EE 1106 Lab 9
EE 1106 Lab 9 EE 1106 - 001
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This 7 page Bundle was uploaded by Kumar Jyoti on Sunday January 3, 2016. The Bundle belongs to EE 1106 - 001 at University of Texas at Arlington taught by Gregory K Turner in Fall 2015. Since its upload, it has received 154 views. For similar materials see ELECTRICAL ENGINEERING FRESHMAN PRACTICUM in Electrical Engineering at University of Texas at Arlington.
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Date Created: 01/03/16
EE1106 – Introduction to Electrical Engineering Practicum Lab Report Grading Rubric (To be attached as a coversheet to EVERY report) FORMATTING (see comments in graded report for more explanation): Formatting Evaluation Key (Lab 1, 2, 3, 4): 0 = Absent 1 = Extremely Lacking 2 = Poor 3 = Fair 4 = Good 5 = Excellent Formatting Evaluation Key (Lab 5 and all succeeding labs): 0 = Extremely Lacking 1 = Poor 2 = Fair 3 = Good 4 = Excellent 5 = Perfect Primary Structure: _____ Proper margins/spacing is used throughout the report (IEEE format) _____ Proper formatting of section titles and subtitles (IEEE format) _____ Proper font and font size (IEEE format) _____ Overall consistency of formatting throughout the report Figures/Tables: _____ Figures/tables are appropriately named and numbered (IEEE format) _____ Figures/tables are appropriately sized and spaced _____ Screenshots are neatly cropped and clear Spelling, Grammar, and Writing Style: _____ Spelling _____ Passive voice is used throughout the ENTIRE report _____ Sentence Structure _____ Paragraph Structure (IEEE format) _____ References (IEEE Format) CONTENT (see comments in graded report for more explanation): Content Evaluation Key: 0 = Absent 1 = Extremely Lacking 1 2 = Poor 3 = Fair 4 = Good 5 = Excellent _____ Abstract provides endtoend coverage of the objectives and purpose of the lab experiment _____ Introduction demonstrates a working understanding of major theoretical concepts required for the experiment _____ Procedure is sufficiently detailed and clearly describes all steps taken during the lab experiment _____ Results are sufficiently detailed and data is neatly organized _____ Discussion is a thoughtful analysis of all experimental results and data _____ Discussion demonstrates a working understanding of the purpose of the experiment performed _____ Conclusion sums up the overall accomplishments of the experiment _____ Conclusion sums up the benefits (to the student) of performing the experiment 2 Lab Report 9 Solar Panel IV Characteristics Kumar Aman Jyoti Electrical Engineering University of Texas at Arlington Arlington, Texas Kumar.email@example.com Solar panels use the photovoltaic effect to convert light energ y directly into electricity. Often times a solar panel is charact erized by its I‐V curve and P‐V curve. Abstract: This paper is about learning the I‐V plot of the provided solar panel and also the P‐V plot of the provided solar panel. We will also calculate the maximum power delivered by In electronics, the relationship between the direct current the solar panel and learned how efficiently the provided solar (DC) through an electronic device and the DC voltage across its terminals is called a current–voltage characteristic of the panel converts light energy into electricity by using NI My DAQ, Resistors, a solar panel, Female Barrel Connector and other instruments. Device. Electronic engineers use these charts to determine I. INTRODUCTION basic parameters of a device and to model its behavior in an Solar Panel refers to a panel designed to absorb the sun's rays as a source of energy for generating electricity or heating. Electrical circuit. These characteristics are also known as IV curves, referring to the standard symbols for current and A photovoltaic (in short PV) module is a packaged, voltage. connected assembly of typically 6×10 solar cells. Solar Photovoltaic panels constitute the solar array of a photovoltaic system that generates and supplies solar electricity in commercial and residential applications. Each module is rated by its DC output power under standard test conditions, and typically ranges from 100 to 365 watts. The efficiency of a module determines the area of a module given the same rated output – an 8% efficient 230 watt module will have twice the area of a 16% efficient 230 watt module. There are a few solar panels available that are exceeding 19% efficiency. A single solar module can produce only a limited amount of power; most installations contain multiple modules. A photovoltaic system typically includes a panel or an array of solar modules, a solar inverter, and sometimes a battery and/or solar tracker and interconnection wiring. 3 Fig 2 : Solar Panel Schematic Once the circuit was constructed and connected to my My DAQ, we opened up LabVIEW and created a blank VI. After that we placed a DAQ Assistant and wrote the Spreadsheet Fig 1 A picture of solar panel in Lab File block in my workspace as shown in Figure 3 below. II. PROCEDURE First of all we measured the resistance of RS using the DMM Fig 3: The VI Block Diagram feature of my My DAQ and recorded it. After that we measured the trim pot so that we know how it works and which terminal leads are capable of sweeping from 0 Ohms to 1k Ohms. Next, we connected the solar panel to the trim pot and current sensing resistor as shown in Figure 2 below. After making our circuit was constructed, we connected our My DAQ to the circuit. It is to be noted that the AIxx designations are connected to the analog inputs on my My DAQ. Fig 4: Using the Solar Panel 4 We configured the DAQ Assistant to acquire an analog input voltage from channels ai0 and ai1 on my My DAQ. The acquisition mode was to be set to “N Samples” with 300 samples at 20Hz sampling rate. A 20 second timeout is needed so that the DAQ assistant will not throw an error while running the full 15 seconds. We connected the data output of the DAQ Assistant to the 2D Data input of the write to Spreadsheet File block. Data will come out of the DAQ assistant as two rows with 300 columns. Wired a true to the “Transpose” input so that the data will write as two columns of data with 300 rows. The format string “%.6f” will create floating point number data with six decimal places. A point Fig 5 IV Plot should be noted that we did not put any additional characters (especially spaces) in the format string. Finally, we connected a String constant block containing a comma to the delimiter input of the write to Spreadsheet File block. Now we collected data using the VI I have created. We swung the load potentiometer from one side to the other while your VI was running. We were sure to swing the potentiometer at a constant speed and completed its swing within the 15 seconds that the VI ran. Once the VI was completed, we were prompted to save the acquired data file. The data in the file is to be two columns by 300 rows. The first column is the load voltage and the second is the current sense resistor voltage. Then created a third row to calculate the load current from Fig 6 PV Plot the current sense voltage. Finally created a fourth column to calculate the load power from the load voltage and the load Note I have uploaded The Excel sheet with the Data. current. IV. DISCUSSION Using the solar panel and performing experiment with it we came to know that solar panel converts the light energy directly into electrical energy by a process called photovoltaic effect. We were able to draw the IV graph and also the PV graph with the values measured. We also calculated at what moment did the solar panel produced the maximum power and how did it behaved before and after Fig 3: Breadboard Circuit that. III. GRAPHS V. CONCLUSION After doing this lab we were able to learn that Solar panels use the photovoltaic effect to convert light energy directly 5 into electricity. Often times a solar panel is characterized by its I‐V curve and P‐V curve. In this lab experiment we determined the following information: The I‐V plot of the provided solar panel was constant for some time and then drastically fall down as you can see in the graph. The P‐V plot of the provided solar panel increases gradually and alter V. REFERENCES at a point started dropping. The maximum power delivered by the solar panel was observed after a moment when it  Lab 9 handout from Lab wiki page started falling down just after it reached its highest peak. 6
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