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Applied energy v.212, 2018년, pp.1165 - 1177   SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Characterization of microencapsulated and impregnated porous host materials based on calcium chloride for thermochemical energy storage

Gaeini, M. (Eindhoven University of Technology, Department of Mechanical Engineering, P.O.Box 513, 5600MB Eindhoven, The Netherlands ) ; Rouws, A.L. (Eindhoven University of Technology, Department of Mechanical Engineering, P.O.Box 513, 5600MB Eindhoven, The Netherlands ) ; Salari, J.W.O. (TNO, Netherlands Institute for Applied Scientific Research, P.O. Box 6235, 5612 AP Eindhoven, The Netherlands ) ; Zondag, H.A. (Eindhoven University of Technology, Department of Mechanical Engineering, P.O.Box 513, 5600MB Eindhoven, The Netherlands ) ; Rindt, C.C.M. (Eindhoven University of Technology, Department of Mechanical Engineering, P.O.Box 513, 5600MB Eindhoven, The Netherlands ) ;
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    Abstract Thermochemical heat storage in salt hydrates is a promising method to improve the solar fraction in the built environment. The major concern at this stage is liquefaction followed by washing out of active material and agglomeration into large chunks of salt, thus deteriorating the diffusive properties of the porous salt hydrate structure. In this work, specific attention is given to the methods to stabilize a sample salt hydrate. Attempts have been made to stabilize calcium chloride by impregnation in expanded natural graphite and vermiculite, and by microencapsulation with ethyl cellulose. The effect of these stabilization methods on the performance of the material, such as kinetics and energy density, is investigated. Characterization of the materials is carried out with combined Thermo-Gravitational Analysis (TGA) and Differential Scanning Calorimetry (DSC) methods and microscopic observation, in order to evaluate the improvements on the basis of three subjects: reaction kinetics, heat storage density and stability. Within the boundary conditions for thermochemical energy storage as presented in this work, microencapsulated calcium chloride showed high multicyclic stability, compared with pure and impregnated materials, that liquefy upon hydration under the given conditions. Microencapsulated material remains stable over multiple cycles and at the same time shows the faster kinetics, but has a lower volumetric energy storage density. Highlights Attempts have been made to stabilize calcium chloride-based materials. Impregnation and microencapsulation methods are applied. Stability, kinetics and energy density are investigated. Combined TGA-DSC methods and microscopic observation are employed. Microencapsulation improved stability and kinetics but not energy density.


  • 주제어

    Thermochemical heat storage .   Calcium chloride composites .   Microencapsulation and impregnated .   Stability .   Kinetics and energy storage density .   TGA-DSC.  

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