US 2019/0170026 A1Published application

Compressed air energy storage and power generation device and compressed air energy storage and power generation method

AssigneeKabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)

InventorsMasaki MATSUKUMA, Hiroki SARUTA, Kanami SAKAMOTO

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Abstract

A compressor compresses air in such a manner that a motor is driven by renewable energy. An accumulator tank stores the air thus compressed. An expander is driven by the compressed air. A generator is mechanically connected to the expander. A first heat exchanger recovers compressed heat. A heat medium tank that stores a heat medium. A second heat exchanger that heats the compressed air. A first pump adjusts an amount of the heat medium to be supplied to the first heat exchanger. A control device controls the first pump to adjust the amount of heat medium to be supplied to the first heat exchanger so as to maintain the heat medium, which is stored in the heat medium tank, at a predetermined first temperature.

Claims18

Dependent claims

A compressed air energy storage and power generation device comprising:

an electric motor driven by fluctuating input power;
a compressor that is mechanically connected to the electric motor and compresses air;
an accumulator tank that is fluidly connected to the compressor and stores the air compressed by the compressor;
an expander that is fluidly connected to the accumulator tank and is driven by the compressed air supplied from the accumulator tank;
a generator that is mechanically connected to the expander and generates power;
a first heat exchanger for heating a heat medium by performing heat exchange between the heat medium and the air compressed by the compressor;
a heat medium tank that is fluidly connected to the first heat exchanger and stores the heat medium;
a second heat exchanger that is fluidly connected to the heat medium tank and serves for heating the compressed air by performing heat exchange between the heat medium supplied from the heat medium tank and the compressed air supplied to the expander;
a first flow rate adjusting means for adjusting an amount of the heat medium supplied to the first heat exchanger;
and
a control device that adjusts an amount of the heat medium supplied to the first heat exchanger by the first flow rate adjusting means so as to maintain the heat medium stored in the heat medium tank at a predetermined first temperature.

8 more elements

A compressed air energy storage and power generation method comprising:

driving an electric motor by fluctuating input power;
compressing air by a compressor mechanically connected to the electric motor;
storing the compressed air, which is supplied from the compressor, in an accumulator tank;
driving an expander by the compressed air supplied from the accumulator tank;
generating power by a generator mechanically connected to the expander;
raising a temperature of the heat medium by performing heat exchange between the heat medium and the compressed air, which is compressed by the compressor, in a first heat exchanger;
storing the heat medium, whose temperature has risen by the first heat exchanger, in a heat medium tank;
and
raising a temperature of the compressed air, which is supplied from the accumulator tank, by performing heat exchange between the heat medium, which is supplied from the heat medium tank, and the compressed air in a second heat exchanger, and supplying the compressed air, whose temperature has risen, to the expander,
wherein an amount of the heat medium supplied to the first heat exchanger is adjusted by a first flow rate adjusting means so as to maintain the heat medium, which is stored in the heat medium tank, at a predetermined first temperature.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/571,672Filed 27 Apr 2016
Priority: JP 2015-0953908 May 2015
Published: 6 Jun 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification20 codes

F01K 27/00
Plants for converting heat or fluid energy into mechanical energy, not otherwise
F01K 3/02
Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein: use of accumulators and specific engine…
F01K 3/12
Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein: having two or more accumulators
F01K 27/02
Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for: plants modified to use their waste heat, other than…

Family

US 10,655,505 B2Related patent
US 2019/0170026 A1This patent

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