Energi panas bumi 2.0: Solusi energi bersih atau risiko baru? | @DWPlanetA

Summary

The video explores the potential of geothermal energy, highlighting Iceland's successful use of geothermal power and the groundbreaking advancements in geothermal technology. It explains how deep drilling into Earth's crust can harness massive amounts of heat, even in areas without natural hot water reserves. New technologies, like Eavor's closed-loop system and Fervo Energy's innovative horizontal drilling, promise to make geothermal energy accessible globally. However, challenges like high costs, water usage, and potential seismic risks remain. With the right investments and regulations, geothermal could supply up to 15% of the world’s electricity by 2050, providing a sustainable alternative to fossil fuels.

Takeaways

• 🌍 Iceland successfully utilizes geothermal energy, with about two-thirds of its primary energy coming from renewable geothermal sources.
• 🔥 Conventional geothermal energy relies on underground hot water reservoirs, typically found at depths between a few hundred to 3,000 meters.
• ⚙️ Next-generation geothermal technologies (Geothermal 2.0) aim to access heat from dry rock, making geothermal energy available almost anywhere.
• 🌡️ Temperature increases by about 25–30°C per kilometer underground, meaning deeper drilling can unlock significantly more energy.
• 🗺️ At depths of 4,000 to 7,000 meters, geothermal energy potential expands globally and could theoretically supply up to 150 times current global electricity demand.
• 🔄 Closed-loop systems like Eavor’s ‘Eavor-Loop’ circulate water through underground pipes without needing natural water reservoirs, reducing environmental risks.
• 🏗️ Companies like Eavor and Fervo Energy are pioneering advanced geothermal systems using technologies adapted from oil and gas drilling, including horizontal drilling and fracking techniques.
• 💧 Some geothermal methods require large amounts of water and can induce seismic activity (earthquakes), raising environmental and safety concerns.
• ⚠️ Induced earthquakes, such as the 5.4 magnitude event in Pohang, South Korea (2017), highlight the risks of certain geothermal techniques.
• 💰 High drilling costs are a major barrier, making geothermal energy currently more expensive than solar and wind without subsidies.
• 🤝 The geothermal industry heavily relies on expertise and technology from the fossil fuel sector, with many workers and methods transitioning from oil and gas.
• 🏛️ Government support, regulation, and large-scale investment (estimated at $1 trillion over 10 years) are crucial to scaling geothermal energy globally.
• 🌱 If costs decrease and safety improves, geothermal energy could supply at least 15% of global electricity by 2050.
• 🌏 Key future markets for geothermal expansion include China, the United States, and India, which together hold about 75% of global potential.
• 🔋 Advanced geothermal could provide stable, continuous clean energy and complement intermittent renewables like solar and wind.

Q & A

What is geothermal energy and how is it utilized in Iceland?

Geothermal energy is heat derived from the Earth's interior. In Iceland, it provides two-thirds of primary energy needs by drilling into underground hot water reservoirs and using the heat for electricity and heating.

Why is conventional geothermal energy limited in its application worldwide?

Conventional geothermal energy relies on underground hot water reservoirs, which are only present in certain regions, limiting its widespread applicability.

What is the main advantage of next-generation geothermal technologies?

Next-generation geothermal technologies, like Eavor's closed-loop system, can extract heat from dry rocks and very deep layers, making geothermal energy accessible in regions without natural hot water reservoirs.

How does the Eavor Everloop system work?

The system drills two vertical wells connected by lateral horizontal wells. Water circulates through the loop, absorbs heat from hot rocks, and returns to the surface for use in heating or electricity generation.

What role does Google play in geothermal energy development?

Google has partnered with Fervo Energy to develop a new type of geothermal installation in Nevada to power its data centers, emphasizing the need for large-scale renewable energy.

What are some environmental risks associated with enhanced geothermal systems?

Enhanced geothermal methods that fracture rocks to circulate water can trigger small earthquakes, as seen in the 2017 Pohang earthquake in South Korea, and may cause public concern.

Why is geothermal energy currently expensive compared to solar and wind energy?

High costs arise from deep drilling (up to 10,000 meters) and complex technology, making geothermal several times more expensive than solar or wind without subsidies.

How are fossil fuel industry methods being adapted for geothermal energy?

Technologies like fracking and deep drilling, originally developed for oil and gas, are being adapted for enhanced geothermal systems to increase efficiency and energy extraction.

Which countries are considered most promising for next-generation geothermal development?

China, the United States, and India hold about three-quarters of the global geothermal potential and are seen as the most promising regions for expansion.

What financial and regulatory support is necessary for geothermal development?

Subsidies, insurance, debt systems, and supportive regulations help mitigate risks and cover the high initial costs of geothermal projects, as seen in Europe and the US.

How much of global electricity could next-generation geothermal energy cover by 2050?

If technology progresses safely and costs decrease, next-generation geothermal energy could provide at least 15% of global electricity, with deeper drilling potentially yielding even more.

What is the long-term business potential of advanced geothermal systems?

Advanced geothermal can become a sustainable energy business model, using familiar drilling methods while avoiding fossil fuel extraction, and supporting a transition to clean energy.