A novel mathematical model for the performance assessment of diabatic compressed air energy storage systems including the turbomachinery characteristic curves

Abstract

In this work, a novel detailed mathematical model for the performance assessment of diabatic compressed air energy storage (D-CAES) systems with underground storage site is proposed. The model was implemented in Matlab environment and it was validated using the D-CAES Huntorf plant data, demonstrating a close agreement with the data reported in literature. The analysis of some case studies of the D-CAES plant showed that the characteristic curves of the compressors, that were assumed for the operation in steady state conditions, are not suitable for modeling the operation in time-dependent conditions. Thus, different characteristic curves of the compressors and turbines were identified in such a way that the operation points of turbomachinery lay within the admissible range during the entire process sequence, in steady state or time-dependent conditions. Furthermore, the analysis demonstrated that the presence of the throttling valves in the charging and discharging circuits is preferable due to a higher simplicity of construction and regulation despite a low increase of the fuel consumption in the combustion chambers

Process design, operation and economic evaluation of compressed air energy storage (CAES) for wind power through modelling and simulation

“…Different components of the CAES system and corresponding blocks in Aspen Plus ® were summarised in Table 2. The data of the reference CAES system used for model validation was from Briola et al [33]. The flowsheet of the CAES plant is shown in Figure 7 .…”

“…The operation, control and management strategies of CAES system integrated with wind power have been proposed using a mathematical model [28][29][30][31][32]. Briola et al [33] developed a quasi-stationary mathematical model of a CAES system and investigated the characteristic curves of the compressors and turbines for the purpose of performance analysis.…”

An accurate bilinear cavern model for compressed air energy storage

“…Some research has been conducted to model compressors and turbines [24], [25], [26]. However, the CAES cavern models available in the literature [11], [27], [28], [29], [30] are either too complicated or inaccurate and, as such, are not suitable for real applications.…”

Hybrid Hydrogen and Mechanical Distributed Energy Storage

“…In diabatic CAES, the heat generated during the compression is dissipated, mainly to increase thermodynamic efficiency and to minimize the required storage volume, while reducing technical problems related to high temperature compression and storage [35]. The thermal energy necessary to avoid freezing in the expander is provided by fossil fuel combustion.…”

“…Thus, no fossil fuel combustion is required. Several studies and techno-economic assessments on adiabatic CAES are available in the literature, in combination with renewable energy systems or connected to the power grid [29][30][31][32][33][34][35][36][37][38][39][40][41][42][43]. They promise efficiencies up to 65-70%, but no plants of this type exist so far, mainly for the high investment costs, the complexity of the system, and the technological barriers to moderately high temperature heat storage.…”