Wave power generation system

Patent metadata

Field	Value
Publication number	US-11473552-B2
Application number	US-201917254529-A
Country	US
Kind code	B2
Filing date	Feb 6, 2019
Priority date	Aug 2, 2018
Publication date	Oct 18, 2022
Grant date	Oct 18, 2022

Abstract

A wave power generation system includes: a hydraulic pump device configured to operate by force of a wave to discharge an operating liquid to a main passage; a hydraulic motor device configured to be rotated by the operating liquid flowing through the main passage; a power generator configured to be driven by the hydraulic motor to generate electric power; and a heat exchanger device configured to perform heat exchange of the operating liquid. The heat exchanger device includes a heat exchange motor device connected to the main passage through a sub passage and configured to be operated by the operating liquid introduced through the sub passage, a refrigerant pump device driven by the heat exchange motor device and configured to suck and discharge a refrigerant liquid, and a heat exchanger to which the refrigerant liquid discharged from the heat exchange pump device and the operating liquid are introduced.

First claim

The invention claimed is:

1. A wave power generation system comprising:
a hydraulic pump device configured to operate by force of a wave to discharge an operating liquid to a main passage;
a hydraulic motor device configured to be rotated by the operating liquid flowing through the main passage;
a power generator configured to be driven by the hydraulic motor device to generate electric power; and
a heat exchanger device configured to perform heat exchange of the operating liquid, wherein
the heat exchanger device includes
a heat exchange motor device connected to the main passage through a sub passage and configured to be operated by the operating liquid introduced through the sub passage,
a refrigerant pump device driven by the heat exchange motor device and configured to pump up sea water from the sea and discharge the sea water as a refrigerant liquid, and
a heat exchanger to which the refrigerant liquid discharged from the refrigerant pump device and the operating liquid are introduced, the heat exchanger being configured to perform heat exchange between the refrigerant liquid and the operating liquid to cool the operating liquid.

2. The wave power generation system according to claim 1 , further comprising a controller configured to control an operation of the heat exchanger device, wherein:
the heat exchanger device includes
a liquid temperature sensor configured to detect a temperature of the operating liquid and
a refrigerant flow regulating valve provided at a refrigerant passage through which the refrigerant liquid discharged from the refrigerant pump device is introduced to the heat exchanger, the refrigerant flow regulating valve being configured to adjust, in accordance with an adjustment command input to the refrigerant flow regulating valve, a flow rate of the refrigerant liquid flowing through the refrigerant passage; and

the controller outputs the command to the refrigerant flow regulating valve based on a detection result of the liquid temperature sensor to adjust the flow rate of the refrigerant liquid flowing through the refrigerant passage.

3. The wave power generation system according to claim 1 , wherein the heat exchanger device further includes a heat exchange flow control valve provided at the sub passage and configured to limit the flow rate of the operating liquid flowing through the sub passage to a predetermined flow rate or less.

4. The wave power generation system according to claim 1 , wherein the heat exchanger is interposed on a tank passage connecting the hydraulic motor device and a tank.

5. The wave power generation system according to claim 2 , wherein the heat exchanger device further includes a heat exchange flow control valve provided at the sub passage and configured to limit the flow rate of the operating liquid flowing through the sub passage to a predetermined flow rate or less.

6. The wave power generation system according to claim 2 , wherein the heat exchanger is interposed on a tank passage connecting the hydraulic motor device and a tank.

7. The wave power generation system according to claim 3 , wherein the heat exchanger is interposed on a tank passage connecting the hydraulic motor device and a tank.

8. The wave power generation system according to claim 5 , wherein the heat exchanger is interposed on a tank passage connecting the hydraulic motor device and a tank.

Assignees

• Univ Tokyo
• Kawasaki Heavy Ind Ltd

Inventors

• Maruyama Koki
• Rheem Chang-Kyu
• Kobayashi Hidetaka
• Kuribayashi Naoki
• Tanaka Hideki
• Tsuji Masahide

Classifications

• F03B13/182 Primary

  with a to-and-fro movement · CPC title

• F03B13/22 Primary

  using the flow of water resulting from wave movements to drive a motor or turbine {(F03B13/144 takes precedence)} · CPC title

• Y02E10/30

  Energy from the sea, e.g. using wave energy or salinity gradient · CPC title

• F05B2260/232

  characterised by the cooling medium · CPC title

• F05B2220/706

  an electrical generator · CPC title