Dehumidifying System for Compressed Air Energy Storage
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Solution Overview
Problem
CAES systems face issues with moisture condensation during the cooling phase, leading to potential damage of components due to residual moisture in the compressed air stream, which can cause corrosion and degradation of equipment.
Innovation Solution
Incorporating a dehumidifying system within the CAES system that utilizes desiccant-type, glycol-based, or condensation-type components to remove moisture from the compressed air prior to storage in the compressed air storage volume, thereby minimizing moisture-induced corrosion and degradation of downstream components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If compressed air is cooled during the compression phase to接近 cavern temperature, then energy efficiency is improved and compression heat is reduced, but moisture condenses out of the compressed air stream causing potential damage to components
Solution Approach 1:
The patent divides the compression and cooling process into separate stages. Compression occurs first to achieve required pressure, then cooling is applied in a controlled manner. This segmentation allows the system to achieve both energy efficiency and moisture control by decoupling the compression function from the cooling function, preventing excessive condensation during the compression phase.
Solution Approach 2:
The patent implements preliminary cooling of compressed air before it enters the storage cavern. By cooling the air in advance through heat exchangers or cooling towers, the system reduces the temperature and moisture content of the air prior to storage. This preliminary action prevents moisture condensation and potential damage to cavern components while maintaining energy efficiency.
2Quantity of substance
If compressed air is stored in a cavern after compression, then energy storage capacity is improved, but residual moisture in the compressed air stream causes corrosion and degradation of cavern components
Solution Approach 1:
The patent applies preliminary drying and cooling treatments to the compressed air before it is injected into the storage cavern.通过使用冷却塔和热交换器，系统在空气进入 cavern 之前降低其温度和湿度，从而预防了后续可能发生的腐蚀和部件退化，同时保持了充足的能量储存容量。
Solution Approach 2:
The patent introduces intermediary cooling and drying systems (heat exchangers, cooling towers) between the compression stage and the storage cavern. These intermediary devices act as mediators that remove residual moisture from the compressed air stream without affecting the energy content, thereby protecting cavern components while maintaining storage capacity.
3Reliability
If a dehumidifying system is added to remove moisture from compressed air, then component protection is improved, but system complexity increases
Solution Approach 1:
The patent employs passive cooling methods such as cooling towers and ambient heat exchangers that utilize natural convection and environmental temperatures to remove moisture from compressed air. These self-service systems require minimal active control and maintenance compared to active dehumidification equipment, thereby protecting components while adding relatively little system complexity.
Solution Approach 2:
The patent uses pneumatic and hydraulic cooling systems (water-cooled heat exchangers, cooling towers) to remove moisture from compressed air. These systems leverage fluid dynamics and heat transfer principles to achieve dehumidification through straightforward engineering solutions rather than complex mechanical dehumidification equipment, balancing component protection with system simplicity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The dehumidifying system effectively removes moisture from the compressed air, protecting the integrity of the cavern and reducing wear on components, thus enhancing the operational reliability and longevity of the CAES system.
Implementation Method 1
moisture often condenses out of the compressed air stream
Data Source
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AI summary
A method, system, and apparatus including a compressed air energy storage system that includes an ambient air intake configured to intake a quantity of ambient air for storage in a compressed air storage volume, a compression system having a compression path that is configured to convey air compressed by the compression system through the compression system, a first path configured to convey ambient air to the compression system, a second path proceeding from the compression system to the compressed air storage volume and configured Io convey compressed air to the compressed air storage volume, and a dehumidifying system. The dehumidifying system is co?pleable to at least one of the first path that proceeds from the ambient air intake to the compression system, the compression path, and the second path. The dehumidifying system includes a dehumidifying component configured to remove moisture from the ambient air and/or the compressed air.