What is a Petajoule?

What is a Petajoule?

One petajoule (PJ) explained.

The joule is the standard unit of energy in general scientific applications. One joule is the equivalent of one watt of power radiated or dissipated for one second.

One petajoule is 1015 joules (1 million billion) or 278 gigawatt hours.

  • 19000

    The energy used by 19,000 homes in a year1

  • 868000

    The electricity used by 868,000 refrigerators in a year2

  • 2354000

    The electricity used by 2,354,000 televisions in a year3

  1. The average home uses approximately 50 gigajoules of energy in 2014–15
  2. A typical 2.5 star fridge uses 320 kWh of electricity per year 3
  3. A 50 inch 5 star label television uses 320 kWh of electricity per year

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Geothermal

Why Geothermal?

“Just 1% of the hot rock energy less than 5 km under the surface would be enough to meet Australia’s entire power needs for 26,000 years if it was tapped.”

- Reuters 2008

Geothermal energy utilises the most abundant energy source in the universe, the earth’s core, which has more fuel than the sun. The process involves injecting liquid through wells into geothermal reservoirs where high-temperature rocks sit.

The rocks create steam which is used to generate electricity through a generator connected to a turbine, with the remaining steam converted into hydrogen via an electrolyser.

Unlike wind and solar, geothermal power is the first renewable solution that can be used as a 24/7 baseload power source.

Studies have shown that if we can get access to just one per cent of the hot rock energy less than 5km under the surface, we could meet Australia’s entire power needs for 26,000 years.

For this reason, experts predict geothermal production methods will revolutionise the energy industry and be critical to delivering a cost-effective avenue to decarbonising the global economy.

Benefits of Geothermal Energy

  • One of the cheapest sources of electricity.

  • The most affordable sources of green hydrogen.

  • Hydrogen production has the lowest negative environmental impacts.

  • Operates 24/7, which means entire energy grids can depend on it.

Geothermal energy is the ultimate renewable energy source


1

Predictable power output.

Geothermal energy is accessible as base load
power (unlike wind and solar) – meaning it is a
24/7, 365 day a year renewable energy option.

2

Resistant to ambient weather conditions.

Geothermal energy is not dependant on variable sun or wind conditions.

3

Minimal land footprint.

Steam Resources' proposed pilot plant will have an estimated ground footprint of just 1.1km2.

4

Small decommissioning costs

Due ot the smaller footprint and reduced operational complexity compared to legacy oil and gas processing plants.

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