01 How It Works
Tidal range energy uses the height difference between high and low tides, funneled through turbines in a barrage or lagoon. Tidal stream energy uses underwater turbines in fast-flowing tidal channels - like underwater wind turbines. Wave energy converters oscillate with wave motion, driving hydraulic pumps or direct generators. The ocean holds enormous untapped energy - the global wave resource alone exceeds current world electricity demand.
02 Pros & Cons
โ Advantages
- Highly predictable
- High energy density of water
- No fuel cost
- Low visual impact (underwater)
โ ๏ธ Disadvantages
- Very early stage
- Marine environment challenges
- High installation costs
- Limited suitable locations
03 Future Outlook
Tidal stream arrays (like MeyGen in Scotland) are proving commercial viability. Advanced materials and AI-optimized designs are cutting costs. Combined tidal + offshore wind farms may share grid connections and reduce infrastructure costs. The predictability of tidal power makes it uniquely valuable for grid planning compared to solar and wind.
04 Fun Fact
The La Rance tidal barrage in France, built in 1966, still generates 240 MW and was the world's first commercial tidal plant.