Tidal stream turbines do the same thing underwater using tidal flows instead of the wind. This turns a generator, producing electricity. One end of the turbine blade is connected to the hub of the rotor, so the lift force on the blades causes them to rotate. Wind turbines use the wind blowing over their blades to create a lift force, behaving like an aeroplane wing. Tidal stream turbines work in a similar way to wind turbines – they even look alike. Pentland Firth strait separates the Orkney Islands from Caithness in the north of Scotland. There’s another way of generating clean energy that the UK has so far failed to exploit: tidal stream power. But how can a fully net-zero grid guarantee electricity when the wind drops again in the future? Established energy sources such as offshore wind will play a big role in decarbonising the economy and slowing climate change. Planned and unplanned outages of nuclear power plus high demand for natural gas compounded the problem, resulting in network operators restarting coal power stations and energy companies raising prices.Īs hosts of COP26 in Glasgow – the 26th UN climate change summit – the UK has framed the negotiations as a chance to show that “science and innovation can deliver climate solutions”. To meet this daunting target without relying on fossil fuels, the government is betting big on wind power – one of the cheapest forms of renewable power available.īut in August and September 2021, calm weather caused wind energy generation to drop 60% below the seasonal average. The UK’s annual electricity demand is expected to more than double by 2050.
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