A look at destatis tells me something else for Germany (in 2024): Solar has a share of 15 %, and wind 28 %. In total 57 % of the produced energy comes from renewable sources. (https://www.destatis.de/DE/Themen/Branchen-Unternehmen/Energ...)

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ZeroGravitas 3 days ago | parent | next [-]

They are trying to switch the conversation from electricity where renewables are making unmistakably swift progress, to all energy (e.g. gas for heat in homes and factories and oil for cars and trucks).

They think the horrific inefficiency of fossil fuels in these uses makes progress look slow and futile as it massively inflates the total energy usage.

In reality, once we get the easy bits of renewable electricity done and are at 80% carbon free electricity, these other markets let us avoid the hard part of getting to 100% clean energy but still make rapid progress on decarbonisation.

An EV or heat pump running on mostly clean energy is a 5 or 6x improvement in carbon even before you account for the grid benefits of having such a large amount of battery and heat storage attached to the grid.

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newyankee 2 days ago | parent [-]

I really want to see a heat pump being used to make a real world high temperature process more efficient and cut natural gas use by 40% or so, this might destroy the latest talking point

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pzo 2 days ago | parent [-]

the problem with heat pump is require quite well isolated building to make it efficient. Also after talking with a friend he had to change all radiators in his parents home since it didn't work well with previous old one he had.

I'm also not sure if heat pump is a solution for multifamily apartments.

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tcfhgj 2 days ago | parent | next [-]

> the problem with heat pump is require quite well isolated building to make it efficient. Also after talking with a friend he had to change all radiators in his parents home since it didn't work well with previous old one he had.

no, it doesn't require good isolation. Good isolation is beneficial, like for type of heating.

Radiators don't have an effect on isolation. However, modern radiators usually have a way higher surface area, which allows heating rooms with lower water temperature.

Heat pumps are more efficient if the difference between source and target temperature is closer.

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pfdietz a day ago | parent | prev [-]

I wonder what the nuclear alternative is... a reactor in each building?

Nuclear heating of such buildings would use heat pumps too.

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mpweiher a day ago | parent [-]

1. Nuclear district heating.

2. Just electric heating, if electricity is cheap enough. Very simple and cheap.

But yeah, heat pumps make that more efficient. At significant higher investment costs. Gotta do the math of whether it is more efficient overall to invest in an efficient energy producer (nuclear), efficient consumers (heat pumps) or both.

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pfdietz a day ago | parent [-]

Using resistive heating with nuclear electricity would be very foolish, unless you have a money wasting fetish.

Nuclear district heating would be very difficult to retrofit.

	▲	mpweiher 19 hours ago \| parent [-]
		> Using resistive heating with nuclear electricity would be very foolish, unless you have a money wasting fetish. Hmm. "... if electricity is cheap enough." > Nuclear district heating would be very difficult to retrofit. Who said anything about retrofitting? Just build district heating nuclear plants. https://www.linkedin.com/posts/sollid_denmark-to-investigate... Again, building one nuclear plant is expensive. But building tens or hundreds of thousands of heat pumps is certainly also and likely even more expensive.

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tomatocracy 3 days ago | parent | prev | next [-]

I think you're looking at electricity here, not energy. Energy is much more than electricity.

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2 days ago | parent | prev [-]

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