Rosenow explains current energy system wastes two-thirds as heat
1 Oct 31 3:13 PM · 7d ago · 1 article · 2 posts · 3 sources · development 1 of 1
Rosenow argues the current energy system is "astonishingly inefficient," wasting two-thirds of all energy inputs as heat. He explains how shifting to electrification at scale, including heat pumps and industrial heat batteries, could address this inefficiency.
“astonishingly inefficient," wasting two-thirds of all energy inputs as heat”
Professor Jan RosenowProfessor Jan Rosenow Professor of Energy and Climate Policy, Oxford UniversityRobert Llewellyn Host, Fully Charged podcast
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first by HN Best, 7d ago · also HN Frontpage
What people said 19 voices · best of 20 · verbatim
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> EVs are 4 - 5X efficientNot even close> Heatpumps are 4 - 5X efficientCompared to heating elements, possible, but that's cause heatpumps do not create heat, but move heat. They come with the disadvantage of being really slow, and would increase baseline load during nighttime.> Induction stoves are 4 - 5X efficient (vs gas stoves)Nope>…
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1) EVs are 4 - 5X efficient2) Heatpumps are 4 - 5X efficient3) Induction stoves are 4 - 5X efficient (vs gas stoves)Transportation, heating and cooling, cooking are all 4 - 5X efficient.Centralized power generation with fossil fuels loses ~75% (67% wasted up front, remaining in transmission and distribution).There are many many other losses and…
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I understand the heat pumps and EV part, but how is induction stove so much more efficient than gas stove?Sure you're putting the heat directly into the pot, OK I get that part. But a gas stove doesn't waste 80+% of the energy to the house. And any pot on an induction stove will also heat up and lose some energy to the house as well. Induction…
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I use gas for stovetop cooking, heat, and water heating (tankless). The demand charge for running an induction stove at dinner would be around $36. The an electric tankless water heater would be around $72. An electric furnace would cost $180. If those run at the same time (which may or may not be hard to control) the demand charge stacks.My…
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That video friggin' radicalised me. It's SO unbelievably goddamned stupid that we don't invest everything in what is essentially free energy that will last for decades right now. It solves SO many problems, and even removes a few of the biggest objections people have to AI datacenters. The tech is there, it's mature, and it would make all of our…
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The “Urban mining” part is the most underrated part of the electrification. Few journalists or commentators get the importance of the recycling industry for batteries. First on the geopolitical side, it means that once need are covered, material can stay in the same region, so no continuous dependance to extracting regions. Second, if we manage to…
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I only now got around to watching the Technology Connections video on renewable energy, I wish I had seen it sooner. Almost feels like it should be required viewing. I definitely thought there were nastier chemicals/compounds in solar panels and hadn't updated my knowledge on them in decades.
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I decarbonized my 125 year old home this summer. Cold winters here, using mini split heat pumps now for heat. Previously had oil, and 90 years ago it would have used coal. Love thinking this will be the first winter this house ever had where dirty exhaust wont be going up the chimney to keep it warm.
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About five years ago, I swapped my gas domestic hot water to a heat pump unit and my electric bill actually went down. Just being able to patch and insulate the roof exhaust from the gas unit saved more in spaced conditioning than the added (but minimal) electric load from the new heat pump itself.
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Globally, we barely use any energy. What we need is to do is solve geoengineering and cooling the planet so we can use much MORE energy.No matter how efficient we get we won't be able to offer future generations a better quality of life if we don't use more.
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What kind of article shows you a newsletter pop-up as soon as you load the page? That virtually guarantees not a single person would ever enter their information because they haven't even had a single second's chance to make any sort of determination yet.
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I swapped my hvac for an electric heat pump. My energy usage went down. Because electricity is way too expensive and I’m okay sweating a bit in the summers and wearing jackets indoors in the winters.
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The anti-renewables misinformation seems high in some places of the world.Can I ask if you are in the US?It seems better in the EU where a lot of people happily embraced residential solar
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The defense budget spend will continue with nuclear, storage, transmission, and solar sites.I hope a case could be made that there is less supply chain to defend though at a lower cost.
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There never were nasty chemicals in silicon PV. It's not that you needed to update formerly correct information, it's that you've been lied to for decades.
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For the energy transition , making renewables , RELIABLE ( at large scale) for a country is the very challenging part.
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> defense budget to protect oil infraIf there were no oil, the defense budget would likely be the same.
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No more bitcoin cryptocurrency and will solve this issue. it has been wasting electric energy.
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Misleading phrasing of the point, maybe “electrification could double energy efficiency”
All 1 developments of Oxford energy researcher says electrification could halve… →
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