I work in electricity and heat production, to me this sounds mainly green washing. Why use CO2 and plain pressure?

Storing this magical 200MWh, would require stupid amount of volume and pressure. We have better gasses, and hundreds of years on knowledge in heat pump tech with better efficiencies.

To my ear it sounds that they just picked CO2 for news articles/investors, not for science reasons.

All large cities in Finland are heated by combined heat and power (CHP) power plants.

These power plants first make super heated steam (like 800°C, 1500°F), runs that through turbine to make electricity, then send the cooled down water (80-150°C, 170°F-300°F) to all homes through district heating grid.

From that water the home is heated and hot water is used.

Now that we have the district heating network, when electricity is cheap, we can also use electricity to boil the water and send it through the grid. Water is also easy to use as storage, if the need of consumption requires buffering.

Smaller cities use just heat plants, were there is no turbine for electricity generation, just the heating of water to district heating grid.

Most plants use biomass as power source in the power plants, historically they were coal, but it has been now almost completely phased out.

To be fare, you can open PDF in Word and it converts it to editable docx

The problem is that it can only be speculated how they work, because they have not published it. That is quite suspicious in my book.

I personally would avoid reolink and use rtsp + frigate + ha, to have full control with known open source selfhosting solution.

I understand that people like the easy setup, but if you already do selfhosting, it isn’t that big jump.

Be careful with reolink, their P2P solution is pretty suspicious. No body really knows how it works and who it shares the data with.

You can disable those features, but it will stop reolink app from working.

They have never explained how the peer-2-peer network works, and it security and privacy is quite unknown.

Reolink is Chinese, which doesn’t really help these concerns.

Better to selfhost frigate and just rtsp cameras there.

I was working on a project that had 100 000 line oracle database PL/SQL procedure that ordered a work order from subcontractor. It was just one single function. That was called by classic asp + visual basic COM component.

Oh Lord, I get Vietnam flashbacks about it.

Serious answer to non-serious question, corpos can deliver apps to phones past app stores, e.g. intune/company portal etc.

Aww hell no, still getting nightmares on classic asp error handling.

Those are pressured systems, the water is kept in high pressure, which means it is liquid water. When it goes through turbine it it steam, usually superheated.

In industrial settings you can get water to 350°C in liquid form, it just about the pressure.

Even the city wide district heating networks water is kept at 3 bar, which can keep the water at liquid for 133°C in the winter time.

Amount of Russian assets, bots and useful idiots are going rampant. They want US to go to civil war.

Dedup

Google is so shit nowadays, it’s main purpose is to sell you things, not to actually retrieve the things you ask.

Mainly you see this with coding related questions, they were much better 5 years ago. Now only way to get results is to ask LLM and hope it doesn’t hallusinate some library that doesn’t exist.

Part of the issue is that SEO got better and google stopped changing things to avoid SEO manipulation.

I must admit, my home rack server runs hyper-v, it is free and I have MSDN. Of course inside the hyper-v I run ten linux boxes.

Proxmox really didn’t exists before and I didn’t want to use VMware.

Next one I will do with proxmox.

Please dont judge me.

Large scale three phase energy generation is always something rotating in sync with the grid. Easiest way to do that is to spin turbine+generator.

All nuclear, coal, biomass power plants just heat water to 300-800°C and push it through turbine.

The thing is that it is really quite robust, and there isn’t any other good solutions to it. They do have quite a lot of loss, but the cooled water after process (still over 100°C) can be used in other industries or district heating improving the efficiency.

Hydropower just spin the turbine with water flow. Wind directly spins the turbine, which is good for efficiency. Solar panels are still quite inefficient, but because they just use space, they make lot of sense even with poorer efficiency.

Being king as having huge losses, but unfortunately it is the best we got

Yes, I totally agree, when talking about these thermal batteries, it should always be made clear.

When Converting heat MWh(t) to electricity MWh(e) is pretty much 2/3 loss in the process, i.e. turbine, and it must be super heated vapor meaning like 800C°.

Edit: But to be clear, they are called heat batteries, even in English.

Yes, and the basic principle of thermal batteries has been quite common here in Finland for some time.

All Finnish cities have district heating networks, so there is some heating plant that generates heat, which is distributed to homes using water as medium. It is closed system where hot water goes in, colder water comes out, which is heated back up. This energy is used to heat the home and heat the cold usage water (faucet/shower etc)

Because the network is lots of water, there is already quite a lot of energy storage in the heat grid itself, so itself works as a battery. In last five years almost all big networks have created water based thermal batteries. Those are 7-8 stories high insulated water containers. These make sense because you just start taking the already heated water from the container to the grid when ever you need.

So the tech itself is quite standard here, just the medium of using sand is new. Sand brings you bit longer storage time, but adds bit of complexity to the process.

Source: I work in a company that owns these kind of networks

He is Russian stooge

Deathray!

There could be some sense figuring first out water containers. Old saying is that human survives few minutes without oxygen, few days without water and few weeks without food. Water > Food

Also as a hunter gatherer, food is around you (berries, roots, game) and you can carry them with you. Drinking water is more scarce and keeping it with you when you move around needs some container.