کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1732626 1521486 2013 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Non-equilibrium thermochemical heat storage in porous media: Part 1 – Conceptual model
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
پیش نمایش صفحه اول مقاله
Non-equilibrium thermochemical heat storage in porous media: Part 1 – Conceptual model
چکیده انگلیسی


• Rigorous application of the Theory of Porous Media and the 2nd law of thermodynamics.
• Thermodynamically consistent model for thermochemical heat storage systems.
• Multicomponent gas; modified Fick's and Darcy's law; thermal non-equilibrium; solid–gas reactions.
• Clear distinction between source and production terms.
• Open source finite element implementation and benchmarks.

Thermochemical energy storage can play an important role in the establishment of a reliable renewable energy supply and can increase the efficiency of industrial processes. The application of directly permeated reactive beds leads to strongly coupled mass and heat transport processes that also determine reaction kinetics. To advance this technology beyond the laboratory stage requires a thorough theoretical understanding of the multiphysics phenomena and their quantification on a scale relevant to engineering analyses. Here, the theoretical derivation of a macroscopic model for multicomponent compressible gas flow through a porous solid is presented along with its finite element implementation where solid–gas reactions occur and both phases have individual temperature fields. The model is embedded in the Theory of Porous Media and the derivation is based on the evaluation of the Clausius–Duhem inequality. Special emphasis is placed on the interphase coupling via mass, momentum and energy interaction terms and their effects are partially illustrated using numerical examples. Novel features of the implementation of the described model are verified via comparisons to analytical solutions. The specification, validation and application of the full model to a calcium hydroxide/calcium oxide based thermochemical storage system are the subject of part 2 of this study.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy - Volume 60, 1 October 2013, Pages 254–270
نویسندگان
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