CN-224229725-U - Oblique temperature energy storage container and compressed air energy storage system

Abstract

The utility model relates to the technical field of compressed air energy storage systems and related equipment, in particular to an inclined temperature energy storage container which comprises a container body, a diaphragm and a heat insulation plate, wherein one side of the heat insulation plate is attached to the outer surface of the diaphragm, the diaphragm divides the container body into a first cavity and a second cavity, the container body is of a horizontal structure, a piston mechanism is arranged in the container body and comprises a piston rod and a cylinder body, and the piston rod is rigidly connected with the other side of the heat insulation plate. In the operation process of the compressed air energy storage system, the inclined temperature energy storage container ensures that the heat insulation plate is attached to the diaphragm through the push-pull of the piston mechanism, and avoids the heat insulation plate from overturning, so that the heat exchange of one gas or liquid in a space with constant volume is ensured, and the heat exchange of the outside is reduced at different temperatures.

Inventors

• WU JIANNONG
• ZHU YANGYANG
• LIU YIQIANG
• XU WENBING
• LIAO JINLU
• XU YIQING

Assignees

• 浙江同景科技有限公司

Dates

Publication Date

20260512

Application Date

20250521

Claims (7)

1. 1. The utility model provides an oblique temperature energy storage container, includes container body, diaphragm and heat insulating board, the diaphragm separates the container body into first cavity and second cavity, heat insulating board one side is laminated mutually with the diaphragm surface, its characterized in that, the container body is horizontal structure, be equipped with piston mechanism in the first cavity of container body, piston mechanism includes piston rod and cylinder body, piston rod and heat insulating board opposite side rigid connection.
2. 2. The oblique temperature energy storage container as claimed in claim 1, wherein the cylinder body is of a nested structure, the outer cylinder body is fixedly connected with the container body, the inner cylinder body is sleeved in the outer cylinder body and is in sliding fit with the outer cylinder body, and the piston is limited in the inner cylinder body in a sliding mode.
3. 3. A diagonal temperature energy storage container according to claim 1 or 2 wherein the first chamber is for storing air and the second chamber is for storing carbon dioxide.
4. 4. An oblique temperature energy storage container as claimed in claim 1 or 2 wherein the diaphragm is a multi-layer composite structure comprising a pressure resistant layer in the middle and insulating layers on both sides.
5. 5. A compressed air energy storage system, which is characterized by comprising the inclined temperature energy storage container as claimed in any one of claims 1-4, wherein a first cavity of the inclined temperature energy storage container is communicated with an air compression energy storage subsystem and an air expansion energy release subsystem, and a second cavity of the inclined temperature energy storage container is communicated with an energy storage tank of a carbon dioxide gas-liquid conversion subsystem.
6. 6. The compressed air energy storage system of claim 5, wherein the energy storage tank comprises a tank body, a gas-liquid separation membrane is arranged in the tank body and is divided into a liquid cavity and an air cavity, the air cavity is communicated with the second cavity, and the liquid cavity is communicated with the second cavity through a circulating pump and a heat exchanger.
7. 7. The compressed air energy storage system of claim 6, wherein the gas-liquid separation membrane of the tank is provided with an insulation plate, and the insulation plate is slidingly connected with the tank.

Description

Oblique temperature energy storage container and compressed air energy storage system Technical Field The utility model relates to the technical field of energy storage systems and related equipment, in particular to an oblique temperature energy storage container and a compressed air energy storage system. Background The compressed air energy storage technology refers to an energy storage mode that electric energy is used for compressed air in a grid load low-valley period, and the compressed air is released to push power generation in a grid load peak period. The container for storing the gas is the key of the compressed air energy storage technology. The prior constant pressure system technology needs to heat up the medium in the container at equal pressure to cause volume change to meet the constant pressure requirement, and the dynamic change caused by the temperature change of the medium to be heat-exchanged in the container is unfavorable for control. Therefore, related personnel can effectively block heat exchange by adding the heat insulation device to isolate the diaphragm from exchanging heat, but the heat insulation device is balanced by the weight of the heat insulation device and is only suitable for an upright container, and when the heat insulation device is applied to a horizontal container, the moving process of the heat insulation device has the risk of overturning, so that the heat insulation device needs to be improved. Disclosure of Invention The application aims to overcome the defects of the related art and provide an inclined temperature energy storage container and a compressed air energy storage system, wherein the inclined temperature energy storage container can reduce the heat exchange of one gas or liquid in a space with constant volume at different temperatures. The technical scheme includes that the inclined temperature energy storage container comprises a container body, a diaphragm and a heat insulation plate, wherein the diaphragm separates the container body into a first cavity and a second cavity, one side of the heat insulation plate is attached to the diaphragm, the container body is of a horizontal structure, a piston mechanism is arranged in the first cavity of the container body, the piston mechanism comprises a piston rod and a cylinder body, and the piston rod is rigidly connected with the other side of the heat insulation plate. Compared with the related art, the inclined temperature energy storage container body with the piston type heat insulation structure has the following advantages: 1. the dynamic pressure is balanced, the stability is high, the diaphragm moves in real time along with the change of the volume of a working medium through the linkage design of the piston mechanism and the heat insulation plate, the pressure fluctuation is automatically compensated, and the pressure in the container body is always kept constant (such as 1.5 MPa) in the energy storage (inflation) and energy release (exhaust) processes, no external pressure regulating equipment is needed, so that the running stability of the system is remarkably improved. 2. The heat insulation plate and the diaphragm are in contact only on the minimum plane, so that the physical isolation and the thermal isolation between working media are realized. 3. The structure is compact, the system integration is simplified, the horizontal container body and the piston are integrally designed, a traditional complex external transmission mechanism is omitted, the equipment volume is reduced, and the underground burying or the space limited scene application is facilitated. Through the working medium circulation and pressure linkage of the two container bodies, the automatic balance of the whole pressure and the temperature of the energy storage system is realized, and the dependence of a pump valve assembly is reduced. 4. The safety is enhanced, the pressure relief and sealing redundancy are realized, when the diaphragm is broken, the piston mechanism can limit the mixing range of working media, and the multi-layer sealing structure provides double protection. The risk of diaphragm bursting caused by pressure unbalance is avoided, and the industrial safety standard is met. Preferably, the cylinder body is of a nested structure, the outer cylinder body is fixedly connected with the container body, the inner cylinder body is sleeved in the outer cylinder body and is in sliding fit with the outer cylinder body, and the piston is limited in the inner cylinder body in a sliding mode. The piston can freely slide in the inner cylinder body, the inner cylinder body can freely slide in the outer cylinder body, the two-stage cylinder body design can enlarge the stroke of the piston rod, namely, the sliding distance of the heat insulation plate is prolonged, so that the contraction range of the diaphragm is enlarged, namely, the volume change amount of the first cavity and the volume change amount of the second cav