Underground Heat Storage in Västerås

What was the original purpose of the caves in Västerås during the Cold War?

• To store oil

• To house underground laboratories

• To store food supplies

• To serve as a military bunker

What is the primary reason for keeping the location of the caves secret?

• To protect wildlife

• To avoid environmental damage

• To prevent theft

• To maintain energy security

What percentage of homes in Västerås are connected to the district heating system?

• 50%

• 100%

• 75%

• 98%

What is the main advantage of a cogeneration plant compared to a normal power plant?

• It uses less fuel

• It requires no maintenance

• It produces only electricity

• It produces both electricity and heat

How long did it take to fill the caves with water for the heat storage project?

• One year

• Five months

• Three months

• Two months

How much CO2 emissions can the heat storage system in Västerås save annually?

• 2,000 tons

• 1,600 tons

• 4,000 tons

• 3,000 tons

What is the main benefit of using the caves as a heat battery?

• It lowers water consumption

• It reduces the need for fossil fuels

• It increases electricity production

• It provides a tourist attraction

Which country is planning a heat storage project three times bigger than Västerås?

• Germany

• Denmark

• Norway

• Finland

What type of bedrock is ideal for creating large rock caverns for heat storage?

• Metamorphic

• Igneous

• Crystalline

• Sedimentary

What is one alternative method of heat storage mentioned in the video?

• Installing geothermal pumps

• Building wind turbines

• Using solar panels

• Heating natural underground layers