Allam Cycle with High Tower for Water Condensing

I think you are onto something here, that cannot possibly work.

The phrase, "pump it skyward a long way up - maybe 20,000 feet", should be preceded by, "then a miracle happens" and it is pumped skyward maybe 20,000 feet.

How do you pump LCO2 20,000 feet up in any appreciable quantity?

A PD pump is about the only way to go.

20,000 ft head on a dense fluid as this, I don't even know of a pipe that could hold it. That would be one high pressure. I guess the answer is that it would have to be pumped very carefully. LOL

Let's bring this thing back down to earth, and put the condenser coil outside at ground level somewhere that the RH% is say 40%. That means that reaching dew point might not be too hard, as the LCO2 expands. I am not even saying one has to do the whole product stream this way. Maybe this is not even all that large of a stream considering that methane is 75% carbon, and the heat rate on this cycle starts off really low (high efficiency). Addled brain from lack of sleep hours.

Water out of thin air, is not far-fetched when there is little to no water available...not that we have that problem here at this time.

You can pretend to do anything when you're high in acronym heaven and unconstrained by pressure-temperature relationships.

Thank you, I will have two lumps. OK, drop it back to ground level. The moisture content of air might be higher there anyway.

What I should have said: install a stabilized vortex machine on the air-cooled condensers to add that extra power boost (even if it's only 5-10% of the plant, that pays off a lot of auxiliary power). I have seen claims for these type of cooling towers (where wind power is captured on the induced wind speed) to enhance power plant output by up to 30% of maximum nominal load.

Obviously, it can't all that great on plants with already low heat rate, it would just blow up the Laws of Thermodynamics. In fact, the tacking on of extra water production would have to be at the cost to the power company in terms of raising the heat rate (Total BTU's/kWh). That is the bottom line, no ifs, no buts.

It just depends on how desperate the community nearby is for this water.

No smoke and mirrors, to antimatter antigravity liftitrons. Just air mass flow and density imbalances, clean combustion cycle, novel gas turbine operating in closed cycle.

The Allam cycle is anything but "normal" but it does work because it is a closed cycle where all process parameters are well controlled.

But what happens when you "open it up" to the atmosphere at a substantial height, and then have to collect it and the additional water vapor before it is repressurized for injection into the pipeline? First you have to build a 3.5mile high stack (an engineering feat in itself), second move it up there, third you have to collect it, fourth you have to compress it for injection, fifth the pipeline has to accept the additional water, and sixth and most importantly the pipeline has to have the capacity to accept and deliver on a continuous basis monstrous quantities of CO2. If it can't then the process has to stop because the back pressure will increase since there's no place for the CO2 to go. Good luck.

So, what I hear you saying is that the new Allam cycle unit in La Porte, TX is well-controlled. I have no idea, but was wondering how forgiving the control bands are for the firing/power output curve? It may be a very linear plant?

I have about decided to listen to everyone's advice on the high altitude bit, and forget it. I never meant to imply to open the cycle at high altitude or any altitude, just allow heat exchange is all, another shroud tube would be needed to collect condensate and transfer it down. You are totally right about no way to cycle this refrigerant aloft....at least that I can see right now, without an impossible structure, and impossible machinery operating on God knows what up there.

Since it is customary in these parts to excuse oneself for farting, please excuse my brain flatulence.

We won't count that against your lifetime greenhouse gas emission limit

Hey! Over there! You wanna bag that gas? Who's bag daddy is that anyway?

Happy Weekend. Stick a fork in me, I am done.