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Solar Is Cheapest Electricity in History, U.S. DOE Aims to Cut Costs 60% by 2030

(cleantechnica.com)
131 points mg | 7 comments | 26 Mar 21 20:07 UTC | HN request time: 0.002s | source | bottom
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Manfredo_1 ◴[27 Mar 21 02:35 UTC] No.26599379[source]▶
That "manipulation of hydrogen" mostly involves use in the the chemical industry. We don't use hydrogen to power gas turbines.

I'm not sure why you're trying to deny the existence of chemical facts: https://www.twi-global.com/technical-knowledge/faqs/what-is-....

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Hypx ◴[27 Mar 21 03:07 UTC] No.26599563[source]▶
Are you familiar with fuel gases? https://en.wikipedia.org/wiki/History_of_manufactured_fuel_g...

Burning hydrogen gas (blended with other gases) for heat or power has been around for a long time.

> I'm not sure why you're trying to deny the existence of chemical facts

You're projecting here.

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Manfredo_1 ◴[27 Mar 21 03:23 UTC] No.26599639[source]▶
That link you provided doesn't encompass gas turbines. Gas turbines capable of burning hydrogen do exist, but only at smaller concentrations, 70% methane and 30% hydrogen or less.
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Hypx ◴[27 Mar 21 03:31 UTC] No.26599683[source]▶
In addition to what I said in the other post regarding gas turbines, you also don't need a gas turbine to generate power. As long as you can boil water the rest follows logically.

Honestly, you should learn some thermodynamics and chemistry before accusing others of being ignorant.

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Manfredo_1 ◴[27 Mar 21 03:33 UTC] No.26599690{3}[source]▶
Right, but then we're not talking about combined-cycle gas turbines to convert hydrogen back into electricity. If we're going to boil water than that's much less efficient than the ~66% efficiency we get out of combined cycle gas turbines.

Also, in case you weren't aware a combined cycle turbine also involves boiling water and spinning a turbine. The reason why they're so efficient is because energy is extracted both from the gas turbine (basically a jet engine) and a steam turbine driven by the heat from the exhaust from the gas turbine.

>Honestly, you should learn some thermodynamics and chemistry before accusing others of being ignorant.

Hydrogen embrittlement is a real thing, don't just go hand-waving it away: https://www.energy.gov/sites/prod/files/2014/03/f12/hpwgw_em...

What about thermodynamics am I missing?

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1. Hypx ◴[27 Mar 21 03:47 UTC] No.26599747{4}[source]▶
So now you're arguing that anything less than ~60% efficiency is unacceptable? Even for emergency backup or long-term power storage reasons?

You're at multiple layers of denial at this point. It's time to admit you were wrong.

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2. Manfredo_1 ◴[27 Mar 21 03:50 UTC] No.26599759[source]▶
Sure, we could burn hydrogen and drive a boiler like a coal plant. But that's not where this comment thread started.

> Those gas turbines you're referring to can simply be modified natural gas gas turbines

Sure, if you just want to run them for a short period of time and generate a lot more wear. If these turbines are so simple to modify, why does GE say that it won't be until 2045 that their turbines will be able to run 100% hydrogen gas?

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3. Hypx ◴[27 Mar 21 03:59 UTC] No.26599796[source]▶
Then repurpose old coal plants for the same reason. None of this needs to be hard.

This whole debate started when you were caught making ignorant statements regarding basic chemistry and thermodynamics. You're not going to win by just doubling on everything or moving goalposts. It's past time to admit you were wrong.

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4. Manfredo_1 ◴[27 Mar 21 04:03 UTC] No.26599815{3}[source]▶
If we aren't using combined cycle gas turbines round-trip efficiency of hydrogen storage is seriously reduced.

I'm not moving any goalpost. This is your comment when you claimed that gas turbines could be repurposed to burn hydrogen: https://news.ycombinator.com/item?id=26599162

> Those gas turbines you're referring to can simply be modified natural gas gas turbines.

> It's past time to admit you were wrong.

Follow your own advice. You can't just feed a gas turbine hydrogen and run it as normal. Existing gas turbine manufacturers don't plant to offer 100% hydrogen gas turbines for decades.

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5. Hypx ◴[27 Mar 21 04:19 UTC] No.26599869{4}[source]▶
It's almost endearing how far someone can shove their head up their own asshole and still keep shoving...
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6. ◴[27 Mar 21 04:30 UTC] No.26599918{5}[source]▶
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7. dang ◴[30 Mar 21 01:11 UTC] No.26630283{5}[source]▶
You repeatedly, outrageously violated HN's rules in this thread. I've pretty much seen it all here and even I was shocked. However wrong someone else is or you feel they are, you absolutely cannot post like this on this site.

Although both of you were at fault, your comments were so aggressive and vicious that I've banned your account. If you don't want to be banned, you're welcome to email hn@ycombinator.com and give us reason to believe that you'll follow the rules in the future. They're here: https://news.ycombinator.com/newsguidelines.html.