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Energy Storage Technique's Comparison of Efficiency and Energy Density

Energy Storage Technique's Comparison of Efficiency and Energy Density

Energy storage technologies are commonly classified according to storage principle, or family. There are four energy storage families. The members of a family may change in accordance with technological evolutions. Therefore, the examples in each category should not be seen as an exhaustive list of potential family members.

Energy Storage Techniques: Comparison of Efficiency and Energy Density

Techniques

Efficiency

Energy Density

Mechanical

Liquid air energy storage with heat recovery

21.6- 56.9%

107 kWh/m3

Compressed air energy storage

42- 54%

2- 6 kWh/m3

Pumped hydro energy storage

70- 85%

0.28 kWh/m3

 

Electrochemical

Lithium ion batteries

>90%

300 kWh/m3

Sodium sulphurate batteries

89%

 

150- 250 kWh/m3

Lead acid batteries

85%

70 kWh/m3

 

Redox flow batteries

75- 85%

25- 35 kWh/m3

 

Chemical

 

Hydrogen    

20-50%

160 kWh/m3

 

Methane

28- 45%

6.5 kWh/m3

 

Thermal

Sensible heat storage

50- 90%

25 kWh/m3

 

Latent heat storage

75- 90%

100 kWh/m3

 

Thermo-chemical energy storage

75-100%

120-250 kWh/m3

 

 

Dr. Amal Khashab's picture

Thank Dr. Amal for the Post!

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Discussions

Matt Chester's picture
Matt Chester on Feb 18, 2020 3:28 pm GMT

Do you see any of these technologies as imminently improving in an appreciable way that will make their numbers look even better?

Dr. Amal Khashab's picture
Dr. Amal Khashab on Feb 18, 2020 9:31 pm GMT

I beleive that Liquid air energy storage with heat recovery technique (LAES) is candidate to be improved more better . Buty of LAES is small area needed for a project. Can you immagine an area of (90m X 30m) is sufficient for (25MW/112.5MWh)  LAES project ?

 

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