RonPMexico t1_iqsxcmg wrote on October 2, 2022 at 9:17 PM

Reply to comment by invisiblesock in The US's largest ever combined wind+solar/battery electricity plant has opened in Oregon with a generating/storage capacity of 350MW/120MWh by lughnasadh

Not really peaker plants use tried and true generation techniques and are just as efficient as main load plants. Our current grid provides reliable, consistent, and constant electricity.

invisiblesock t1_iqt32y2 wrote on October 2, 2022 at 9:55 PM

🙄

today's grids contain large amounts of capacity that's seldom used. this includes peaker plants, which have terrible efficiency.

RonPMexico t1_iqt4252 wrote on October 2, 2022 at 10:01 PM

I would argue the excess capacity is exclusively made up of peaker plants. I'd be interested in where you got the terrible efficiency data from.

invisiblesock t1_iqxngj8 wrote on October 3, 2022 at 9:06 PM

>I'd be interested in where you got the terrible efficiency data from.

most peaker plants use single cycle gas turbines, which have fairly low efficiency. it's usually in the low 30s for newer plants depending if the plant has heat exchangers to cool the incoming air.

there are also peaker plants that use reciprocating engines, these ones have even worse efficiency.

standard combined cycle gas thermal plants have a second cycle that uses the waste heat from the first cycle to increase the efficiency; in this case it's between 40% and 60%.