TECH8016 - Lab1_RETScreen_MS-Word_Version

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Conestoga College *

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8161

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Electrical Engineering

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Feb 20, 2024

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Laboratory Manual TECH8016: Photovoltaic Grid Design Lab 1 – RETScreen Site Analysis

Table of Contents Contents Table of Contents .................................................................................................................................. 1 Lab 1: Study and analysis of PV configurations using RETScreen ........................................................... 2 Objective ........................................................................................................................................... 2 Apparatus .......................................................................................................................................... 2 Required Preparation ........................................................................................................................ 2 Procedures ......................................................................................................................................... 2 Task 1: Calculate the annual solar radiation (MWh/m2) on a horizontal surface .......................... 2 Task 2: Find the optimum tilt angle of a fixed PV array at which the annual solar radiation is maximum, and the PV array is facing due south ............................................................................ 3 Task 3. Utilizing the methodology used in previous tasks, answer the following questions: ......... 3 Expected Outcomes ........................................................................................................................... 5 Report Submission Instructions ......................................................................................................... 5 Photovoltaic Grid Design and Installation Lab Manual Page 1 of 5

Lab 1: Study and analysis of PV configurations using RETScreen Objective Determine the solar energy resource and the expected annual energy production at a given location utilizing RETScreen software. Apparatus  RETScreen software Required Preparation Select a location where you would like to perform this analysis, and determine the GPS coordinates for that location. Site Location: Procedures Task 1: Calculate the annual solar radiation (MWh/m 2 ) on a horizontal surface Step 1: Open RETScreen and click on “Feasibility”, under analysis type Step 2: Select a location for your facility Step 3: Note down the “Daily solar radiation – horizontal” column in the chart to determine the average daily insolation on a horizontal surface at your site location. Using this value, determine the total annual solar radiation (or insolation) on a horizontal surface at your site location. Photovoltaic Grid Design and Installation Lab Manual Page 2 of 5 Record the annual solar radiation on a horizontal surface:

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Task 2: Find the optimum tilt angle of a fixed PV array at which the annual solar radiation is maximum, and the PV array is facing due south Step 1: Click on “Go to: Facility” at bottom of page Step 2: Select Power Plant, and Photovoltaic for “Facility type” and “Type”. Fill in the fields for “Facility Information”. Step 3: Click on “Go to: Energy” at bottom of page Step 4: Click on “Power” button along top bar, and add “Photovoltaic”. Select “Level 2” in the fields that show up. Step 5: Under “Resource Assessment”, set “Solar tracking mode” to “Fixed”, and “Azimuth” to 0. For the “Slope”, you will try different values until you find one that yields your maximum annual solar radiation (or insolation) in MWh/m 2 . In order to see the maximum annual solar radiation, click on “Show Data” to display the monthly table, along with annual values. Task 3. Utilizing the methodology used in previous tasks, answer the following questions: Question 1: Calculate the annual solar radiation (MWh/m 2 ) at an optimum tilt angle of a fixed PV system facing 30° west of due south. What is the new optimum tilt angle? What is the maximum solar radiation? How do these results compare with the results from the previous task, when the system is facing south? Photovoltaic Grid Design and Installation Lab Manual Page 3 of 5 Record the optimum tilt angle, and the maximum annual solar radiation: Answer:

Question 2: Find the optimum tilt angle of a fixed PV array at which the solar radiation for summer months (June, July, August) is maximum and the PV array is facing due south. Record the tilt angle, and the total annual solar insolation at this angle. Next, find the optimum tilt angle of a fixed PV array at which the solar radiation for winter months (December, January, February) is maximum and the PV array is facing due south. Record this tilt angle, and the associated total annual solar insolation as well. Compare and discuss these two results. Question 3: Calculate the annual solar radiation for a tracked (one axis, two axis and azimuth) PV system under the following conditions: i) one axis tracking with PV array tilt angle of the latitude of your site ii) two axis tracking iii) azimuth tracking with optimum PV array tilt angle Compare and discuss these results Photovoltaic Grid Design and Installation Lab Manual Page 4 of 5 Answer: Answer:

Question 4: Determine the PV system capacity factor, and the total electricity exported to the grid under the following conditions:  Fixed panels (no tracking)  Optimum tilt angle for maximum annual solar insolation  Azimuth = 0  Using 20 x Helios mono-Si 6T 250W panels  Ignoring bifacial cell adjustment factor (set at 0%)  Miscellaneous losses (under PV category) of 6%  Inverter efficiency of 97%  Inverter capacity of 5kW  Ignoring miscellaneous losses (under Inverter category) (set at 0%) Expected Outcomes By following the procedures listed above you should have observed the effect of tilt angles, azimuth angles, and tracking systems on the total amount of insolation that can be captured by a PV system, as well as how some these factors can have different impacts on insolation during the different seasons. Report Submission Instructions Submit your lab report on eConestoga under Lab 1 assignment. Your report for this lab is due at 11:30p.m. Thursday evening in week 4. While you may discuss with others how to approach the assignments, the work you submit must be your own. Please note that your submissions will be checked for originality by Turnitin. Submitting an unoriginal work and plagiarism is an academic offence that will not be tolerated. A range of penalties may be applied based on whether it is a first or subsequent offence and on the severity from a grade deduction to suspension from the College. Please review the College's Academic Integrity Policy for more information. Photovoltaic Grid Design and Installation Lab Manual Page 5 of 5 Answer:

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