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Submission + - Rocketing Toward Efficiency: Paul Wheaton Explains Rocket Mass Heaters (richsoil.com)

Skystrider writes: Alternativeenergy tinkerers and offgrid builders may enjoy a new deepdive from permaculture educator Paul Wheaton, who has published an extensive writeup explaining how rocket mass heaters work, why they burn cleaner than typical wood stoves, and what kinds of builds are seeing success in the DIY community.

Wheaton’s piece covers the combustion physics behind “rocket” burn tunnels, the role of thermal mass in holding heat for long periods, and practical considerations for anyone experimenting with a design. He also highlights the differences between codeapproved systems and the more experimental setups that circulate in homesteading circles.

If you’ve ever wondered why these heaters use surprisingly little wood, how they achieve such clean burns, or what sorts of builds normal people are constructing in garages and backyards, his overview is a solid starting point.

Submission + - Researchers At CERN Transport Antiprotons By Truck In World-First Experiment (physicsworld.com)

An anonymous reader writes: Researchers at the CERN particle-physics lab have successfully transported antiprotons in a lorry across the lab’s main site. The feat, the first of its kind, follows a similar test with protons in 2024. CERN says the achievement is “a huge leap” towards being able to transport antimatter between labs across Europe. [...] To do so, in 2020 the BASE team began developing a device, known as BASE-STEP (for Baryon-Antibaryon Symmetry Experiment-Symmetry Tests in Experiments with Portable Antiprotons), to store and transport antiprotons. It works by trapping particles in a Penning trap composed of gold-plated cylindrical electrode stacks made from oxygen-free copper that is surrounded by a superconducting magnet bore operated at cryogenic temperatures.

The device, which also contains a carbon-steel vacuum chamber to shield the particles from stray magnetic fields, is then mounted on an aluminium frame. This allows it to be transported using standard forklifts and cranes and withstand the bumps and vibrations of transport. In 2024, BASE researchers used the device to transport a cloud of about 105 trapped protons across CERN’s Meyrin campus for four hours. After that feat, the researchers began to adjust BASE-STEP to handle antiprotons and yesterday the team successfully transported a trap containing a cloud of 92 antiprotons around the campus for 30 minutes, travelling up to 42 km/h.

With further improvements and tests, the team now hope to transport the antiprotons further afield. The first destination on the team’s list is the Heinrich Heine University (HHU) in Düsseldorf, Germany, which would take about eight hours. “This means we’d have to keep the trap’s superconducting magnet at a temperature below 8.2 K for that long,” says BASE-STEP’s leader Christian Smorra. “So, in addition to the liquid helium , we’d need to have a generator to power a cryocooler on the truck. We are currently investigating this possibility.” If possible to transport to HHU, physicists would then use the particles to search for charge-parity-time violations in protons and antiprotons with a precision at least 100 times higher than currently possible at CERN.

Comment Let's look at the Numbers (Score 1) 33

So Alphabet Inc, which has lobbied the Federal Government with $7.26 million and is subsidized by state governments at $2,058 million will get to determine which stories are told? I don't know how much the government is paying for Google Workspace. But in 2010 it was $6.7 million. In 2012 it was $34.9 million. So really you will have different state and federal government agencies leaning on Google to change the news. Which is already the case. But now the cause and effect is even easier to follow.

Comment Just what Students Need, more ways to waste time (Score 1, Interesting) 47

I'm finishing up my second degree. Man, what I didn't need during this process was streaming services. When Netflix banned password sharing (remember when they advertised password sharing as a perk?) I dropped it like a rock. I didn't even think to look if there was a student discount. Back in the day I bought a student edition of Access. But there is no reason to do that now when open source has such things covered. Amazon keeps offering me free trials of prime. Why would I do that? I'm out here building a better world in my backyard.

Comment Living Energy Direct DC (Score 1) 338

Recently I've been fascinated by Living Energy Farm's approach to solar power. A whole lot of electric motors are universal motors, they can run on AC or DC. So Alexis set up some solar panels and runs equipment directly off of them. No batteries, which means no charge controllers. He calls it "Daylight Drive." By pairing blowers with a passive house design they store heat from the sun in their floor.

For small electronics and lighting at night they use 12 volt nickel-iron batteries. Because those just keep going, as long as you refill the cells once a month.

Alexis gives a tour of the systems in this video

Comment 100 Ways to Cut one's personal carbon footprint (Score 1) 300

In a cold climate, 65% of one person's energy consumption involves heat. The solutions must be to make people luxuriantly warm while saving them a lot of money. - Microheaters to heat the people instead of the whole house. This cuts the heating bill by 90%. Do as much or as little as you want. - Using electric microheaters to cut 20% off your heat bill while on electric heat in a cold climate cuts 6 tons - Using electric microheaters to cut 80% off your heat bill while on electric heat in a cold climate cuts 23 tons - Using electric microheaters to cut 80% off your heat bill while on natural gas heat in a cold climate cuts 7 tons - Rocket mass heaters. This cuts the heating bill by 98%. A wood burning contraption you can build. Compared with a conventional wood stove, it heats with one tenth the wood and one thousandth the smoke. - Switching to rocket mass heater from electric heat in a cold climate cuts 29 tons COOLING - Plant deciduous trees or vines on the south and west sides of your house cooling shade in the summer. Added bonus: have the trees/vines produce food for you! - Open windows at night Use cross ventilation to cool down your house during the night, and bring in fresh air. Close up the windows during the day to keep the cool air in. Use white/reflective curtains or window shutters to keep the house cool during the day. Food Choices - 50% of our petroleum footprint and 35% of our carbon footprint is tied to our food. - Growing 10% of your food cuts 1 ton - Growing 50% of your food cuts 5 tons - Growing 90% of your food cuts 10 tons - Growing 90% or your food plus 10% for ten other people cuts 19 tons - Growing 90% or your food plus 90% for ten other people cuts 110 tons - When you eat an apple, put the seeds in your pocket. Plant the seeds when you see a spot. An apple a day could result in cutting you carbon footprint 100 tons per year! 100 Ways to Cut One's Personal Carbon Footprint

Comment If You Are Serious (Score 1) 200

Here is a list of ways that you could reduce your carbon footprint: Heat in a Cold Climate the average montana house heated with natural gas puts 8.9 tons of CO2 into the air per year. the average montana house heated with electricity puts 29.4 tons of CO2 into the air per year the average montana house heated with a conventional wood stove puts 4.4 tons of CO2 into the air per year the average montana house heated with a rocket mass heater puts 0.4 tons of CO2 into the air per year Switching from electric heat to a rocket mass heater in a montana home can cut 29 tons per year. Using electric microheaters to cut 20% off your heat bill while on electric heat in a cold climate cuts 6 tons Using electric microheaters to cut 50% off your heat bill while on electric heat in a cold climate cuts 15 tons Using electric microheaters to cut 80% off your heat bill while on electric heat in a cold climate cuts 23 tons Using electric microheaters to cut 80% off your heat bill while on natural gas heat in a cold climate cuts 7 tons 50% of our petroleum footprint and 35% of our carbon footprint is tied to our food. Growing 10% of your food cuts 1 ton. Growing 50% of your food cuts 5 tons. Growing 90% of your food cuts 10 tons. Growing 90% or your food plus 10% for ten other people cuts 19 tons. Growing 90% or your food plus 90% for ten other people cuts 110 tons Sources and discussion here

Comment Re:Technology (Score 1) 79

One of the best technologies to use in a cold climate is a rocket mass heater. They work by conductively warming your butt. They burn so cleanly and efficiently that they capture the vast majority of the energy inside your house while emitting almost zero smoke. You can learn more about them by watching the Free Heat Movie

Comment Carbon Negative Mass Heaters are one answer (Score 1) 166

There are a number of ways to reduce your carbon emissions while increasing your comfort level. One way is to build a rocket mass heater, which can warm your butt directly. They use far less fuel than most other forms of heat. Some people run theirs all winter with just the sticks that fall in their yard. You can compare different kinds of heat by looking at this infographic.

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