Compressed air energy storage power generation device

Patent metadata

Field	Value
Publication number	US-10954852-B2
Application number	US-201816490612-A
Country	US
Kind code	B2
Filing date	Mar 23, 2018
Priority date	Mar 29, 2017
Publication date	Mar 23, 2021
Grant date	Mar 23, 2021

Abstract

This compressed air storage power generation device 10 is provided with: a power demand receiving unit 60 which receives in real-time the power demand value of consumer equipment 3; a power supply adjustment device 19 which adjusts the amount of power generated by a generator 15; and a control device which has a power generation amount control unit 17a for controlling the power supply adjustment device 19 so as to supply the consumer equipment 3 in a timely fashion with power corresponding to the power demand value received by the power demand receiving unit 60.

First claim

The invention claimed is:

1. A compressed air energy storage power generation device capable of accumulating renewable energy in a form of compressed air, generating power by using the compressed air as necessary, and supplying power to a consumer facility, comprising:
a power demand receiving unit which receives a power demand value of the consumer facility in real-time;
an electric motor driven by power generated by use of the renewable energy;
a compressor driven by the electric motor;
a pressure accumulation unit which accumulates the compressed air compressed by the compressor;
an expander driven by the compressed air supplied from the pressure accumulation unit;
a power generator driven by the expander;
a power adjustment unit which adjusts the amount of power generated by the power generator;
a control device having a power generation amount control unit which controls the power adjustment unit so as to supply the power according to the power demand value received by the power demand receiving unit to the consumer facility in a timely manner;
a cold heat demand receiving unit which receives a cold heat demand value of the consumer facility;
a first heat exchanger which cools a first heat medium by exchanging heat between the first heat medium and cold air exhausted from the expander;
a first heat medium storage unit which stores as cold heat the first heat medium cooled in the first heat exchanger; and
a cold heat adjustment unit which adjusts the supply amount of the cold heat from the first heat medium storage unit to the consumer facility;
wherein the control device further has a cold heat supply control unit which controls the cold heat adjustment unit so as to supply the cold heat according to the cold heat demand value received by the cold heat demand receiving unit to the consumer facility in a timely manner.

2. The compressed air energy storage power generation device according to claim 1 , wherein
the power adjustment unit includes an air supply capacity adjustment valve for adjusting the supply amount of the compressed air from the pressure accumulation unit to the expander; and
the power generation amount control unit of the control device adjusts the opening degree of the air supply capacity adjustment valve according to the power demand value and adjusts the power generation amount of the power generator.

3. The compressed air energy storage power generation device according to claim 2 , wherein
the power adjustment unit further includes a rotational speed changing device for changing rotational speed of the power generator; and
the power generation amount control unit of the control device adjusts the rotational speed of the power generator by the rotational speed changing device according to the power demand value and adjusts the power generation amount of the power generator.

4. The compressed air energy storage power generation device according to claim 2 , wherein
a plurality of the expanders are provided;
the power adjustment unit further includes an operating number changing device for changing operating number of the expanders; and
the power generation amount control unit of the control device adjusts the number of the expanders to be driven by the operating number changing device according to the power demand value and adjusts the power generation amount of the power generator.

5. The compressed air energy storage power generation device according to claim 2 , further comprising:
a hot heat demand receiving unit which receives a hot heat demand value of the consumer facility;
a second heat exchanger which heats a second heat medium by exchanging heat between the second heat medium and air discharged from the compressor;
a second heat medium storage unit which stores as hot heat the second heat medium heated in the second heat exchanger; and
a hot heat adjustment unit which adjusts the supply amount of the hot heat from the second heat medium storage unit to the consumer facility,
wherein the control device further has a hot heat supply control unit which controls the hot heat adjustment unit so as to supply the hot heat according to the hot heat demand value received by the hot heat demand receiving unit to the consumer facility in a timely manner.

6. The compressed air energy storage power generation device according to claim 1 , wherein
the power adjustment unit further includes a rotational speed changing device for changing rotational speed of the power generator; and
the power generation amount control unit of the control device adjusts the rotational speed of the power generator by the rotational speed changing device according to the power demand value and adjusts the power generation amount of the power generator.

7. The compressed air energy storage power generation device according to claim 1 , wherein
a plurality of the expanders are provided;
the power adjustment unit further includes an operating number changing device for changing operating number of the expanders; and
the power generation amount control unit of the control device adjusts the number of the expanders to be driven by the operating number changing device according to the power demand value and adjusts the power generation amount of the power generator.

Assignees

• Kobe Steel Ltd

Inventors

• Matsukuma Masaki
• Nagahira Ayaka

Classifications

• H02J15/30

  using storage of inertial or mechanical energy, e.g. using flywheels · CPC title

• H02J15/20

  using storage of pneumatic energy, e.g. compressed air energy storage [CAES] · CPC title

• F02C9/16 Primary

  Control of working fluid flow (F02C9/48 takes precedence; control of air-intake flow F02C7/057) · CPC title

• F02C1/02 Primary

  the working fluid being an unheated pressurised gas · CPC title

• Y02P90/50

  Energy storage in industry with an added climate change mitigation effect · CPC title