Development on Thermochemical Energy Storage Based on CaO-Based Materials: A Review

Yuan, Yazhou; Li, Yingjie; Zhao, Jianli

doi:10.3390/su10082660

Cited by 41 publications

(17 citation statements)

References 133 publications

(220 reference statements)

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“…Ca(OH) 2 /CaO is among more used systems in chemical processes [253][254][255][256]. This system has numerous advantages, e.g., efficient reaction kinetics [257] and high reaction enthalpy (104.4 KJ/mol) [258]. It is a very suitable material in thermal storage systems [259], in particular for high-temperatures (400-600 • C) applications [260].…”

Section: Thermochemical Processes and Materialsmentioning

confidence: 99%

A Review of Thermochemical Energy Storage Systems for Power Grid Support

et al. 2020

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Power systems in the future are expected to be characterized by an increasing penetration of renewable energy sources systems. To achieve the ambitious goals of the “clean energy transition”, energy storage is a key factor, needed in power system design and operation as well as power-to-heat, allowing more flexibility linking the power networks and the heating/cooling demands. Thermochemical systems coupled to power-to-heat are receiving an increasing attention due to their better performance in comparison with sensible and latent heat storage technologies, in particular, in terms of storage time dynamics and energy density. In this work, a comprehensive review of the state of art of theoretical, experimental and numerical studies available in literature on thermochemical thermal energy storage systems and their use in power-to-heat applications is presented with a focus on applications with renewable energy sources. The paper shows that a series of advantages such as additional flexibility, load management, power quality, continuous power supply and a better use of variable renewable energy sources could be crucial elements to increase the commercial profitability of these storage systems. Moreover, specific challenges, i.e., life span and stability of storage material and high cost of power-to-heat/thermochemical systems must be taken in consideration to increase the technology readiness level of this emerging concept of energy systems integration.

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Section: Thermochemical Processes and Materialsmentioning

confidence: 99%

A Review of Thermochemical Energy Storage Systems for Power Grid Support

et al. 2020

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“…Ca(OH) 2 /CaO has been demonstrated to date to be the most interesting studied thermochemical energy storage system based on metal hydroxides and has prompted tests in lab-scale reactors and thermogravimetry analysis (TGA) (Equation (1), Figure 3) [3,7,[9][10][11][12][13]. However, the enhancement of material stability is required to reduce the sintering effect.…”

Section: Tces Systems Based On Hydroxidesmentioning

confidence: 99%

“…Several of them have demonstrated attractive performances for TCES application, such as CaO/CaCO 3 , SrO/SrCO 3 or BaO/BaCO 3 [33]. Calcium-Looping (CaL) technology in particular, coupled with CSP, is being thoroughly studied for adaptation to TCES power plant (Equation ( 2)) [3,12,[34][35][36][37][38]. This reversible cycle requires operating temperatures between 850 and 950 • C.…”

Section: Tces Systems Based On Carbonatesmentioning

confidence: 99%

Recent Advances in Thermochemical Energy Storage via Solid–Gas Reversible Reactions at High Temperature

André

Abanades

2020

Energies

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The exploitation of solar energy, an unlimited and renewable energy resource, is of prime interest to support the replacement of fossil fuels by renewable energy alternatives. Solar energy can be used via concentrated solar power (CSP) combined with thermochemical energy storage (TCES) for the conversion and storage of concentrated solar energy via reversible solid–gas reactions, thus enabling round the clock operation and continuous production. Research is on-going on efficient and economically attractive TCES systems at high temperatures with long-term durability and performance stability. Indeed, the cycling stability with reduced or no loss in capacity over many cycles of heat charge and discharge of the material is pursued. The main thermochemical systems currently investigated are encompassing metal oxide redox pairs (MOx/MOx−1), non-stoichiometric perovskites (ABO3/ABO3−δ), alkaline earth metal carbonates and hydroxides (MCO3/MO, M(OH)2/MO with M = Ca, Sr, Ba). The metal oxides/perovskites can operate in open loop with air as the heat transfer fluid, while carbonates and hydroxides generally require closed loop operation with storage of the fluid (H2O or CO2). Alternative sources of natural components are also attracting interest, such as abundant and low-cost ore minerals or recycling waste. For example, limestone and dolomite are being studied to provide for one of the most promising systems, CaCO3/CaO. Systems based on hydroxides are also progressing, although most of the recent works focused on Ca(OH)2/CaO. Mixed metal oxides and perovskites are also largely developed and attractive materials, thanks to the possible tuning of both their operating temperature and energy storage capacity. The shape of the material and its stabilization are critical to adapt the material for their integration in reactors, such as packed bed and fluidized bed reactors, and assure a smooth transition for commercial use and development. The recent advances in TCES systems since 2016 are reviewed, and their integration in solar processes for continuous operation is particularly emphasized.

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“…Thermochemical Energy Storage (TCES) stores and releases energy in the form of heat as chemical potential of a storage material through a reversible endothermic/exothermic chemical reaction. TCES is favourable compared to sensible and latent heat storage [3][4][5] because it features a high energy density, low heat losses and the possibility to discharge the system at a relatively high and constant output temperature [6].…”

Section: Thermochemical Energy Storagementioning

confidence: 99%

“…Numerous studies have been conducted on thermochemical energy storage in different materials, including calcium oxide [3,6], manganese oxide [7,8], barium oxide [9], zinc oxide [10], cobalt oxide/iron oxide [11], strontium bromide [12], calcium carbonate [13] and many more.…”

Section: Thermochemical Energy Storagementioning

confidence: 99%

Improving Thermochemical Energy Storage Dynamics Forecast with Physics-Inspired Neural Network Architecture

et al. 2020

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Thermochemical Energy Storage (TCES), specifically the calcium oxide (CaO)/calcium hydroxide (Ca(OH)2) system is a promising energy storage technology with relatively high energy density and low cost. However, the existing models available to predict the system’s internal states are computationally expensive. An accurate and real-time capable model is therefore still required to improve its operational control. In this work, we implement a Physics-Informed Neural Network (PINN) to predict the dynamics of the TCES internal state. Our proposed framework addresses three physical aspects to build the PINN: (1) we choose a Nonlinear Autoregressive Network with Exogeneous Inputs (NARX) with deeper recurrence to address the nonlinear latency; (2) we train the network in closed-loop to capture the long-term dynamics; and (3) we incorporate physical regularisation during its training, calculated based on discretized mole and energy balance equations. To train the network, we perform numerical simulations on an ensemble of system parameters to obtain synthetic data. Even though the suggested approach provides results with the error of 3.96×10−4 which is in the same range as the result without physical regularisation, it is superior compared to conventional Artificial Neural Network (ANN) strategies because it ensures physical plausibility of the predictions, even in a highly dynamic and nonlinear problem. Consequently, the suggested PINN can be further developed for more complicated analysis of the TCES system.

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Development on Thermochemical Energy Storage Based on CaO-Based Materials: A Review

Cited by 41 publications

References 133 publications

A Review of Thermochemical Energy Storage Systems for Power Grid Support

A Review of Thermochemical Energy Storage Systems for Power Grid Support

Recent Advances in Thermochemical Energy Storage via Solid–Gas Reversible Reactions at High Temperature

Improving Thermochemical Energy Storage Dynamics Forecast with Physics-Inspired Neural Network Architecture

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