A Permaculturist’s Guide to Thinking About Energy presented by Toby Hemenway
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- เผยแพร่เมื่อ 8 ส.ค. 2024
- Learn more at www.permaculturevoices.com/146
Backing Away from the Energy Cliff: A Permaculturist's Guide to Thinking About Energy.
Fossil fuels are the underpinning of our civilization, and our desperate attempts to keep cheap oil flowing runs the risk of collapsing ecosystems and cultures. This lecture uses a permacultural approach to evaluate energy sources and to design possible energy futures.
Presented by Toby Hemenway at PV1 in March 2014.
Watch some of the videos from PV3 at: www.permaculturevoices.com/product/pv3-the-video-package/ - วิทยาศาสตร์และเทคโนโลยี
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Toby will be greatly missed! His work will live on. Thank you Diego for posting this.
God damn. Crushing to hear him opening with "Looking forward to many more years". RIP brother Toby.
Diego, thank you for capturing this incredible talk. Toby was a giant of a human being and I'm so thankful you two connected when you did. The world is a much better place because of the work you both did. This talk should be required viewing for all physics and engineering students, and actually for all humans, around the globe. Really inspiring and really important concepts to grasp. Thank you again for sharing. And may Toby rest in peace. We will carry the torch for you Toby that you lit so bright for the world to see. I will miss your warm and kind spirit. Peace.
Toby is probably back, coming in with the intent to continue his work!
Diego, your dedication this week to Toby Hemenway has been very successful. Now I am missing someone I didn't know to miss before! What a great speaker he was!!!
Thanks Robert.
That man was a great human mind and spirit!
incredibly useful and very easy to understand, thanks for sharing
Thanks, Diego! Happy new year everyone!
I'm really into this energy question. I don't have the money or oportunity to install greener energy systems myself but recently, i have joined a very unique energy cooperative which is basically a sort of ebay for energy. They have the usual suspects of green energy, solar, wind, biomass and no grey energy except natural gass, which is actually harder to make sustainable than liquid fuel, at least that's what i understood. It's a gridbound matchmaking system with small and large producers and customers. I can choose my energy farmer who might just have one single windmill or an array of solar panels on the barns and the gass has green compensation projects all over the world.
What's so cool about it is that new energy projects of any type or scale can just be slotted into this system so if better sources emerge later, they can just plug them in, no matter the scale. Of course there are still huge problems with materials and manufacturing fuel cost, logistics, ore, etc. but this is the best there is at the moment and i'm supporting it so it can grow. Liquid fuel for me has become unaffordable already as it is already twice as expensive in Europe than the rest of the world. I don't use it anymore.
The only solution for me personally is conservation, conservation, conservation because this is where the actual progress can be made so we can stall the process of decline a bit longer but that's about all i see for the future. The honest truth is that cooking will be done on electricity in my future instead of gass but that doesn't fix my home heating yet as i can't install wood heating in this rental. I'm there part of the way. That counts too. After being on this subject for well, well over a year, i don't see any real viable solutions anywhere. They're all patches.
I don't see how we can keep this standard of living, complexion or wealth up for very long. It is all evaporating at an allarming rate, especially for the bottom half of the population of which i am definitely a part and it's hitting us like a freight train. I don't mind it. My life as an experiment sounds fine to me. I don't even mind discussing the 'population issue'. I saw this trainwreck coming decades ago and decided on no kids. I think it's the best thing i can do for the world. You may disagree with me but i'm not that way religiously inclined to care about anyones opinion on my personal life.
Where's the graph of number of people killed per gallon of gasoline in the social costs section?
There's a Stanford U Report from 2012, claiming the EROI for PV was 12.5
RIP Toby
Ivanpah is water boiling,,,not salt, you can’t do solar thermal on a roof top in this scale, Tomapah in Central Nevada is one that uses Salt. It has just an ne tower
but didnt we have captured energy in form of oil and gas, which was stored over thousends of years of sunlight hitting earth plants? cant we use those energyreserves to build the solar pannels who will repay over time? (i mean in the sahara no plant biomass can caputre the sunlight bec there is no water) hasnt desertec a theoretical chance to success?
Hannes Günther Rationing fossil fuels to extend the time we have to scale renewable could help short term but go back and listen to the point about how much GDP and raw materials solar and wind need. Those big wind turbines have to be replaced frequently (20 years if I recall correctly) and they use a lot of copper, fiberglass, and concrete. It's still zero sum on the raw materials at some point (unless we can scrounge enough power to mine asteroids but talk about a crazy transformity power suck!).
It's also going back to a more diffuse power source so the scale of the raw material needs is increased greatly.
Things like figuring out fusion or scaling the waste fuel nuclear options are more likely to be able to provide enough return on power input to make the techno fantasy continued ascent of the logarithmic peak viable.
@@umaikakudo no thank you on nukular
Photovoltaics lol
Well this depressing
This lecture, for me at least is highly flawed. It's assumptions and means of measurement and statistics especially in regard to renewable energy where too much is of the reductionist principle.
I'd agree with that. The transformity for photovoltaics is a good example, since photovoltaics should have better and better transformity factor as their lifespan increases, since production is just a one-time cost for each PV cell but his math suggests that this one-time production cost is being factored into the annual costs. Certainly more rigorous analysis needs to be done.
On the other hand, I think he was just trying to give a really basic & rough idea of how to even start conceptualizing and quantifying these things so that we can even start moving towards more rigorous analyses in the first place. If you have any resources that address these topics in more detail I'd be very interested to check them out!
Yes this is the 2nd talk by this guy where i thought he was being a reductionist/oversimplifying. Red meat for his audience though