Blue Energy, also known as salinity gradient power, is a renewable energy technology that generates electricity by exploiting the natural energy created when freshwater mixes with saltwater. This phenomenon typically occurs in estuaries where rivers meet the sea. Blue Energy is considered a clean and sustainable source of power.
How Blue Energy Works:
1. Pressure Retarded Osmosis (PRO):
Freshwater and saltwater are separated by a semi-permeable membrane.
Freshwater moves through the membrane into the saltwater due to osmotic pressure.
The pressure difference is harnessed to drive turbines and produce electricity.
2. Reverse Electrodialysis (RED):
Uses multiple layers of membranes to separate salt ions (positive and negative) in saltwater.
The movement of ions generates an electrical current.
Advantages of Blue Energy:
Renewable: It uses an endless supply of freshwater and saltwater.
Eco-friendly: Produces no greenhouse gas emissions.
Consistent: Energy production is continuous, unlike solar or wind power.
Applications:
Blue Energy has great potential in coastal regions and can complement other renewable energy sources, contributing to a susta
inable energy mix for the future.
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