Globally we produce A LOT of #energy, but did you know the majority of fossil energy gets wasted? In the US alone, two-thirds of that energy is *wasted* as heat.
As Hannah Ritchie has pointed out, we don’t actually need to produce a low carbon equivalent of all of the coal, oil & gas we currently use.
That means we can decarbonize quickly by being less wasteful & more efficient. #ClimateChange #science
🇺🇦🇪🇺 cweickhmann
in reply to Sheril Kirshenbaum • • •Yes, ~60-70%-ish losses are normal in thermal generation processes due to the limits of the Carnot cycle. In cars (small machines, most of the time way off their max efficiency ranges) this goes way beyond 80%.
That's how EVs work even with the limitations of battery tech.
I am just wondering about the word "rejected". This sounds like energy, the grid is not capable of absorbing, like it is deliberately dumped. But, yeah, looking at the graph in total, it's just waste heat (they might as well have called it that).
DomFourtune ✅
in reply to Sheril Kirshenbaum • • •https://tunebook.fr/systener_collapso.html#2
Note : new release available on :
https://negawatt.org/Scenario-negaWatt-2022
Scénario négaWatt 2022
Association négaWattPaul Westbrook
in reply to Sheril Kirshenbaum • • •The Joy of Efficiency
joyofefficiency.comDr Rebecca Rooney
in reply to Sheril Kirshenbaum • • •YOGA~ZEN 🙏
in reply to Sheril Kirshenbaum • • •Lt. Commander Reggie
in reply to Sheril Kirshenbaum • • •Dr. Koala
in reply to Sheril Kirshenbaum • • •Hi Sheril, while it is true that over 2/3 (and sometimes over 3/4) of fuel energy is released as heat, this is an inescapable byproduct of thermodynamics.
A Carnot heat engine has a maximum efficiency of 1 only when the cold reservoir is at absolute zero (0K). We all know the feasibility of achieving that. The cold reservoir is frequently the ambient air temperature, which can be around 300K.
https://en.m.wikipedia.org/wiki/Carnot%27s_theorem_(thermodynamics)
principle regarding the maximum efficiency of heat engines
Contributors to Wikimedia projects (Wikimedia Foundation, Inc.)8r3nt gu14n0w5k1
in reply to Sheril Kirshenbaum • • •My understanding is that efficiency never turns into reduce consumption. In fact, it usually turns into increased consumption, as it makes formerly expensive applications become more scalable. Jevons Paradox:
https://en.wikipedia.org/wiki/Jevons_paradox
Admittedly I am no expert. I think we have to remember that energy use is part of a complex system, with non-linear feedback characteristics.
Our civilization has unbounded appetite for energy. If it exists, we will exploit it. We rarely leave it lie.
Economical paradox
Contributors to Wikimedia projects (Wikimedia Foundation, Inc.)Matt Ferrel
in reply to Sheril Kirshenbaum • • •Barry Goldman
in reply to Sheril Kirshenbaum • • •GaryO
in reply to Sheril Kirshenbaum • • •Paolo Redaelli
in reply to Sheril Kirshenbaum • • •Producing steel and cement require quite a lot of thermal energy. Ditto for aluminum recycling (refining instead is a game where electricity shines 😁).
Combined cycles achieve 50-60% efficiency Combined cycle power plant - https://en.wikipedia.org/wiki/Combined_cycle_power_plant
Please acknowledge that power grid transmission dissipate A LOT of power ~⅓-½ of the input…
type of power station
Contributors to Wikimedia projects (Wikimedia Foundation, Inc.)Paolo Redaelli
in reply to Sheril Kirshenbaum • • •The other is recycling the waste heat of industrial processes to heat homes (my city does exactly this)
Levend Gokce
in reply to Sheril Kirshenbaum • • •Steve8282
in reply to Sheril Kirshenbaum • • •Kevin Russell
in reply to Sheril Kirshenbaum • • •All use of carbon fuels is deadly waste. A filtghy history ending waste.
24 Billion trees. Twenty Four Billion Trees. With a "B"
Greenland will NO LONGER allow any search, drilling exploration for oil. Ever. Done.
India interrupted their new Five Year Plan to DROP ALL NEW COAL Spending, already budgeted.
The money will be spent on renewables.
Build ALL the new energy needed to END ALL CARBON FUELS FOREVER.
UN-used UN-needed UNderground.
Carbon fuels are death.
#Climate
SearingTruth
in reply to Sheril Kirshenbaum • • •"Tick, Tick
Fellow citizens, the truth is that our present can only be as stable as our future.
For too long we have hobbled from decade to decade, generation to generation, and millennium to millennium, myopically adhering to superfluous battles that can never be won. Never once as a species forwarding or embracing an all encompassing path towards a certainly better future.
Our excuses have been many, our reasoning mostly incoherent, and our lack of vision as a species, certainly fatal.
For in the meantime, as each tick of the ages has passed, the critical threats posed and ignored by our species discordance have increased exponentially.
Pandemic famine and disease, massively destructive weapons, fatal atmospheric and climate change, super volcanic eruptions, catastrophic space body impacts, Orwellian societies of unparalleled oppression, and many other global catastrophes too numerous to list here, waiting to befall us at any moment.
In fact, one of the most immediate and ominous threats facing America and much of the world today is the utiliz
... show more"Tick, Tick
Fellow citizens, the truth is that our present can only be as stable as our future.
For too long we have hobbled from decade to decade, generation to generation, and millennium to millennium, myopically adhering to superfluous battles that can never be won. Never once as a species forwarding or embracing an all encompassing path towards a certainly better future.
Our excuses have been many, our reasoning mostly incoherent, and our lack of vision as a species, certainly fatal.
For in the meantime, as each tick of the ages has passed, the critical threats posed and ignored by our species discordance have increased exponentially.
Pandemic famine and disease, massively destructive weapons, fatal atmospheric and climate change, super volcanic eruptions, catastrophic space body impacts, Orwellian societies of unparalleled oppression, and many other global catastrophes too numerous to list here, waiting to befall us at any moment.
In fact, one of the most immediate and ominous threats facing America and much of the world today is the utilization of advanced technologies for the implementation of authoritarian control over societies.
My friends, the truth is that if we do not fight for and secure freedom today, the time will very soon come when it will be almost impossible to do so.
In retrospect, when one soberly considers the critical challenges that we must face together to survive as a species, our differences, at times, can become almost imperceptible."
SearingTruth, A Future of the Brave, 2005