Would the materials have much more of a footprint than geothermal installations? Because that slight 7° difference between below ground temp and above ground temps apparently justifies the labor, materials, and power to the circulators for harvesting geothermal energy. So this seems to be the same but adding a cherry on top – incorporating a heat pump to add to the energy of a geothermal system.
Because of Google’s DoS attack, those of us in the open free world cannot reach Youtube. So would someone please explain the concept in text?
Is this it? → https://utahforge.com/2022/12/30/did-you-know-that-scottish-clubbers-use-dance-beat-to-generate-heat/
Seems like a great idea. Like using the body heat to boost geothermals.
Someone plz tell Massive Attack about this. Massive Attack has gone gung-ho on eco-friendly festivals (in places inaccessible by car). They might want to throw some indoor events with this tech.
(edit) from the article:
“An experienced DJ could get up to 600 watts with the right song at the right time.”
So IIUC that’s like ~1½ solar panels getting a full dose of UV, correct? I guess that’s not much. But nonetheless not something to throw away either. So during the day solar panels on the roof could heat the ground pipes and during the night the clubbers keep the system powered.
Would be fun for that power output to be measured, and then that power measurement could be a performance index on each DJ. You pay the DJ according to the power output they can produce. Though I guess that would screw over the ambiant / trip-hop DJs.
Have they thought this through? To install batteries that are much heavier than what the bus trip requires makes the bus less efficient. Research in the UK found that a bus carrying 5 people is about as efficient as 5 cars each carrying 1 person. That’s because of the weight of the bus. So the goal should be to fill the bus with people, not excessive batteries and overhead that need not move back and forth from A to B which then requires more riders to maintain the same efficiency.
Sure they need to store energy for to smooth out peak grid consumption but probably smarter to do that with stationary batteries – if they must use batteries. Another way to store energy: pump water to the top of a mountain and open a dam that turns a hydro turbine when they need the energy back.
from the article:
Pollution from buses and other vehicles contributes to chronic asthma among students, which leads to chronic absenteeism.
Seems like a stretch. Even if they can attribute chronic absenteeism to air pollution and keep a straight face, moving the pollution of a fleet of buses that makes 2 trips/day from the street to the power plant isn’t going to change the absenteeism by reducing asthma. This claim only signals a bit of desperation to get support.
Well that depends on how equipped you are. One cool thing about compressors is you can straight up connect a PV directly to a compressor with no voltage regulators or anything. So if you have a simple setup like that, I can see up front cost effectiveness in storing ice. But if you already have batteries, and thus voltage regulators and all the costly intermediate components to make that possible, then I would agree… I might rather store it in lead acid batteries as that would be more versatile.
Sounds like they would do well in Arizona, where the air is dry. IIUC swamp coolers were very popular in Arizona until ~20 years ago when temps increased so much that swamp coolers could not make enough difference (this is largely because more and more land became concrete, which reduced the effect of evaporative cooling the land mass). So a/c became more popular in AZ IIUC. But the dry air would still be dry.
Great basic concept but I think I would benefit more for the stored cooling going toward ice cubes for mojitos.
I don’t imagine that a single family dwelling would benefit from the extra complexity of adding cold water pipes in all the floors of the house. Probably makes more sense for apartment buildings (or perhaps homes that already have hydrothermal floors for heating).
Consider this excerpt:
When the grid is extremely stressed, utility companies are sometimes forced to shut off electricity supply to some areas, leaving people there without power when they need it most. Technologies that can adjust to meet the grid’s needs could help reduce reliance on these rolling blackouts.
So grid-powered a/c can give the grid relief at peak times with this tech.
But indeed this tech on a PV-powered compressor seems sketchy. There are probably moments when the sun is hitting hard but the temp has not climbed up yet (sunrise) in which case it would be useful to store the energy. But I’m struggling to understand how the complexity of the system would be justified considering the overall efficiency is reduced as well. I wonder what proportion of time this system would be working in storage mode. If sunrise is 9am and peak heat is 2pm, maybe there’s ~2—4 hours of storage time potential.
OTOH, consider someone with a slightly underpowered PV. Maybe the energy storage can compensate for peak heat times when the PV output may be insufficient. Perhaps it would enable homeowners to spend less on PV panels.
fwiw, here is an emacs version:
https://codeberg.org/martianh/lem.el#headline-11
I think what would be most useful would be a usenet→lemmy gateway, so that rich catalog of usenet clients can be leveraged on Lemmy.
I get rid of them pretty quickly by saying I have no bank account. I might start adding to that “take cryptocurrency?” so they leave with the idea that maybe they should be open to cryptocurrency.
@youmaynotknow is spot on. But consider this a very basic primer on just a small fraction of privacy abuse by banks:
So there’s 22 privacy abuses by banks to get you started. And that just barely scratches the surface.
You can somewhat ignore paragraphs 15 and 23 in terms of privacy. OTOH privacy is hand-in-hand with control and paragraphs 15 & 23 reflect control being in the wrong hands.
Banks abuse our privacy in countless ways. This could fill a book. This policy amounts to forced banking. I boycott banks. Banks have us by the balls and they abuse that power. A bank recently told me (in effect) to fuck off if I don’t have a mobile phone number to give them.
It’s impossible to define the amount in relative terms such as “average EU monthly salary +25%”,
It’s not impossible. Indexes are published. This is what they do with rent in places where rent is controlled. Landlords cannot increase rent more than an index. So they have to do the math. And in this case it’s not even a variable baseline like rent, it’s fixed, so the calculation can also be published so people need not do any math.
That’s net (take-home pay), not gross. Tax is high enough that you need to double that figure (€4,400) to get the gross pay. And just wait till you account for inflation, which the EU cash limits apparently fail to account for.
this poll shows it’s non-partisan:
https://layer8.space/@hyakinthos/112554837920009346
The left respects privacy far more than the right. But the left also has that high-taxation tendency. The outcome of that tug-of-war within left-leaning people results in ~73% embracing cash – just like the conservatives who don’t give a shit about privacy but have contempt for tax.
Beware on your next trip to Netherlands, where some bars refuse cash and conceal their contempt for cash (reference)
I just linked your post from that one because it fits well with the story.
(edit) BTW, I would like to see your workmate’s story published in a blog that serves better as a reference. It needs more exposure in a venue that’s not quasi temporary. I would even print hardcopies of it to distribute to cashless bar owners. So a nicely typeset PDF would be useful.
What country was that? I heard about a Belgian who tried to withdraw €10k from her bank account. They refused and also called the police who interrogated her and made a report. Belgian banks have cash withdrawal limits written in the contract. Even pulling out €3k raises eyebrows in Belgium. So withdrawing €30k trouble-free would probably require withdrawing €2.5k once per week over the span of 12 weeks. Is the car seller willing to hold the car for a buyer that long?
That’s not because of the cash. Even white collar workers getting paid electronically get audited because Belgium has a very high audit rate. I heard the probability of getting audited in Belgium is around 50%. Belgian auditors are extremely ambitious and highly motivated. They are employed in high numbers. The only way to avoid being audited in Belgium is to not work in Belgium.
This depends on the industry. Domestic workers and builders are often paid in cash in Europe. Belgium even writes it in law that cash wages are prohibited if you work in an industry where that is uncommon. Strange (and discriminatory) law, but indeed white collar workers are legally blocked from cash payment while other industries are grandfathered.
Indeed national laws don’t generally limit p2p cash, but the EU law encroaches on that AFAICT.
Shit… sounds about right.
Although the /water is hot enough/ scenario could be addressed mechanically: bigger water tank, lower heating element raised and the heat pump heating the bottom exclusively where it could /always/ add heat because it would never be hot enough at the bottom.
(edit) after some thought, it would superficially make sense to get a factory water heater (tank) and not tamper with it at all. Just have a PV-powered HP heat water before it enters the stock water heater (in a tank or coil). Thus there could be 2 heat pumps (but for economy the stock tank would just be a simple non-heat pump type thus 1 HP). I guess this is still a dead idea anyway if it’s true that a PV cannot simply directly connect to a compressor.