective summary (one page maximum) indicates student in depth knowledge related to standards addressed in the design challenge. Standards Addressed: For your learning objective summary, explain each standard using supporting details you learned from the lesson. o Energy cannot be created nor destroyed; however, it can be converted from one form to another. (STL-16J) o Energy can be grouped in to major forms: thermal, radiant, electrical mechanical, chemical, nuclear, and others. (STL-16K) Windmill specifications rubric Category Below Average Average Excellent a model that is much a model that is built a model that is built Scale of 1:10 larger or much smaller than a 1:10 scale to an approximate scale of 1:10 to an exact scale of 1:10 Power an LED. Energy flow diagram Measure the voltage output a model where the LED bulb does not light an inaccurate and incomplete energy flow diagram The student measures the voltage output on a volt meter but does not know what the readings mean a model where the LED bulb flickers an accurate energy flow diagram The student measures the voltage output on a volt meter a model where the LED bulb lights brightly and constantly an accurate and complete energy flow diagram The student measures the voltage output on a volt meter and explains what the readings mean

4 Name Date Started Engineering Design Process Folio Group Members Due Date 1. Define the Problem What need or want must be met by the solution? 2. Brainstorming In the space provided, sketch three possible solutions to the given problem. Remember to be creative! 2012 International Technology and Engineering Educators Association Foundations of Technology, Third Edition/

5 3. Research and Generating Ideas In the space below, document your research. Be sure to include proper citations at the end of your notes. Notes: Citations/References:

6 4. Identifying criteria and specifying constraints What are the criteria and constraints? Materials List 5. Exploring possibilities Reflect on your brainstorm ideas and research notes. Generate any additional designs which you feel meet the criteria and constraints in the space below.

7 6. Selecting an Approach a. Enter the constraints of the project in the first column. b. Score each sketch for each constraint. + = 3 pts., =2 pts., - = 1 pt. c. Total the columns and circle the highest score. Constraint Sketch 1 Sketch 2 Sketch 3 Total 7. Developing a Design Proposal Take your highest scoring sketch and create working drawings (sketches with dimensions, so that you could build your project). Attach your working drawings to this sheet.

8 8. Making a model or prototype In the space below, document (using digital pictures) your construction of the model/prototype and/or include your CAD drawings to scale. Be sure to include a picture of the final model/prototype.

9 9. Testing and Evaluating the Design, using specifications As you create your solution, you will perform tests to make sure that the solution is meeting the needs of the given problem. If you solution does not work, you may need to repeat the previous steps of the Engineering Design Process, until you find a functional design. In the space below, document the type of test you conducted and the results. Test Performed Test Results Math Application (Measurement): One method of evaluating an electrical system is to measure voltage across an electrical device, in this case, the motor/generator. Your teacher will show you how to set and read the voltmeter. Voltmeters have different settings to make it easier to read the voltage. Indicate the voltage output of your windmill in the space below: Voltage output of the windmill: 10.Refining the Design Based on your tests, propose refinements to the design and construction of the design problem in the space below. 11.Creating or Making It If time allows, modify your model/prototype as proposed in refining the design. What additional steps would be necessary to produce this solution for mass market production?

10 12.Communicating processes and results Prepare a PowerPoint presentation depicting your design process and your final solution. the PowerPoint to your instructor or present it in class. 13.Communicating processes and results Insert your energy flow diagram in the space below: