Patent ID: 8297056

Claim:
A system for storing energy and generating power comprising: At least two compressed gas storage devices comprising at least a first compressed gas storage device and at least a second compressed gas storage device, each of said gas storage devices having means for storing compressed gas and for controllably receiving and releasing said gas; at least two Electricity Pressure Mutual Converter means capable of generating power resulting from receiving a flow of gas, and compressing gas into the compressed gas storage devices resulting from supply of electrical power, said first compressed gas storage device having higher operating pressure than said second compressed gas storage device, said first compressed gas storage device and said second compressed gas storage device being connectable to one another by the first Electricity Pressure Mutual Converter and the second Electricity Pressure Mutual Converter being connectable to said second compressed gas storage device such that upon compression or release of gas from or to said first compressed gas storage device and from or to said second compressed gas storage device, gas flow proceeds such that the pressure drop across said first Electricity Pressure Mutual Converter and said second Electricity Pressure Mutual Converter is substantially equal for the duration of gas compression and expansion.