Device, system and method for isothermal compression, constant-pressure power generation and physical energy storage

Patent metadata

Field	Value
Publication number	US-12497941-B2
Application number	US-202418434103-A
Country	US
Kind code	B2
Filing date	Feb 6, 2024
Priority date	Feb 13, 2023
Publication date	Dec 16, 2025
Grant date	Dec 16, 2025

Abstract

A device for isothermal compression, constant-pressure power generation and physical energy storage includes an air storage tank, a weight, a piston and a piston rod. An inner cavity of the air storage tank is divided into first to third chambers by first and second heat conducting baffles. The piston is arranged in the second chamber. The piston rod has a lower end connected with the piston and an upper end connected with the weight. First and second elastic sealing belts are arranged in the first and third chambers, respectively. The first chamber includes a first water injection port and a first water outlet above the first elastic sealing belt, and the third chamber includes a second water injection port and a second water outlet above the second elastic sealing belt. A bottom of the air storage tank includes an air injection port and a compressed air outlet.

First claim

The invention claimed is:

1 . A device for isothermal compression, constant-pressure power generation and physical energy storage, comprising an air storage tank, a weight, a piston and a piston rod,
wherein an upper part of an inner cavity of the air storage tank is divided into a first chamber, a second chamber and a third chamber by a first heat conducting baffle and a second heat conducting baffle, lower parts of the first chamber, the second chamber and the third chamber are communicated, a cavity enclosed by the first heat conducting baffle and inner walls of the air storage tank is designated as the first chamber, a cavity enclosed by the first heat conducting baffle, the second heat conducting baffle and the inner walls of the air storage tank is designated as the second chamber, a cavity enclosed by the second heat conducting baffle and the inner walls of the air storage tank is designated as the third chamber, and the first chamber and the third chamber are symmetrical with respect to the second chamber; the piston is fitted and arranged in the second chamber and configured to move up and down, a lower end of the piston rod is connected with the piston, and an upper end of the piston rod penetrates the top of the air storage tank and is connected with the weight; an inclined first elastic sealing belt is arranged in the first chamber, upper and lower ends of the first elastic sealing belt are fixed, the first elastic sealing belt divides the first chamber into two chambers in an up-down direction, and a side wall of the first elastic sealing belt is in sealing contact with an inner wall of the first chamber and configured to slide relative thereto; a second elastic sealing belt is arranged in the third chamber, and the second elastic sealing belt and the first elastic sealing belt are symmetrically arranged with respect to the second chamber; the first chamber comprises a first water injection port and a first water outlet above the upper end of the first elastic sealing belt, and the third chamber comprises a second water injection port and a second water outlet above an upper end of the second elastic sealing belt; and a bottom of the air storage tank comprises an air injection port and a compressed air outlet.

2 . The device for isothermal compression, constant-pressure power generation and physical energy storage according to claim 1 , wherein a shape of the air storage tank is a cuboid, side surfaces of the air storage tank are sequentially designated as a first side surface, a second side surface, a third side surface and a fourth side surface, the first side is opposite to the third side, and the second side is opposite to the fourth side;
the first heat conducting baffle and the second heat conducting baffle are arranged between the first side surface and the third side surface, the first heat conducting baffle, the second heat conducting baffle, the first side surface and the third side surface are parallel to each other, the first heat conducting baffle and the second heat conducting baffle have the same height and thickness, and a distance between the first heat conducting baffle and the first side surface is equal to a distance between the second heat conducting baffle and the third side surface; a top surface, the second side surface and the fourth side surface of the air storage tank are hermetically connected with the first heat conducting baffle, and the top surface, the second side surface and the fourth side surface of the air storage tank are hermetically connected with the second heat conducting baffle; the upper end of the first elastic sealing belt is fixedly connected with the first side surface, the lower end of the first elastic sealing belt is fixedly connected with a lower end of the first heat conducting baffle, and two side surfaces of the first elastic sealing belt are in sealing contact with the second side surface and the fourth side surface, respectively; and an upper end of the second elastic sealing belt is fixedly connected with the third side surface, a lower end of the second elastic sealing belt is fixedly connected with a lower end of the second heat conducting baffle, and two side surfaces of the second elastic sealing belt are in sealing contact with the second side surface and the fourth side surface, respectively.

3 . The device for isothermal compression, constant-pressure power generation and physical energy storage according to claim 2 , wherein the first water injection port and the first water outlet are arranged on the first side surface and communicate with the first chamber; and
the second water injection port and the second water outlet are arranged on the third side surface and communicate with the third chamber.

4 . A system for isothermal compression, constant-pressure power generation and physical energy storage, comprising a power generation system, a water injection system, an air compressing system and a device for isothermal compression, constant-pressure power generation and physical energy storage, and the power generation system comprising at least one of a water turbine and an air turbine,
wherein the device for isothermal compression, constant-pressure power generation and physical energy storage, comprises an air storage tank, a weight, a piston and a piston rod, an upper part of an inner cavity of the air storage tank is divided into a first chamber, a second chamber and a third chamber by a first heat conducting baffle and a second heat conducting baffle, lower parts of the first chamber, the second chamber and the third chamber are communicated, a cavity enclosed by the first heat conducting baffle and inner walls of the air storage tank is designated as the first chamber, a cavity enclosed by the first heat conducting baffle, the second heat conducting baffle and the inner walls of the air storage tank is designated as the second chamber, a cavity enclosed by the second heat conducting baffle and the inner walls of the air storage tank is designated as the third chamber, and the first chamber and the third chamber are symmetrical with respect to the second chamber; the piston is fitted and arranged in the second chamber and configured to move up and down, a lower end of the piston rod is connected with the piston, and an upper end of the piston rod penetrates the top of the air storage tank and is connected with the weight; an inclined first elastic sealing belt is arranged in the first chamber, upper and lower ends of the first elastic sealing belt are fixed, the first elastic sealing belt divides the first chamber into two chambers in an up-down direction, and a side wall of the first elastic sealing belt is in sealing contact with an inner wall of the first chamber and configured to slide relative thereto; a second elastic sealing belt is arranged in the third chamber, and the second elastic sealing belt and the first elastic sealing belt are symmetrically arranged with respect to the second chamber; the first chamber comprises a first water injection port and a first water outlet above the upper end of the first elastic sealing belt, and the third chamber comprises a second water injection port and a second water outlet above an upper end of the second elastic sealing belt; and a bottom of the air storage tank comprises an air injection port and a compressed air outlet, wherein a water outlet of the water injection system is connected with the first water injection port and the second water injection port, a water inlet of the water turbine is connected with the first water outlet and the second water outlet, and an outlet of the air compressing system is connected with the air injection port; the air injection port is provided with a first valve, the first water injection port is provided with a second valve, the second water injection port is

Assignees

• Xian Thermal Power Res Inst Co
• Univ Northwestern Polytechnical

Inventors

• Jing Xiaolei
• Liu Cunliang
• Lin Yuwen
• Xu Dangqi
• Zhao Liang
• Liang Shuting

Classifications

• F15B2201/415

  Gas ports · CPC title

• F15B1/045

  Dead weight accumulators · CPC title

• F15B2201/42

  Heat recuperators for isothermal compression and expansion · CPC title

• F15B1/106

  characterised by the way housing components are assembled · CPC title

• F15B2201/413

  having multiple liquid ports · CPC title