New advances in CAES have demonstrated the benefits of trigenerative concept (T-CAES), especially in off-grid sites. Many studies focused on thermodynamic optimization of design and operation parameters of the system. They underlined the importance of extending research objectives to techno-economic assessment of the system. The aim of this study is to investigate the T-CAES economical aspect, by coupling an economic model to the previous thermodynamic one developed by the authors. A techno-economic parametric optimization is addressed to find optimal solutions of design parameters. The plant cost and its economic benefit against electrochemical batteries are analyzed and discussed. The case studies are remote Canadian communities. The cost of air storage tanks accounts for the highest cost and the storage pressure plays the key roles. An optimal range of this latter has been demonstrated to be in the range of [120 bars–200 bars]. The plant cost/kW declines with the power scale, however at larger scales above 20 kW, the high cost of reservoirs turns out the main drawback to achieve greater economic benefits. T-CAES could be competitive with electrochemical batteries in terms of investment costs at long terms, especially when accounting for the free-cost of cooling and heating energy production.

CAES 的新进展已经证明了三联概念 (T-CAES) 的好处，尤其是在离网站点中。许多研究集中在系统设计和运行参数的热力学优化上。他们强调了将研究目标扩展到系统技术经济评估的重要性。本研究的目的是通过将经济模型与作者开发的先前热力学模型相结合来研究 T-CAES 的经济方面。解决了技术经济参数优化以找到设计参数的最佳解决方案。对电化学电池的工厂成本及其经济效益进行了分析和讨论。案例研究是偏远的加拿大社区。储气罐的成本占最高成本，存储压力起着关键作用。后者的最佳范围已被证明在 [120 条 - 200 条] 的范围内。电厂成本/kW随着功率规模的增加而下降，但在20kW以上的更大规模上，水库成本高成为实现更大经济效益的主要缺点。从长期来看，T-CAES 可以在投资成本方面与电化学电池竞争，尤其是在考虑到冷却和加热能源生产的免费成本时。