In Worldwide Energy Mix, we look at how different countries use a number of energy sources in their energy mix to provide heating, electricity and transport.
This energy mix can be judged on the country’s energy trilemma score…
The higher the country scores in each area, the better their energy mix.
ICELAND’S ENERGY MIX
Iceland is a bit of a success story when it comes to its energy mix. As little as 40 years ago, the island was a developing country, dependent on fossil fuels to meet its electricity, heating and transport needs.
Today, Iceland can boast that it is the only country that generates 100% of its electricity and 95% of its heating from renewable energy sources.
Luckily, it sits in a perfect position to benefit from some of Earth’s natural resources; geothermal and hydro energy. Let’s find out more!
Hydro and geothermal energy make up all the country’s electricity needs, while geothermal energy is used straight from the ground to heat 95% of homes and water on the island.
There may be no need to worry about security of energy sources for Iceland, as according to geologists, there is a lot more potential for the island’s geothermal and hydro energy for years to come. Currently, the country has only used around 20-25% of their available hydropower, and only 20% of their available geothermal energy.
Transport, on the other hand, is still all down to oil, and Iceland’s oil reserves are not very big; they rely heavily on imports from other countries. Iceland is looking at other sources of energy. For example biofuel, electric cars and hydrogen cells to power cars and buses
Unfortunately, even though Iceland has so much natural resource, it’s currently too difficult to sell on the extra amount of energy that they don’t use to other countries. If they could do this then their energy mix might be more secure. Iceland believes that if they were able to export their spare energy, that the island could power the whole of the northern hemisphere! That’s the whole top section of earth that you see on a world map!
That’s why Iceland is currently looking into building an extremely long cable (interconnector) to the UK , so that we can benefit from all that clean extra electrical energy. However, it is difficult transporting electricity thousands of miles.
Iceland sits on the mid-Atlantic ridge, a sort of crack in the earth, where two sections of earth deep, deep underwater (tectonic plates), slightly overlap to create friction, and occasionally, volcanic eruptions and earthquakes.
While sometimes being dangerous, Iceland’s placement actually benefits from natural and renewable geothermal energy, that can be accessed both deep underground, as well as much nearer the surface; for example, geysers.
Both the hydro power and geothermal energy Iceland has to use are found all over the island, so there are no real issues with accessing either. These sources provide a clean, highly accessible and affordable source of energy for the whole population.
However, there are always costs involved with building hydro power and geothermal power stations for electricity as well as the infrastructure needed to use the heat from the earth straight into homes in order to heat spaces and water.
To get to the underground heat, there are a number of options, most of which involve drilling underground; the differences come from how far underground the drills go.
For tap water, both hot and cold, holes are drilled as low as 200m to as deep as 2000m, in order to release steam from the island’s natural heat pools. This steam then rises to turn turbines, which pumps up water which is then distributed to homes and businesses nearby.
This means that hot water is available whenever needed, rather than using energy to heat it on demand. For cold, clean drinking water, the water from underground is simply cleaned and cooled and again comes straight out of the tap.
There are two sides to the cleanliness of Iceland’s energy mix; on the one hand, renewable geothermal and hydro energy are covering all the electricity and heating needs of the island. Even swimming pools are heated by geothermal energy! However transport, including large fishing ships, which are extremely important to a remote island like Iceland, is still reliant on oil and petrol.
The population of Iceland is only 300,000 people, however because of all its cars, buses and ships the island has one of the highest levels of greenhouse gas emissions (which contribute to global warming) per person in Europe!
The island is moving towards higher use of their natural resources in areas like manufacturing and agriculture, which in the UK is a large user of fossil fuels. So to swap this out for renewable clean energy is a positive step, and will help reduce Iceland’s CO2 emissions even more.