Tidal Lagoon Harmonic Scheduler: Understanding Tidal Power Generation

What a Tidal Lagoon Is

A tidal lagoon is an artificial barrier built in the sea or along a coastline that captures the energy of incoming and outgoing tides. The lagoon's design allows it to store water during high tide, which can then be released through turbines to generate electricity.

The key to efficient tidal power generation lies in understanding the complex interplay between gravitational forces from the Moon and Sun, known as tidal harmonics.

Tidal Harmonics and Their Impact

The M2 (Mare tide) harmonic is caused by the Moon's gravitational pull on Earth’s oceans, while the S2 (Solar tide) comes from the Sun. Together, these harmonics create a spring-neap cycle, where high tides are higher and low tides lower than average.

By adjusting the strength of these harmonics through the simulation controls, you can observe how they influence the water levels in your lagoon, which is crucial for optimizing energy production.

Tidal Power Generation Strategies

There are three main strategies for generating power from a tidal lagoon: ebb generation (using falling tide), flood generation (using rising tide), and two-way generation (utilizing both tides). Each strategy has its own advantages and challenges.

The choice of strategy depends on the specific conditions of your lagoon, such as the size of the basin, the strength of tidal currents, and the capacity of your turbines.

Orifice-Flow and Hydro-Power Equations

The power generated from a tidal lagoon is determined by the flow rate through the orifices in the turbine blades. The Orifice-flow equation, Q = A * v, where Q is the volumetric flow rate, A is the cross-sectional area of the orifice, and v is the velocity of water passing through it, plays a critical role.

Hydro-power generation also depends on the head (the vertical distance between the high and low tide levels) and can be calculated using the hydro-power equation, P = ρ * g * Q * H, where P is power, ρ is the density of water, g is gravitational acceleration, Q is flow rate, and H is head.

Frequently asked questions

Try it live

Everything above runs in your browser — open Tidal Lagoon Harmonic Scheduler and change the parameters while it is running. Nothing is installed, nothing is uploaded, the whole model lives in one tab.