Big contributor: An employee inspects control panels at a booster substation of Repsol Valdesolar solar park in Badajoz, Spain. The first commercial solar projects were built in the early 1980s, but are now making a huge impact on the global energy supply. — Bloomberg
WASHINGTON: Shell Plc recently published two energy security scenarios, its latest in a long series of thorough and (at least to energy analysts) memorable views into energy’s possible futures.
The first, called Archipelagos, is an extension of the world’s current path. The second, Sky 2050, works backward from an idealised outcome of net-zero emissions and a limited global temperature increase.
Notably, the Sky 2050 scenario sees high oil prices incentivising demand reduction.
That’s something that prospect countries, which are already grappling with rising inflation, may face in the coming months after the Organisation of the Petroleum Exporting Countries and its allies decision over the weekend to cut oil output.
The report is packed with charts and projections, but there is one historical chart worth exploring in detail.
Shell examined the four major energy technologies to emerge in the past six decades – nuclear power, liquefied natural gas (LNG), solar power and wind power.
Each technology needed years before it made a meaningful, if minor, contribution to the global energy supply, a threshold Shell sets at one exajoule annually. (One exajoule is equivalent to 277 terawatt hours, which is close to the amount of electricity Mexico consumed in 2019.)
For example, the first grid-connected nuclear power plant began operation in the Soviet Union in 1954, and nuclear power reached one exajoule of global supply 19 years later.
Solar took more than three decades to contribute an exajoule of supply, with the first commercial solar projects built in the early 1980s and the first exajoule not reached until 2016. A technology’s speed after it hits the milestone is more important than its speed before.
Nuclear power doubled in the four years after, then doubled again within another five years. It now supplies more than eight times as much energy as it did 50 years ago.
Liquefied natural gas had a slower start, taking nearly a decade to go from one exajoule to two, and the same amount of time again to go from two to fout.
Its progress leapt ahead in the late 2000s, nearly two decades after it supplied its first annual exajoule. But it still provides less energy than nuclear power today.
Wind power is growing more rapidly than LNG. Both took decades to reach their first exajoule, but wind has grown at a faster pace than LNG since then.
Wind was on an almost identical path to nuclear power. But it has accelerated and now supplies nearly 30% more energy in its 14th year past the milestone than nuclear did.
Solar is on its own path. A year after hitting the milestone, exceeded nuclear’s supply at the same stage. In its seventh year as a significant energy supplier, solar accounted for almost one-and-a-half times as much energy as nuclear. It supplied nearly two-and-a-half times as much energy as LNG six years post-exajoule.
This is a striking finding, and it is also promising for decarbonising global energy, with one major distinction worth noting.
Global energy consumption has more than doubled in the 50 years since nuclear energy reached the one exajoule mark.
In 1973, the world consumed 238 exajoules of energy, in 2021, it consumed 595, according to the latest BP Statistical Review.
That means that in the year that nuclear energy first appeared as a significant energy contributor, it supplied about 0.4% of the energy the world used.
By the time that LNG hit an exajoule, it provided about 0.3%. By 2016, when solar provided its first exajoule, it met less than 0.2% of the much-increased global energy demand. — Bloomberg
