DESC:TECHNICAL FIELD
[0001] The present disclosure generally relates to a means store electric power till infinity without any storage loss. In particular, the present disclosure relates to a means to store generated electric power using a specially designed collapsible pressure tube.

BACKGROUND
[0002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[0003] Electric power generation and storage is an important topic of research, and advances in this field has wide-ranging implications. While there are many means to generate electric power, their storage is typically handled by banks of batteries. Batteries are susceptible to many limitations, such as higher capital and maintenance costs, complex circuits may be required to operate the batteries, batteries have to be maintained under a narrow range of conditions, battery materials generally have a high ecological impact.
[0004] Other electric power storage systems exist, such as thermal, storage, mechanical storage, and pumped hydroelectric storage. These modes are complex, and expensive. Further, such methods are difficult to scale to different levels.
[0005] There is, therefore, a requirement for a means to store electric power that is economical, and scalable.

OBJECTS OF INVENTION
[0006] The primary objective of this patent application is to introduce an innovative method for the storage and supply of electric power, utilizing pressurized liquid in combination with various liquid-driven turbine technologies. These include, but are not limited to, Pelton, Francis, impulse, and reaction turbines, as well as any other systems suitable for transforming pressurized liquid into electricity in a highly efficient and controlled manner. This invention is designed to address the challenge of storing intermittent energy generated from renewable sources like solar and wind, as well as surplus energy available at the grid or from any standalone or independent energy generator. These generators may draw from a wide array of sources such as hydro, thermal, hydrokinetic, biofuel, geothermal, nuclear, and more. By integrating an artificially created, collapsible pressure vessel, this system enables the conversion of excess or intermittent energy into storable potential energy. This vessel can be subjected to an artificial increase in pressure by leveraging dense materials, including stone, metals, non-metals, composite materials, dense liquids, or any substance capable of effectively increasing the vessel’s internal pressure. This design allows for the efficient capture and storage of large amounts of energy for later use, especially during peak demand periods or when an immediate need for electricity arises over a fixed time frame.
[0007] Another core objective is to establish a storage solution that ensures a steady, non-intermittent supply of electric power, supporting long-duration energy storage in bulk without energy losses. This capability for extended storage addresses and resolves limitations common to chemical-based storage methods like batteries, which can degrade over time or suffer from energy loss. By leveraging fundamental scientific principles—such as pressure, density, force, head, and gravity—rather than relying on chemical reactions, this invention mitigates issues related to lifespan constraints, environmental impacts, and loss of stored energy. This non-chemical approach promotes an energy storage solution that is robust, sustainable, and environmentally friendly.
[0008] The invention also emphasizes a highly replicable and scalable design, making it suitable for deployment across diverse locations and applications. Its scalable nature supports sustainable and economical implementation at virtually any scale required, making it viable for both large and small-scale needs. Additionally, it does not depend on location-specific resources, allowing it to be deployed in a wide range of environments—from densely populated urban areas to remote rural locations—thereby enhancing its adaptability and accessibility.
[0009] Further, the invention is built on a “plug-and-play” concept, underscoring ease of installation and user adaptability. Components for this energy storage system can be constructed from a wide range of materials, including concrete, fly ash, composite materials, wood, plywood, and steel, or other locally available materials capable of holding pressurized liquid and facilitating on-demand power generation. This versatility makes the system practical for resource-constrained environments, suitable for various settings from industrial facilities to residential areas. By enabling the use of locally sourced materials, the system reduces transportation costs, boosts local economies, and ensures a simple yet effective plug-and-play setup that integrates seamlessly with existing infrastructure or renewable energy sources. This adaptability and modularity enhance operational ease and minimize complexity, ensuring straightforward deployment and use.
[0010] In summary, this patent application seeks to establish a durable, efficient, and scalable energy storage system that harnesses pressurized liquid for reliable electricity generation, independent of chemical processes. The system offers a consistent base-load power source, reducing reliance on traditional storage methods and advancing sustainable energy practices. Its flexibility in material choice and construction allows for universal application, providing a versatile solution to the growing need for energy storage and the balancing of electricity supply and demand.

SUMMARY
[0011] The present invention outlines a unique system designed for storing and generating electric power by using pressurized liquid, functioning as a sustainable, chemical-free energy storage solution. This technology essentially operates as a battery alternative that supports an infinite number of charging and discharging cycles without degradation. The system comprises a collapsible, inflatable tank, which can be formed in various shapes (tube, rectangular, or any adaptable shape) to store pressurized liquid—such as water, oil, or any fluid capable of driving a turbine—that can be re-used multiple times. The liquid is pressurized by an electric-driven pump or hydraulic system, which fills the tank, accumulating energy proportional to the input energy used for pressurization.
[0012] The collapsible tank is designed to maintain high pressure, acting as a charge accumulator. Heavy weights, potentially several hundred tons, are positioned atop the tank on a platform to maintain and increase the pressure inside. An outlet nozzle at the bottom of the tank enables controlled discharge of pressurized liquid to a turbine, converting the stored pressure energy back into electricity. Once discharged, the liquid can be collected in a reservoir or pond and pumped back into the tank, enabling repeated use without resource waste.
[0013] The tank is supported within a sliding frame with pillars, ensuring stability and maintaining constant pressure as liquid discharges. The sliding frame allows the weight to descend in coordination with the tank's decreasing height, preserving continuous pressure for power generation. This feature allows for high-capacity energy storage without requiring significant height for gravitational pressure, making it suitable for locations with limited vertical space. The system is designed for scalability, allowing installations alongside various water sources like irrigation canals, rivers, ponds, or even wastewater storage areas, as it leverages fluid-powered turbines to convert stored pressure energy into electricity.
[0014] To optimize cost and storage capacity, multiple collapsible tanks can be housed within a single frame, all pressurized by a shared weight platform. For enhanced safety and pressure endurance, the tank design may incorporate slidable, cylindrical structures similar to hydraulic jacks. This setup can be automated using various control systems, including PLCs, microcontrollers, or mobile applications, allowing for easy management of pressurization cycles.
[0015] The system includes a pressurizing pump fluidly connected to a liquid source, and multiple pumps may serve either a single tank or a series of tanks. To prevent leakage and energy loss, tanks can be secured with robust materials like chains or wires. This multi-tank, single-turbine approach reduces installation costs while maximizing efficiency. The discharge rate of the pressurized liquid, and thus the power output, can be adjusted by controlling the nozzle diameter. Once pressurized, the tank can maintain this state indefinitely unless there are leaks or changes in external conditions, and the tank can even be installed in underground spaces to reduce land use.
[0016] The system offers flexibility in utility-scale applications, with separate configurations for charging and discharge. This allows for uninterrupted power supply to the grid, even during charging, and supports multiple charge-discharge cycles daily to meet varying energy needs. The energy produced can be supplied to different grid types (local, state, national, or off-grid setups) or used for applications such as EV charging stations.
[0017] In certain embodiments, the fluid utilized may include water, seawater, wastewater, or any suitable flowing liquid. The system may integrate a power module to generate electricity from the controlled discharge, connecting it to the grid as needed. Additionally, the power source for the pressurizing pump may include various energy sources—solar, wind, hydro, geothermal, nuclear, fossil fuel, biofuel, and more—enhancing the system's sustainability.
[0018] Pressure regulation is managed by a controller that operates the pump, ensuring efficient and safe pressurization. The system may incorporate different structural supports or use springs to replace heavy weights, further lowering costs. Magnetic principles, like electromagnetism or permanent magnets, could also be used to achieve liquid pressurization, and surface hydrokinetic turbines can be employed within the setup.
[0019] The inventive design provides a flexible, scalable, and long-lasting energy storage solution, suitable for various environments and capable of integrating with existing grid systems, offering a promising alternative to conventional energy storage methods like chemical batteries or pumped storage.

BRIEF DESCRIPTION OF DRAWINGS
[0020] The accompanying drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.
[0021] FIG. 1 illustrates a schematic representation of a layout of a power storage unit consisting of Pressurized water tube shell, fitted inside a sliding tower unit having charge tower unit mounted on the platform supported by collapsible pressurized water tube.
[0022] FIG. 2 illustrates a schematic view of a water/liquid source (canal).
[0023] FIG. 3 illustrate a stone based charge Tower Unit which is acting as a pressurizing system to pressurize the collapsible pipe.
[0024] FIG. 4 illustrate the complete energy storage set-up proposed consists of but not limited to collapsible pressure tube, sliding tower, etc. in the art.

ADVANTAGES OF INVENTION
[0025] The present invention discloses a unique and versatile system for storing and supplying electric power using pressurized liquid. This system operates as a highly efficient, chemical-free, infinitely rechargeable “battery,” capable of undergoing unlimited charging and discharging cycles without degradation. It uses liquid pressure stored in a collapsible, inflatable tank, which can be made from any suitable collapsible material and configured in various shapes (tube, rectangular, or otherwise). This tank holds pressurized liquid (e.g., water, oil, or other reusable fluid) driven by an electric-powered liquid compressor or hydraulic pump. The system enables large-scale energy storage by utilizing liquid-driven turbines—such as hydraulic, reaction, or impulse turbines—to efficiently convert pressurized liquid energy into electricity on demand.

Key Advantages and Features:
1. High Efficiency: The system is engineered to achieve high energy conversion efficiency by employing a suitable hydraulic or reaction/impulse turbine. This minimizes energy losses and optimizes the power output, ensuring maximum utilization of stored energy.
2. Eco-Friendly Operation: Unlike traditional battery storage, this invention does not rely on chemical reactions, eliminating environmental risks associated with chemical waste, degradation, and toxic by-products. It leverages basic principles of physics—pressure, density, force, and gravity—to store and generate power, making it a sustainable and green solution.
3. Sustainable and Economical: By utilizing locally available materials for tank construction, such as concrete, steel, or composite materials, and by allowing the use of widely available fluids, this system reduces overall costs and promotes sustainability. The scalability of the design makes it economically viable for applications ranging from small-scale to large-scale energy storage projects, addressing energy needs in both developed and developing regions.
4. Flexible Location: The system is versatile in terms of where it can be installed. Its design enables installation at virtually any location, including remote areas, urban sites, or even underground or in caves to save surface land use. It can also be adapted to various water sources like rivers, irrigation canals, ponds, and wastewater channels, broadening its applicability.
5. Infinitely Rechargeable: Unlike conventional batteries, this system supports an infinite number of charge-discharge cycles without the risk of energy loss over time or capacity degradation. This extended lifecycle significantly reduces replacement costs and makes it an ideal long-term storage solution.
6. Constant Pressure and Continuous Power Supply: The system’s sliding frame and heavy weight platform maintain constant pressure within the tank as the liquid discharges, ensuring a continuous, steady supply of electricity. This feature makes it a reliable base-load power source, capable of delivering consistent energy on demand and enhancing grid stability.
7. Plug-and-Play Installation: Designed as a plug-and-play system, the technology offers ease of installation and adaptability to existing infrastructure. Components can be assembled from readily available materials like concrete, fly ash, wood, or steel, allowing for efficient and cost-effective setup even in resource-limited areas.
8. Modular and Scalable Design: The system’s modularity allows for expansion based on energy requirements. Multiple collapsible tanks can be housed within a single frame, all pressurized by a shared weight platform. This design supports scaling from megawatt to gigawatt storage capacities, making it suitable for diverse applications, from small communities to large utility-scale installations.
9. Automated Operation: Automation options—such as PLCs, microcontrollers, mobile apps, and web applications—allow for seamless control of pressurization, discharge cycles, and monitoring, ensuring operational efficiency. The system can operate with minimal manual intervention and adapt to real-time energy demand.
10. Power-on-Demand: This system is designed to supply power whenever needed, regardless of the charging cycle, ensuring on-demand availability. Its dual functionality—one system for charging (filling the tank with pressurized liquid) and another for discharging—enables flexibility in power supply, even during active charging.
11. Multiple Power Source Compatibility: The pressurizing pump can be powered by various renewable and non-renewable energy sources, including solar, wind, hydro, geothermal, nuclear, and even conventional power sources like diesel or biofuel. This compatibility with different power sources enhances the system’s adaptability and sustainability.
12. Safety and Reliability: The system incorporates safeguards, such as chains, wires, or specialized materials, to prevent sudden bursts or leaks of pressurized liquid. This ensures the system’s durability and prevents power loss, making it a safe and reliable solution for long-term energy storage.
13. Land Use and Installation Cost Savings: The collapsible tank can be installed underground or within natural structures like caves, allowing for reduced land use. The option to replace heavy weights with springs or use magnetic pressurization further lowers costs, providing a flexible, cost-effective setup.
14. Wide Range of Fluid Compatibility: The system is designed to work with various types of fluids, including fresh water, seawater, wastewater, and other flowable liquids, expanding the range of possible applications. This adaptability allows the system to harness otherwise untapped resources for power storage.
15. Extended Grid Integration and EV Charging: The electric power generated from the system can be seamlessly transmitted to local, state, or national grids, as well as to off-grid or micro-grid setups. This compatibility extends to applications like EV charging stations, providing a renewable, sustainable charging solution.
16. Reduction in Carbon Footprint: By supporting renewable energy sources and minimizing reliance on conventional battery storage, this system contributes to significant reductions in greenhouse gas emissions, making it an effective solution for climate-conscious energy management.
17. Adaptability for Utility-Scale Storage: With the potential to serve as a long-duration, bulk energy storage solution, this invention is ideal for utility-scale applications, supporting the consistent supply of energy to large grids and enabling efficient demand management.
18. Enhanced Discharge Control: The system’s nozzle can adjust the discharge rate, offering fine-tuned control over energy output. This feature allows for efficient power generation tailored to specific grid or consumer needs.
[0026] In conclusion, this patent application provides an innovative, eco-friendly, and highly adaptable energy storage and supply system that utilizes pressurized liquid to generate electricity. With advantages such as infinite rechargeability, high efficiency, sustainable operation, wide location applicability, cost-effectiveness, and enhanced grid integration, this invention represents a revolutionary step forward in energy storage technology. Its diverse applications make it suitable for both small and large-scale deployments, providing a scalable, reliable solution to modern energy demands and contributing to global sustainability goals.
Comparative Advantages of the Patent Technology Over Existing Energy Storage Solutions
[0027] The present invention represents a transformative advancement in energy storage by utilizing pressurized liquid in a collapsible tank to generate and store electricity, offering distinct benefits over traditional energy storage solutions. Below is a comparative analysis of this technology’s advantages over other prominent storage methods, including chemical battery energy storage, conventional pump storage, flywheel-based storage, supercapacitor-based storage, gravity-based storage, and thermal energy storage.
1. Chemical Battery Energy Storage:
o Infinite Charge-Discharge Cycles: Unlike chemical batteries, which degrade over repeated cycles and need periodic replacement, this pressurized liquid storage system supports unlimited charge-discharge cycles without loss of capacity, significantly reducing maintenance and replacement costs.
o Eco-Friendly and Non-Toxic: Chemical batteries involve hazardous materials and produce toxic waste, posing environmental and disposal challenges. This system, however, is chemical-free and environmentally benign, avoiding the ecological impact associated with battery disposal and recycling.
o Higher Efficiency and Safety: The absence of chemical reactions reduces the risk of overheating or thermal runaway, enhancing system safety. Additionally, it can operate at a higher efficiency than chemical batteries, which typically have an efficiency range of 60–90%.
o Reduced Environmental Footprint: This system leverages locally available materials and fluids, minimizing the carbon footprint compared to chemical battery manufacturing, which is resource-intensive and environmentally taxing.
2. Conventional Pump Storage:
o Scalability and Location Flexibility: Conventional pump storage requires specific geographical features (e.g., elevation differences, large water reservoirs). This pressurized liquid system can be implemented anywhere, including urban areas, underground, or on flat terrains, offering far greater flexibility in installation locations.
o Cost and Resource Efficiency: Conventional pump storage involves massive infrastructure and high costs for construction and land use. This invention’s modular and collapsible tank design requires less infrastructure, making it more economical and suitable for both small-scale and large-scale installations.
o Higher Safety and Adaptability: Conventional pumped storage projects can face environmental challenges related to water resource use and ecological impacts on surrounding habitats. This system reduces these challenges by using closed-loop pressurized tanks with reusable fluid.
3. Flywheel-Based Energy Storage:
o Longer Storage Duration: Flywheel systems are typically suited for short-term, high-power applications due to energy dissipation over time. This pressurized liquid system allows for long-duration energy storage without significant energy loss, making it more suitable for applications requiring sustained power output.
o Higher Capacity Scaling: Flywheel systems have limitations on energy capacity scaling due to physical constraints on rotor mass and speed. In contrast, this pressurized system can scale from small to utility-sized capacities by adding additional tanks, without a corresponding increase in mechanical complexity.
o Reduced Maintenance and Operational Simplicity: Flywheels involve high-speed rotational components, requiring frequent maintenance and precise balancing. This system, with no moving parts other than pumps and turbines, is simpler to maintain, enhancing durability and reducing operational costs.
4. Supercapacitor-Based Energy Storage:
o Longer Storage Time: Supercapacitors are excellent for rapid charge-discharge cycles but lack long-duration storage capacity, as they tend to discharge quickly. The pressurized liquid technology can store energy over extended periods, allowing for both short-term and long-term storage needs.
o Scalability and Cost Effectiveness: Supercapacitors are costly and complex to scale for large capacities. This system’s scalable and modular design allows for economical expansion to meet larger storage requirements without a corresponding rise in cost.
o Environmentally Friendly Alternative: Supercapacitors often rely on rare or toxic materials, presenting environmental risks. The pressurized liquid system, being composed of accessible, non-toxic materials, presents a more sustainable solution.
5. Gravity-Based Energy Storage:
o Higher Energy Density and Reduced Space Requirement: Traditional gravity storage systems depend on lifting heavy masses over substantial heights, requiring significant land and height. This invention achieves comparable energy density by pressurizing liquid within compact, collapsible tanks, reducing land usage and installation footprint.
o Broader Applicability and Ease of Installation: Gravity systems require considerable height or elevation, which limits their applicability. This pressurized system does not depend on elevation, making it feasible for installation in urban, flat, or even underground locations.
o Modular, Scalable, and Adaptable Design: Expanding gravity-based systems often involves complex construction. This pressurized liquid storage can be scaled by simply adding more tanks within an existing frame, allowing for adaptable and scalable energy storage solutions.
6. Thermal Energy Storage:
o Immediate and Flexible Power Conversion: Thermal storage involves converting energy into heat, which then requires further conversion back to electricity, resulting in inefficiencies. The pressurized liquid system converts stored energy directly to electricity via turbines, reducing conversion losses and improving efficiency.
o Higher Efficiency and Lower Energy Loss: Thermal storage systems suffer from heat dissipation and inefficiency over time. In contrast, pressurized liquid storage retains energy in the form of liquid pressure without significant loss, preserving more energy for long-term applications.
o Broad Energy Source Compatibility: Thermal systems are often tied to specific applications, such as solar thermal. The pressurized liquid system can be integrated with various renewable and conventional energy sources, including solar, wind, hydro, nuclear, and biofuels, making it more versatile.

Summary of Comparative Advantages
[0028] The pressurized liquid energy storage system introduced in this patent combines the best attributes of multiple energy storage technologies while addressing their inherent limitations. Its environmentally friendly, chemical-free operationoffers a sustainable alternative to batteries and supercapacitors, while its flexibility in installation makes it superior to conventional pump storage, gravity storage, and thermal storage in terms of location adaptability. The scalable, modular design allows it to meet energy needs from small installations to utility-scale projects, while reliable long-duration storage capability surpasses the short-term focus of flywheel and supercapacitor systems. The simple and safe design reduces maintenance needs, enabling long-term, cost-effective energy storage. In essence, this technology presents a robust, efficient, and versatile solution to meet the growing demand for sustainable energy storage across diverse applications and settings.
,CLAIMS:1. A system for electric power storage and generation, the system comprising:
• one or more Collapsible Pressure Tubes/Shells (1) configured for liquid storage, wherein each collapsible pressure tube/shell can be constructed in any shape, size, material, and capacity, and adapted to withstand high-pressure conditions;
• a Sliding Tower (2) that supports the collapsible pressure tube/shell, wherein the sliding tower is constructed from any material, in any shape, size, or capacity, and is configured to allow movement as liquid is discharged or stored within the tube/shell;
• a Platform (4) atop the sliding tower, made from any material, shape, size, or capacity, to support a Charge Tower Unit (3) that applies pressure to the collapsible tube/shell to maintain pressurized conditions within;
• a Pressurizing System (6) which is configured to pump liquid into the collapsible pressure tube/shell, where the pressurizing system can be operated electrically, manually, or by other means, adapted to store energy by pressurizing the liquid within the tube/shell;
• an Intake (5) connected to the pressurizing system to fill the collapsible pressure tube/shell with liquid; and
• a Discharge Nozzle (8) fitted at the base of the collapsible pressure tube/shell, which releases pressurized liquid into a Pressure-to-Electricity Conversion System (7) containing one or more turbines configured to generate electricity from the pressurized liquid.
2. The system of claim 1, wherein the pressure-to-electricity conversion system (7) is configured to:
• utilize various types of liquid-driven turbines, including hydraulic, reaction, impulse, or other suitable turbines for converting pressurized liquid into electricity.
3. The system of claim 1, wherein the generated electric power is supplied to an Electric Power Grid (10) or distributed to off-grid, micro-grid, or direct consumer applications.
4. The system of claim 1, wherein the Collapsible Pressure Tube/Shell (1) is designed to be scalable and modular, allowing for expansion by incorporating additional pressure tubes/shells into the sliding tower.
5. The system of claim 1, wherein the Sliding Tower (2) includes a mechanism for allowing the platform (4) to descend or ascend as the collapsible pressure tube/shell fills or discharges, ensuring constant pressure is applied to the liquid stored within.
6. The system of claim 1, further comprising:
• Multiple Collapsible Pressure Tubes/Shells (1) that can be housed within a single sliding tower (2) and pressurized via a single platform (4) and charge tower unit (3).
7. The system of claim 1, wherein the Platform (4) and Charge Tower Unit (3) use dense materials or any other weight-applied mechanism to apply the required pressurization to the collapsible pressure tube/shell, maintaining consistent pressure during discharge.
8. The system of claim 1, wherein the Pressurizing System (6) is automated using programmable logic control (PLC), microcontrollers, or compatible mobile or web applications to regulate the pressurization process.
9. The system of claim 1, wherein the Discharge Nozzle (8) is adjustable, allowing for control of the discharge rate and, consequently, the output of the electric power generated from the pressurized liquid.
10. The system of claim 1, wherein the Pressure-to-Electricity Conversion System (7) is configured to operate independently of the pressurizing cycle, providing continuous power output even during recharging cycles of the pressurizing system (6).
11. The system of claim 1, wherein the entire configuration, including each component’s material, shape, size, and capacity, can be customized or changed at any point based on specific project needs or environmental conditions.
12. The system of claim 1, further comprising:
• Safety Mechanisms including chains, wires, or special materials to secure the collapsible pressure tube/shell (1) and prevent accidental discharge or pressure-related damage.
13. The system of claim 1, wherein the Pressurizing System (6) can be powered by any suitable energy source, including renewable sources like solar, wind, hydro, geothermal, or other conventional sources, making it adaptable to various power sources for sustainable operation.
14. The system of claim 1, further comprising:
• an optional Pressure Regulator configured to monitor and control pressurization, ensuring optimal performance of the liquid storage and discharge cycles.
15. The system of claim 1, wherein the Collapsible Pressure Tube/Shell (1) can store any fluid capable of powering turbines, including but not limited to water, oil, or other reusable fluids with sufficient pressure and flow characteristics for power generation.
16. The system of claim 1, wherein the entire storage setup, including the collapsible pressure tube/shell (1), sliding tower (2), platform (4), and charge tower unit (3), can be installed in various locations, including underground, to reduce land use and enhance environmental compatibility.
17. The system of claim 1, wherein the Charge Tower Unit (3) can use magnetic, spring, or other non-weight-based mechanisms to pressurize the collapsible pressure tube/shell (1), allowing for customizable pressurization methods to adapt to project-specific cost and efficiency needs.
18. The system of claim 1, further comprising:
• an Electric Power Module configured to supply electric power directly from the pressure-to-electricity conversion system to operate the pressurizing system or other auxiliary devices.
19. The system of claim 1, wherein the Collapsible Pressure Tube/Shell (1) is constructed from durable materials that ensure long-term use and adaptability for multiple charge-discharge cycles without degradation, providing an effective, sustainable energy storage solution.
20. The system of claim 1, wherein the pressurized liquid remains at a stable pressure indefinitely within the collapsible pressure tube/shell (1) unless there are external changes or leaks, ensuring consistent energy storage and retrieval efficiency over long periods.