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Why Hydrogen Sucks As A Fuel


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2020 Sep 26, 11:19am   614 views  5 comments

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1   thenuttyneutron   2020 Sep 26, 12:33pm  

“More energy is needed to isolate hydrogen from natural compounds than can ever be recovered from its use,” Bossel explains to PhysOrg.com.

No shit! It is called the 2nd law of thermodynamics. I wonder if this guy looked at the oil inputs into making "renewables"?

What is the recover rate on energy from fossil fuels compared to the energy input from the ancient sun that was used to make them? That has not stopped us from using them.

I have always said that a H2 based economy requires the use of nuclear power. It is the only thing that can give us the large amounts of energy required for making a H2 economy work. These morons keep thinking we can pull a magic trick and get around entropy. Physics does not care about the environmentalist's bellyaching, bitching, or their "feelings". You will either submit to reality and accept entropy or you will only waste energy fighting entropy and end up making the situation worst. You have to accept that massive amounts of energy is going to get wasted because physics requires it!

Pick your poison. Live within the energy budget of the sun or find alternate sources of energy. Fossil fuels was the easy choice and raised our standard of living. I can only imagine how many years it took to make what we burn in 1 single year. We can also scale up nuclear power now with breeder reactor designs. Fusion power is only 50 years away sarc. Maybe one day we will figure fusion out. Renewable energy ,simply put, is an extremely inefficient way of converting the nuclear fusion energy of our sun into electricity. Why is he not bellyaching about that?

The efficiency of a heat engine can be increased by having a larger temperature difference between the heat source and the heat rejection site. This can only go so far as you reach the limits of the materials that the heat engine is made of. Most nuke plants today use the Rankine cycle and they are limited to about 35% efficiency. Using the Brayton cycle on a molten salt reactor design would allow us to get to about 60% efficiency.
2   rocketjoe79   2020 Sep 26, 1:02pm  

All Nuclear power uses a steam loop to boil water to drive a turbine, with efficiency losses. One day we'll have more efficient Magnetohydronamic plasma to electricity conversion and lose the steam loop. One day.

Combined cycle plants are pretty efficient.
https://en.wikipedia.org/wiki/Combined_cycle_power_plant#Efficiency_of_CCGT_plants
3   Bd6r   2020 Sep 26, 1:55pm  

thenuttyneutron says
I wonder if this guy looked at the oil inputs into making "renewables"?

The energetics is less than "fantastic", conservatively speaking.

https://www.sciencedaily.com/releases/2005/03/050329132436.htm

Ethanol Production Consumes Six Units Of Energy To Produce Just One

Original paper: Natural Resources Research, Vol. 14:1, 65-76.
4   rocketjoe79   2020 Sep 26, 2:06pm  

Ethanol is Payola to ADM and other corn producers. And California, with has shut down 2 more refineries in NorCal in the last month, with the intention to shut down all 4 soon. They're being converted to Biodiesel. That means a shedload of corn (or processed corn byproducts, like alcohols) that gets converted to Biodiesel. The transport costs alone are ridiculous in terms of efficiency!! Another "green new deal" type effort that is a complete waste of resources.
5   komputodo   2020 Sep 26, 2:24pm  

thenuttyneutron says
No shit! It is called the 2nd law of thermodynamics. I wonder if this guy looked at the oil inputs into making "renewables"?

You are not supposed to talk about that...you must be a TRUMP supporter.

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