Parameters to take into account when developing a new thermochemical energy storage system

Solé, Aran; Fontanet, Xavier; Barreneche, Camila; Martorell, Ingrid; Fernández, A. Inés; Cabeza, Luisa F.

doi:10.1016/j.egypro.2012.11.045

Cited by 21 publications

(5 citation statements)

References 23 publications

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“…For the proper design of the reactor, in which the solid-state reaction should take place, the knowledge of the reaction kinetics for the applied system is crucial. 18 Additionally, faster reaction kinetics mean that the process has a shorter response time. The kinetics of the system CuO/Cu 2 O has been investigated as a possible oxygen carrier for chemical looping combustion (CLC).…”

Section: ■ Introductionmentioning

confidence: 99%

High-Temperature Energy Storage: Kinetic Investigations of the CuO/Cu₂O Reaction Cycle

Deutsch¹,

Horvath²,

Knöll³

et al. 2017

Energy Fuels

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Thermochemical energy storage (TCES) is considered a possibility to enhance the energy utilization efficiency of various processes. One promising field is the application of thermochemical redox systems in combination with concentrated solar power (CSP). There, reactions of metal oxides are in the focus of research, because they allow for an increase in the process temperature. The reaction system CuO/Cu2O has been reported as a suitable candidate for TCES. For proper development and modeling of combined CSP–TCES processes, reliable kinetic data are necessary. This work studies the reduction of CuO and the oxidation of Cu2O under isothermal and isokinetic conditions. The reactions are analyzed using a simultaneous thermal analysis (STA) and a lab-scale fixed-bed reactor. The reaction behavior shows significant differences between both analyses. To develop kinetic models, the non-parametric kinetic (NPK) approach is used. This model-free approach is expanded by the Arrhenius correlation to increase the applicable temperature range of the models. The resulting models are evaluated and compared. Furthermore, the cycle stability of the system over 20 cycles is assessed for a small sample mass in the STA and a large sample mass in the fixed-bed reactor.

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Section: ■ Introductionmentioning

confidence: 99%

High-Temperature Energy Storage: Kinetic Investigations of the CuO/Cu₂O Reaction Cycle

Deutsch¹,

Horvath²,

Knöll³

et al. 2017

Energy Fuels

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“…Heat has to be transferred from solar collector to heat storage system to cookers and then back to collector. This fluid should have the [27,[66][67][68][69][70] following properties:…”

Section: Heat Transfer Fluidmentioning

confidence: 99%

Comparative study of heat storage and transfer system for solar cooking

Gawande

Ingole

2019

SN Appl. Sci.

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To run the Solar energy appliances, the continuous availability of solar energy is an essential. The Solar appliances are run by using solar energy either from PV cell or solar collector. Both of these devices require continuous solar rays. In order to use the solar energy after sunshine, it requires being stored first and then can be transferred to the appliances. One of the focused applications by using solar energy is the solar cooking. A Lot of research is going on the use of solar energy for cooking. But still, some extensive technique needs develop for easily usable systems. The various solar cookers are discussed to insist the need for development of solar storage systems for efficient cooking. This paper presents the comparative study of heat storage and transfer systems for solar cooking. The key aspects like, methodology to develop the heat storage system, requirements and properties of heat storage materials, need of insulations and their types are addressed. Some most usable materials are also analyzed. Keywords Heat storage system • PCM • Solar cooking List of symbols PCM Phase change material HTF Heat transfer fluid x Fraction melted Cp Specific heat (kJ/kg K) Csp Average specific heat between T1 and Tm (kJ/ kg K) Clp Average specific heat between Tm and T 2 (kJ/ kg K) dt Change in temperature in °C m Mass of heat storage medium (kg) Q Quantity of heat stored (kJ) T 2 Final temperature (°C) T 1 Initial temperature (°C) Tm Melting temperature (°C) hm Heat of fusion per unit mass (kJ/kg) VSI Vacuum super insulation VIM Vacuum insulation material VIP Vacuum insulation panel NIM Nano insulation material

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“…Comprehensive reviews of the heat storage technology and the materials used are presented in [1][2][3]. However, according to Sole et al [4], the main issue limiting the adoption of this technology was found to be the behavior of the working substances within the thermochemical reactor. Therefore, characterization of the working substances and the reactions occurring in thermochemical reactors will play a significant role in developing efficient heat storage systems.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of the Thermal Effect of the Dissolution Reaction for Some Alkalis and Salts with Natural Mixing and Forced Stirring

et al. 2019

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The paper presents the results of an experimental study of the exothermal and endothermal effects occurring on the dissolution of potassium nitrate KNO3, ammonium nitrate NH4NO3, potassium hydroxide KOH and sodium hydroxide NaOH, in distilled water with natural mixing and forced stirring. It is shown that for natural mixing, NH4NO3 and KOH are the most appropriate working substances for cooling and heat generation respectively, while for forced stirring, NH4NO3 and NaOH display better performance. The optimal concentrations of the liquid solutions for achieving extreme temperatures and maximal enthalpy changes are also defined. In addition, the regression function and regression coefficients describing correlations between the total enthalpy change of the calorimetric system and the solution concentration are found, for the most suitable liquid solutions. The experimental results obtained can be used to develop generating reactors for exothermal heating and endothermal cooling for a thermochemical seasonal storage system able to store solar heat or heat from combined heat and power (CHP) units of biogas plants in summer, for heating purposes in winter, while generating cooling to support air conditioning systems in summer.

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Parameters to take into account when developing a new thermochemical energy storage system

Cited by 21 publications

References 23 publications

High-Temperature Energy Storage: Kinetic Investigations of the CuO/Cu₂O Reaction Cycle

High-Temperature Energy Storage: Kinetic Investigations of the CuO/Cu₂O Reaction Cycle

Comparative study of heat storage and transfer system for solar cooking

Experimental Study of the Thermal Effect of the Dissolution Reaction for Some Alkalis and Salts with Natural Mixing and Forced Stirring

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Parameters to take into account when developing a new thermochemical energy storage system

Cited by 21 publications

References 23 publications

High-Temperature Energy Storage: Kinetic Investigations of the CuO/Cu2O Reaction Cycle

High-Temperature Energy Storage: Kinetic Investigations of the CuO/Cu2O Reaction Cycle

Comparative study of heat storage and transfer system for solar cooking

Experimental Study of the Thermal Effect of the Dissolution Reaction for Some Alkalis and Salts with Natural Mixing and Forced Stirring

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Product

Resources

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High-Temperature Energy Storage: Kinetic Investigations of the CuO/Cu₂O Reaction Cycle

High-Temperature Energy Storage: Kinetic Investigations of the CuO/Cu₂O Reaction Cycle