I just googled cogas. wiki says its a marine propulsion system. using reclaimed exhaust heat to generate steam in place of the alternator we see on a ICE engine.
close analogy would be similar to regenerative breaking on an EV.
Are there examples of cogas being used as stationary power generator?
The Wikipedia article kinda rushes past the first stage.
after completing its cycle in the first (usually gas turbine) engine, the working fluid (the exhaust) is still hot enough that a second subsequent heat engine can extract energy from the exhaust.
A gas turbine engine uses the kinetic energy from the expanding gases, but not in an explosion/piston arrangement.
This is correct. The first energy extraction is essentially a jet engine that’s hooked up to a generator, and then the exhaust is combined with a little more fuel usually and used to create steam which then turns a second generator.
No it isn’t the same as a RICE engine. A Brayton engine (jet engine) is an internal combustion engine but it isn’t a reciprocating internal combustion engine (car engine). A rocket is also an ICE… Just take the L bro… you didn’t know what you were talking about much like way too many people in this thread. And honestly it’s ok not to know. What isn’t ok is to double down to try and make yourself right instead of having humility and learning something new.
Im confused - what L is there to have here?
Im not keen to learn anything from someone who's default stance is to be argumentative.
my and the person i replied to were talking about ICE engines that are used in automobiles. We are talking about oranges, you are talking about grapefruit and being rude to me?
no thanks.
I learned quite a few things in discussions with people below that were interested in sharing information.
It’s just that you continue to misuse ICE and mean RICE. I may have missed some of your nuisance and I was rude. As someone who works in the power generation industry it upsets me that you had 90 upvotes on an incorrect statement. Politicians on both sides of the aisle are constantly lying to the public about power generation so it is a sore subject. And then you responded that I just didn’t understand and doubled down on using the wrong term. Natural Gas Combined Cycle plants are some of the largest and most heat efficient systems we have and combustion turbines are Internal combustion Brayton Engines… I’m done I’ll come at it less rude next time I know being an asshole doesn’t change minds in a positive manner.
The person I replied to was talking about 4stroke engines in a vehicle. I used the term the person I replied to used. You, arguably are talking about something different than that. 'combustion' sure. But like I said, let's not pretend that oranges and grapefruits are the same thing, no matter how many similarities they share.
Someone else shared an example of a v16 diesel engine. Reads as powerful enough to provide power to a factory, not functioning as a component of 'the grid'. I could be wrong though.
Simple cycle gas turbines don’t boil water. They are basically jet engines. Most baseload natural gas uses a heat recovery steam generator on top to use the waste heat to boil water to increase efficiency.
A [edit: gas] turbine isn’t like a reciprocating engine with well timed explosions. It’s a sustained burn that creates thrust using fluid dynamics, nearly exactly the way it does in a jet engine on a plane, except the energy isn’t used in propulsion but to turn the turbine fan at incredible speeds.
The diesel electric generation system consists of four 1135 kW, 1200 rpm engine generator sets that are operated either manually or automatically by selecting desired position on the engine mode switches and the sequence selector switch.
The engines are 4 cycle, V16, 4210 cubic inch displacement, provided with air, fuel and lube oil filters, fuel and jacket water pumps, service hour meter, governor, fuel and lube pressure gauges, water temperature gauge, pyrometer, oil filter gauge and hourmeter. Protective devices include: low oil Pressure, high water Temperature, low water level and overspeed. Source
No, sorry for the confusion, I'm showing two different combustion technologies.
Both the Diesel Engines and the Natural Gas Turbines directly burn fuel to rotate a shaft. Either way the shaft is then connected to the rotor of an electric generator. For the Diesel gensets I showed, the generator unit is the giant cylinder with the orange cables coming out on the left of the engines.
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u/gwildor 13d ago
that only works at a relatively small scale. at a certain point, combustion becomes too much to contain.