Who needs batteries to store surplus green electricity when you can store it in the air.

[Jev88]

There isn't that much surplus power. Storing as hydrogen offers little benefit to the grid sadly, storing as air does. You know for when the wind stops blowing and at peak times.

I hear you but read somewhere (famous last words) that a lot of wind turbines are turned off in darkness when most folk are asleep, when they could be left working if we had some other purpose for them to be used.....

 

[Gromett]

I hear you but read somewhere (famous last words) that a lot of wind turbines are turned off in darkness when most folk are asleep, when they could be left working if we had some other purpose for them to be used.....

They are not turned off at night. However during high wind conditions at low demand levels "some" may be required to curtail output and "turned off" but it won't be all of them and not every night. This is where the excess electric comes from and it is this that needs to be stored in a manner where it can be efficiently turned back to electric to cover peak times.

I will do a graphic to explain what I mean.

 

[Two on Tour]

I wonder how much energy it takes to cool, compress and store using this method ?

 

[68c]

Ive got a buffer cylinder on my solar system (7kw). the difference is a powerwall is 10 x the price.

Are you talking about storing hot water in a buffer tank? I believe the liquid air system expands the liquid air over a turbine to directly drive a generator to produce electricity. That is different to storing hot water.

 

[jongood]

Are you talking about storing hot water in a buffer tank? I believe the liquid air system expands the liquid air over a turbine to directly drive a generator to produce electricity. That is different to storing hot water.

I was commenting on #13 who was making an observation about #10. slightly off topic sorry.

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[Jev88]

They are not turned off at night. However during high wind conditions at low demand levels "some" may be required to curtail output and "turned off" but it won't be all of them and not every night. This is where the excess electric comes from and it is this that needs to be stored in a manner where it can be efficiently turned back to electric to cover peak times.

I will do a graphic to explain what I mean.

Around the globe wind turbines are actually turned off when not required and in the UK for certain the owners are actually paid to turn them off when they have sufficient power already in the network. Let's not pay them to do nothing? "Constraint payments". Hence, why i think the compressed air combined with Hydrogen production would be far more sensible?

 

[jongood]

I wonder how much energy it takes to cool, compress and store using this method ?

It doesnt really matter if it is genuinely surplus energy, a bit like economy 7.

 

[Two on Tour]

It doesnt really matter if it is genuinely surplus energy, a bit like economy 7.

My interest was in what percentage of energy is used compared to energy output from the system. Efficiency of any generating system always matters and drives technology forwards.