Over 90% of the worldâs electricity comes from heat-generating power plants using coal, natural gas, nuclear energy, and concentrated solar energy. Steam turbines have always been the standard for converting that heat into electricity. On average they are only 35% efficient, with moving parts that cannot cope with temperatures above 2,000 degrees Celsius. Jennifer Chu at MIT describes new research, in collaboration with NREL, that has led to a … [Read more...]
China should comfortably meet its 2030 Renewables target. But its emissions?
The long Covid lockdown seems to have had little effect on Chinaâs electricity generation growth. In 2021, total generation increased by about 750 TWh (thatâs around 1.3 times Germany's absolute total). Solar PV capacity grew by 53 GW last year (equal to the total installed solar capacity in Germany). Half of all offshore wind turbines installed worldwide in 2021 were off the coast of China: the strong additions were accelerated by the January … [Read more...]
Intelligent, flexible Sector Coupling in cities can double the potential for Wind and Solar
This week the European Commission tabled the Energy Performance of Buildings Directive (EPBD) which should accelerate the decarbonisation of buildings. Buildings and cities play a key role in the energy transition. And the target high shares of variable renewable power supply will be much more easily achieved if the sectors using them display demand flexibility. In essence, that means using or storing the excess wind and solar generation … [Read more...]
Nuclear-Wind hybrid plants for grid stability, Power-to-X and more
How would you use a nuclear-wind hybrid plant and maximise its potential? When intermittent windâs output falls, nuclear can step in to feed the grid. When itâs not doing that it can use its power to run the production of a wide range of commodities: from biofuels, hydrogen, pumped hydro to wastewater purification, desalination, chemical manufacturing and more â including straightforward thermal power for industry. In collaboration with NREL, the … [Read more...]
Chinaâs 2019 electricity generation reviewed as its next 5-year plan is drafted
Simon Göss breaks down the totals and additions for electricity generation in China. In 2019 the total reached 7,325 TWh (more than twice Europeâs) after adding 330 TWh (more than half Germanyâs total). Of that 330 TWh, 120 TWh came from thermal (90%+ coal). But the numbers were dominated by renewables (hydro, wind, solar) which added almost 160 TWh. Though thatâs the third year of declining renewables additions, wind and solar curtailment is … [Read more...]
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