11 votes

Domestic flywheel energy storage: how close are we?

Lets check the pros and cons on flywheel energy storage and whether those apply to domestic use (source): Compared with other ways to store electricity, FES systems have long lifetimes (lasting ...
Ghanima's user avatar
  • 496
10 votes

Domestic flywheel energy storage: how close are we?

Domestic flywheels are unlikely to happen for 3 reasons: They must be heavy to store significant energy. If you need a crane to install one at your house it’s never going to be super cheap, even with ...
Ian 909's user avatar
  • 101
7 votes

Domestic flywheel energy storage: how close are we?

We were looking into flywheel UPSes for my company and I read up on this a bit. Of note in recent developments: Instead of traditional bearings, they're using magnetic bearings to mostly eliminate ...
Dave's user avatar
  • 71
7 votes

Electrical usage data logging with wireless data transfer

It sounds like the Kill A Watt wireless might be what you are after. For more alternatives keep reading. There is another product line called the Watts-Up that has USB connections to computers on ...
user2121874's user avatar
7 votes
Accepted

What is the impact of switching to smart metering?

There is very large uncertainty on this, and one should not attach much credibility to reports that do put a specific number on it. Early work suggested that easy availability of real-time energy-use ...
410 gone's user avatar
  • 14.7k
5 votes

Is 3 phase electrical generation more efficient to utilize than single phase?

I'm going to assume you'e in the USA since you're using Imperial units. 1) Is 3 phase power more efficient to generate/use? In bulk, yes. Three phase (or sometimes 6 phase/3 phase 220V in low-...
Móż's user avatar
  • 3,874
5 votes

What is the impact of switching to smart metering?

There is a very detailed and interesting document of the British Government (Impact Assessment DECC0009: "Smart meter roll-out for the domestic and small and medium non-domestic sectors") where the ...
S -'s user avatar
  • 1,512
4 votes
Accepted

Efficiently freezing an ice pack once per 48 hours

Some years ago I read of an off-grid farmstead in Australia that used a conventional chest freezer as a refrigerator. The way he did it was to use a probe and temperature controlled relay to turn the ...
Sherwood Botsford's user avatar
3 votes

Best strategy for turning off computer/laptop monitors to save energy but not reduce lifespan?

Modern monitors use LED backlights. LEDs are not damaged by being turned on or off. In short; I can't see any reason why this would do anything to the lifetime of the monitor, and it has never been a ...
vidarlo's user avatar
  • 176
3 votes

How can I figure out what's using so much electricity in my home?

For the daily energy consumption quoted, optimizing the lights will not make a significant dent. I know because I've been there. Keep in mind that large loads (electric stove, electric drier, heaters, ...
Radu Popa's user avatar
3 votes

Producing my own energy options in urban area with windows but no roof access?

Others have touched on this too, but if it's purely about economic or environmental concerns, then saving energy is better than creating new energy just to turn around and waste it. If you spend ...
Henry's user avatar
  • 321
3 votes

How to stop paint deterioration of inner side of roof

Moss takes a while to grow, but when it fills in it makes a beautiful interior or exterior wall covering. If the concrete has moisture that will actually help the moss grow without need of misting ...
user2121874's user avatar
2 votes

Domestic flywheel energy storage: how close are we?

My knee jerk reaction: From what I know of mechanical systems, anything mechanical introduces losses due to friction in the form of heat, sound, and vibration. How would you even begin to use the ...
MountainClimberi's user avatar
2 votes

Is 3 phase electrical generation more efficient to utilize than single phase?

Another option: Generate single phase. Run your house on this. Wiring your electrical system is much simpler, and can be done by anyone who can read and understand the equivalent of "Alberta ...
Sherwood Botsford's user avatar
2 votes

Domestic flywheel energy storage: how close are we?

I was only able to find one residential flywheel energy storage system for sale as of right now. It has a low (but manageable) power output and is priced competitively. Unit Specs: Power: 3kW | Energy:...
Brian C's user avatar
  • 21
2 votes

Domestic flywheel energy storage: how close are we?

TL:DR: They extend the life of expensive UPS batteries by absorbing the transients. Example: Hosptial with an MRI Engery surge on start up with UPS graciously assisting. The MRI fires up 10 times a ...
Mike's user avatar
  • 21
2 votes

Energy storage idea: Pumped hydroelectric storage in ocean using difference in salt content

It may be technically feasible. But in reality, for places that do desalination, it's never going to be economical, because there's already an easier way to do things. Storage on the grid is useful ...
410 gone's user avatar
  • 14.7k
2 votes

What level of light intensity (lumens) do you need across a solar panel in order to obtain 15% energy efficiency?

What level of light intensity (lumens) do you need across a solar panel in order to obtain an energy-output to incident-light efficiency of 15%? This depends on the varying characteristics of ...
Jiminy Cricket.'s user avatar
2 votes

How to use solar power with grid backup without net metering

On the Enmax website they have a page that shows how to read your meter. There is a link there "How to find your electric meter number" This overlays a picture of the electricity meter Is ...
Solar Meitheal's user avatar
1 vote
Accepted

Being sustainable in a rental in the tropics

In the tropics, solar panels are very useful to reduce your carbon footprint. Since your energy consumption is dominated by air conditioning, and air conditioning need is largest during daytime, solar ...
juhist's user avatar
  • 4,954
1 vote

Being sustainable in a rental in the tropics

The first piece of advice is to try to acclimatize to the hot weather as soon as possible - try to adapt to the environment. As time go on try to use the air conditioner less and less and the ceiling ...
Fred's user avatar
  • 3,507
1 vote

How to use solar power with grid backup without net metering

From Wikipedia: This exported energy may be accounted for in the simplest case by the meter running backwards during periods of net export, thus reducing the customer's recorded energy usage by the ...
juhist's user avatar
  • 4,954
1 vote

Is hydrogen a good way of storing energy from excess hydroelectric generation?

No, it is too tricky to handle for the general public. When it leaks ( not -if it leaks) , it will rise in a storage area and may reach explosive conditions. I once saw a brick wall blown out of a ...
blacksmith37's user avatar
1 vote

Energy storage idea: Pumped hydroelectric storage in ocean using difference in salt content

The article you linked says that the salt content of the seawater released by the desalinization plant is increased by 20%, not that the effluent is 20% salt. This means that normal 3.5% salt seawater ...
kingledion's user avatar
  • 1,077
1 vote

How can I figure out what's using so much electricity in my home?

About the graph showing the changes along the week, I suggest you to take a list of the domestic appliances that consumes more eletricity (like this ), to sort them by energy consumption rate, and to ...
Tms91's user avatar
  • 186
1 vote

Are there any active vehicle to grid programs around the world that are accepting customers?

AFAIK not yet, at least not any that are open to a large audience, but with so many pilot projects on-going it's only a matter of time. Basically there are 3 things that make V2G hard / expensive to ...
THelper's user avatar
  • 14.5k
1 vote

Energy storage idea: Pumped hydroelectric storage in ocean using difference in salt content

This all seems highly inefficient. Your one calculation based om m*g*h is meaningless, g is not 9.8 here. You have to displace the sea water which is almost as dense as the saltier water you want to ...
Martin Maat's user avatar
1 vote

Domestic flywheel energy storage: how close are we?

TL;DR - Because of how flywheel energy storage scales it is unlikely that significant efforts will be made to develop the technology for home use. This is similar to the case for windmills, where ...
LShaver's user avatar
  • 11.9k
1 vote

What are the incentives for energy companies promoting energy efficiency?

They're mandated and/or sponsored by government. The companies are slightly motivated to use this money well to appear as friendly, neighbourhood, we-have-your-interests-at-heart companies, i.e. ...
FreeText's user avatar
  • 269

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