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Old 04-25-2020, 03:06 AM   #11 (permalink)
It's all about Diesel
 
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I have seen something about tests with algae to decrease the saline concentration of a byproduct of sugarcane ethanol brewing, and those algae were also meant as a biofuel feedstock. Didn't have any update about that in the last 2 years.

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Old 04-25-2020, 03:24 PM   #12 (permalink)
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Originally Posted by Frank Lee View Post
Algae for fuel, for instance. It was all the rage for a while there.
Oil is cheap and plentiful and most people are not really worried about carbon emissions. I thought it showed great promise. There may be a place for it someday but priorities will have to change.
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The power needed to push an object through a fluid increases as the cube of the velocity. Mechanical friction increases as the square, so increasing speed requires progressively more power.
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Old 04-25-2020, 05:36 PM   #13 (permalink)
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If people really cared about CO2 emissions they would:
Drive an electric, if electric wasn't a viable option then they would drive a small diesel car.
Never use air travel.
To include consumption of fresh fruits and vegetables that are flown in from afar.
Have solar panels, not excuses.
Not be overweight, I'm sorry but I can't help but laugh at "glutinous environmentalists".
Grow some of their own food, even if it's just one kind of herb, a spice, a single tomato plant, ect.
Not use natural gas or propane.
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Old 04-27-2020, 03:17 AM   #14 (permalink)
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IIRC, too much energy required to separate the oil and water.

Quote:
Originally Posted by oil pan 4
I don't see electric being able to fly a plane to a different part of the world any time soon.
Quote:
Originally Posted by rmay635703
Balloon slowly floating off wind power?
AeromodelerII

https://inhabitat.com/hydrogen-wind-...modeller-ii-8/
It is would be as long as a football field with a cabin the size of a studio apartment.
Fuller's Cloud City

http://hoolawhoop.blogspot.com/2011/...mispheres.html

If you inject a hotel into the jet stream you only need to fly up and down. Of course, in each hemisphere it's only one way.

Vodka from the air:
www.pressherald.com/2020/04/26: Boxed wine and vodka made from CO2 That's the the green future of booze.
Quote:
Amid the coronavirus pandemic, climate change still demands global attention, which is why a green movement is sweeping the wine and spirits world.

Did you know that synthetic bioluminescence from bacteria could make lighting in wineries more sustainable? Or that distillers can use solar power to create vodka out of thin air and water? These are among the surprising things I learned at a forum on wine and climate change at Vinexpo Paris in February, before social distancing became a way of life and air travel a memory
www.sciencemag.org/news: Ammonia—a renewable fuel made from sun, air, and water—could power the globe without carbon
Quote:
(That's where MacFarlane comes in.) For the past 4 years, he has been working on a fuel cell that can convert renewable electricity into a carbon-free fuel: ammonia. Fuel cells typically use the energy stored in chemical bonds to make electricity; MacFarlane's operates in reverse. In his third-floor laboratory, he shows off one of the devices, about the size of a hockey puck and clad in stainless steel. Two plastic tubes on its backside feed it nitrogen gas and water, and a power cord supplies electricity. Through a third tube on its front, it silently exhales gaseous ammonia, all without the heat, pressure, and carbon emissions normally needed to make the chemical. "This is breathing nitrogen in and breathing ammonia out," MacFarlane says, beaming like a proud father.
www.hellenicshippingnews.com: Cross currents: Big oil and the energy transition in Oil & Companies News 23/04/2020
Quote:
Well before the oil price rout caused by the coronavirus pandemic, commentators and shareholders were calling on Big Oil to make step-out energy transition acquisitions.

Now, with economies in lockdown and corporates fighting to survive, the oil sector’s incremental move into new energy looks over-cautious.

As the value of their fossil fuel assets tumbles, the coronavirus lays bare these companies’ exposure to a world of massively smaller oil and gas demand, offering a glimpse of the EV revolution to come.
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Old 04-27-2020, 07:43 PM   #15 (permalink)
It's all about Diesel
 
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Quote:
Originally Posted by oil pan 4 View Post
Drive an electric, if electric wasn't a viable option then they would drive a small diesel car.
In the end, going all-electric might not make so much sense at all. Either biodiesel, ethanol or biomethane provide a better opportunity to close the carbon and nitrogen cycle than leaving raw materials rotting away venting methane and other compounds directly to the atmosphere.


Quote:
Never use air travel.
Sure it's more complex when it comes to aircraft with a pressurized cabin, but with smaller piston-engined aircraft it's often easier to keep control of emissions. The problem is more bureaucratic than technical. On the other hand, in some regions air travel is actually more cost-effective and with lower emissions than other forms of transportation.


Quote:
Have solar panels, not excuses.
I have already considered to install a roof-mounted wind power generator in my grandma's house, as it would be presumably easier and cheaper to make one repurposing an alternator.


Quote:
Grow some of their own food, even if it's just one kind of herb, a spice, a single tomato plant, ect.
Just like the Victory Gardens during WWII? I have already considered trying something similar, even though it's not so easy to implement in a small apartment. Well, maybe if composting toilets were more widely accepted, it would've been an excuse to try growing some berries, herbs and spices.


Quote:
Not use natural gas or propane.
I'm not unfavorable to natural gas in an engine with multi-port sequential injection, plus it can eventually be replaced with biomethane.
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Old 04-27-2020, 08:03 PM   #16 (permalink)
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Quote:
Either biodiesel, ethanol or biomethane provide a better opportunity to close the carbon and nitrogen cycle than leaving raw materials rotting away venting methane and other compounds directly to the atmosphere.
Absent hydrothermal or tidal power and bio-char, then yes.
Quote:
On the other hand, in some regions air travel is actually more cost-effective and with lower emissions than other forms of transportation.
Bucky Fuller: "Tracked to trackless, wired to wireless"
Quote:
I have already considered to install a roof-mounted wind power generator in my grandma's house, as it would be presumably easier and cheaper to make one repurposing an alternator.
Figure of speech, I presume; but I'm greatly in favor of indoor windmills. Would y'all like to know more?

Be wary of attaching a mast to the wall of the house, the vibration might turn the wall into a drum-head or perform an unscheduled disassembly.

Consider a vertical axis with a tuned mass vibrational damper. Here's a link to some of the good work of fellow ecomodder-er, Julian Edgar:

www.autospeed.com:Mounting big driving lights, Part 2
Quote:
A Tuned Mass Damper needs to use a minimum mass about 10 per cent of the total mass of the main system, and as already said, it needs to have a resonant frequency about the same as the main system.
Put the rotor above a skylight opening and a battery/controller box inside out of the weather.
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Old 04-27-2020, 10:06 PM   #17 (permalink)
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Oh the ATF is gona love technology that can synthesize alcohol from air.

Bio methane can easily be used by industrial producers, such as glass, concrete, roads, none left for us proletariat.
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Old 04-28-2020, 12:49 AM   #18 (permalink)
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Quote:
Originally Posted by cRiPpLe_rOoStEr View Post
Quote:
Never use air travel.
I'm sure it's more complex when it comes to aircraft with a pressurized cabin, but with smaller piston-engined aircraft it's often easier to keep control of emissions. The problem is more bureaucratic than technical. On the other hand, in some regions air travel is actually more cost-effective and with lower emissions than other forms of transportation.
Yes, air travel is more complex than it is made out to be. People that are against air travel should actually be campaigning against travel altogether.

Yes, flying is massively wasteful way to get from San Diego to LA but it is the ecological way to get from San Diego to NYC or Tokyo.

Air travel is more energy efficient than driving for long distance travel and way more efficient than ocean liners for transoceanic travel.

The paper below puts driving at 4200 BTU / passenger mile while flying is 2000 BTU / passenger mile.

It seem counter intuitive until you realize that planes are a form of public transportation and one that operates at near max capacity. A 777-300 ER carries 365 people and 7120 cu ft of cargo and takes 6 hours to get from SAN to JFK.

To move the same number of people you would need 91 sedans (with 4 to a car) + 2 semi trucks. That 2793 mile trip is going to take 3-5 days.

Quicker to fly / Cheaper to fly / Less energy intensive to fly.

https://deepblue.lib.umich.edu/bitst...=1&isAllowed=y
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Old 04-28-2020, 01:30 AM   #19 (permalink)
It's all about Diesel
 
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Quote:
Originally Posted by JSH View Post
Yes, flying is massively wasteful way to get from San Diego to LA but it is the ecological way to get from San Diego to NYC or Tokyo.

Air travel is more energy efficient than driving for long distance travel and way more efficient than ocean liners for transoceanic travel.
I was considering some places in Amazon where access is easier by boat or aircraft than by Jeep

The usage of regular unleaded gasoline for aircraft in Brazil is illegal, even though it happens quite often. Well, considering not only that unleaded gasoline and ethanol can be used in engines fitted with catalytic converters, which are absent on small aircraft even when they're dedicated-ethanol such as some versions of the Embraer Ipanema cropduster, it's also worth to notice the low compression ratio which most of the Lycoming and Continental aircraft engines feature wouldn't be so troublesome with regular unleaded gasoline.

On a sidenote, for some crops it's better to rely on cropdusting by aircraft due to the lower compactation of the soil.
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Old 04-28-2020, 09:46 AM   #20 (permalink)
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Notes: I was under the impression that per seat mile, fuel consumption of modern aircraft high bypass engines was competitive to cars. 747 aircraft claimed 20seat mpg with 40 year old engines.

Having a STC for auto fuel in my 50 Piper Pacer, preignition was the most detrimental hazard followed by alcohol eating the rubber hoses. The difficulty with auto fuel is the variable octane batch to batch and the mass of odd chemicals added to the base fuel all of which is not posted on the pump. With a $30,000 USD replacement cost, you get careful really fast.

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