Chapter 5.2 Solar PV System Components1

Introduction to Renewable Energy Course Overview

  • Institution: University of Technology and Applied Sciences, Suhar

  • Course Title: Introduction to Renewable Energy

  • Course Code: EGRE 1230

  • Semester: SP2024 - AY 2024-2025

  • Pre-requisite: Nil

  • Co-requisite: Nil

  • Type of Course: Mandatory

  • Language of Instruction: English

  • Credit Hours: 3 (2 Theory + 2 Practical)

Course Content

  1. Energy Sources

    • Understand different sources of energy, their classification, storage, and conversion systems.

  2. Unit Conversion

    • Learn unit conversion for parameters involved in energy systems.

  3. Energy Concepts

    • Explore scope and concepts of conventional and non-conventional energy sources.

  4. Solar Energy

    • Estimate solar energy; applications and conversion techniques; principles involved in solar energy collection and conversion to electricity.

  5. Design of Solar PV System

    • Learn to design a solar PV system for domestic applications.

  6. Wind Energy

    • Identify wind energy as an alternative source and concepts of wind energy conversion systems.

  7. Wind Turbines

    • Study types of wind turbines and aerofoil shapes; composite material selection for turbine blades.

  8. Wind Power

    • Learn wind power coefficient and efficiency calculations.

  9. Biomass Energy

    • Understand utilization of biomass energy; types and concepts of thermochemical and biological methods.

  10. Geothermal and Ocean Energy

    • Utilization of geothermal energy and ocean energy; introduction to fuel cells.

  11. Fuel Cells

    • Understand types and working principles of fuel cells.

  12. Building Design

    • Distinguish between active and passive design at different building scales.

  13. Green Building Materials

    • Identify energy-efficient materials for green buildings.

  14. Standards and Certifications

    • Learn about green building standards and certification systems.

Main Components of a Solar Panel System

  • Key Components:

    1. Solar Panel

    2. Charge Controller

    3. Battery

    4. UPS/Inverter

    5. AC and DC Loads

  • System Overview: The solar panel collects sunlight, the charge controller regulates the voltage for battery charging, and the battery stores energy for power usage during non-sunny periods.

Solar Panel System Wiring

  • Wiring Components:

    • Junction Box, Solar Charger Controller, Batteries

  • Solar PV Connectors:

    • MC4 connectors are used for connecting solar modules in parallel or series. They are waterproof, ensuring system durability in outdoor settings.

Charge Controllers

  • Functionality:

    1. Regulate voltage suitable for charging batteries.

    2. Prevent excessive charging and reverse current at night.

    3. Monitor and display the status of batteries and PV panels.

  • Types:

    • PWM (Pulse Width Modulation): Adjusts charging rate by changing pulse width.

    • MPPT (Maximum Power Point Tracking): Adapts to maximum power output from solar panels.

Battery Systems and Types

  • Types of Batteries:

    • Lead-Acid: Commonly used; includes flooded and sealed types.

    • Nickel-Cadmium (NiCd): Used in specific applications.

    • Lithium Batteries: Best performance but expensive; zero maintenance.

  • Battery Characteristics: High efficiency, long lifecycle, and low self-discharge are essential for effective power storage.

Depth of Discharge (DOD) and State of Charge (SOC)

  • Definitions:

    • SOC: Amount of energy stored in a battery as a percentage of its total capacity.

    • DOD: Percentage of capacity withdrawn compared to fully charged capacity. Maintaining a DOD of 60-70% is crucial for battery longevity.

Temperature Effects on Batteries

  • Optimal Operating Temperature: Batteries perform best at 25-30 degrees Celsius. Extreme temperatures can reduce battery capacity.

Conclusion

  • Understanding renewable energy technologies is essential for engineers to develop sustainable systems. This course provides foundational knowledge across various renewable energy sources, including solar and wind energy systems.