Solar Power Plants
Solar power plants, also known as solar farms or solar parks, are facilities that generate electricity by harnessing the energy from sunlight. These power plants utilize photovoltaic (PV) or concentrated solar power (CSP) technologies to convert solar radiation into electrical energy. Here's an overview of solar power plants:
Photovoltaic (PV) Solar Power Plants: PV solar power plants use solar panels made of semiconductor materials, typically silicon, to directly convert sunlight into electricity. The solar panels consist of numerous solar cells connected in series and parallel to produce the desired voltage and current. PV power plants can range from small-scale installations on rooftops to large-scale utility-grade facilities.
They offer several advantages, including:
- In large-scale PV power plants, thousands or even millions of solar panels are arranged in arrays over a significant land area. The panels are tilted at an optimal angle to maximize solar exposure and are equipped with tracking systems that follow the sun's path throughout the day for improved efficiency. The generated electricity is fed into an inverter, which converts the DC (direct current) electricity from the solar panels into AC (alternating current) electricity compatible with the electrical grid.
- Concentrated Solar Power (CSP) Plants: CSP solar power plants use mirrors or lenses to concentrate sunlight onto a receiver, which absorbs the solar energy and converts it into heat. The heat is then used to generate steam, which drives a turbine connected to a generator to produce electricity. CSP plants are commonly used in large-scale utility applications.
- There are different types of CSP technologies, including parabolic trough systems, power tower systems, and dish/engine systems. Parabolic trough systems use curved mirrors to focus sunlight onto a receiver tube, while power tower systems employ an array of mirrors to direct sunlight towards a central receiver. Dish/engine systems use a parabolic dish to concentrate sunlight onto a receiver located at the focal point.