This paper primarily focuses on a systematic top-down approach in the structural and feasibility analysis of the novel modular system which integrates a 5 kW wind turbine with compressed air storage built within the tower structure, thus replacing the underground cavern storing process. The design aspects of the proposed modular compressed air storage system (CAES) were executed to eliminate the multistage air compression process and overcome the adverse safety issues of underground caverns prevailing in the conventional system. Moreover, the waste heat treatment can be eliminated owing to its low-pressure operation (8 bar max) which reduces the complexity of the system. A detailed structural analysis was conducted for the foundation, tower structure, storage chamber and wind blades using the Structural Analysis and Designing Program (STAADPRO) and Analysis System (ANSYS) software for a basic wind speed of 180 km/hour (50 m/sec) as per the IS 875 (Part 3): 2015. Certainly, the results proved that the system remained stable at its natural and sub-harmonic frequencies. However, to ensure the feasible operation of the concept, a prototype model was tested for wind speeds starting from 3 m/s and was found to compress up to a maximum of 8 bar pressure.

Graphic abstract

中文翻译：

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5kw风机模块化压缩空气储能系统可行性研究

本文主要侧重于对新型模块化系统进行结构和可行性分析的系统自顶向下方法，该系统将 5 kW 风力涡轮机与内置于塔架结构内的压缩空气存储集成在一起，从而取代了地下洞穴存储过程。所提出的模块化压缩空气存储系统 (CAES) 的设计方面旨在消除多级空气压缩过程并克服传统系统中普遍存在的地下洞穴的不利安全问题。此外，由于其低压操作（最大 8 bar），可以消除废热处理，从而降低了系统的复杂性。对地基、塔式结构、根据 IS 875（第 3 部分）：2015，使用结构分析和设计程序 (STAADPRO) 和分析系统 (ANSYS) 软件对存储室和风力叶片进行分析，基本风速为 180 公里/小时（50 米/秒）。当然，结果证明系统在其固有频率和次谐波频率下保持稳定。然而，为了确保该概念的可行操作，原型模型在风速从 3 m/s 开始的情况下进行了测试，发现可以压缩到最大 8 bar 的压力。

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