A combined-cycle gas turbine burns natural gas once but extracts electricity in two stages: first from a gas turbine, then from a steam turbine powered by the hot exhaust the first turbine was about to throw away. That simple act of refusing to waste heat is why CCGTs can reach efficiencies around 60%—and why they still matter in a power system filling up with wind, solar, and batteries.
A heat pump can deliver three or four units of heat while using roughly one unit of electricity. No, it is not breaking physics. The trick is that it does not create most of the heat—it moves heat that was already there. Here is why your refrigerator, air conditioner, and one of the biggest technologies in building decarbonization are basically members of the same family.
Michael Faraday started life binding other people's books and ended up discovering the principle behind the generators that power modern civilization. No university degree. Very little mathematics. Quite a lot of electricity.
Energy intensity measures how much energy an economy uses to produce a unit of economic output. A falling number can signal efficiency, electrification, or structural change—but it can also fool you. Here is how to read one of the energy world’s most useful ratios without asking it to tell you more than it knows.
A power system can have more installed capacity than peak demand and still face electricity shortages. Resource adequacy asks the question that actually matters: will enough generation, storage, imports, and flexible demand be available when the system needs them most?
Primary energy is where we start counting energy before it is transformed, refined, converted, or delivered to consumers. Sounds simple—until wind, solar, nuclear, gasoline, and electricity enter the room.