Conjugate Mathematical Model of Heat and Mass Transfer in the Thermal Energy Storage Module with a “Solid Body–Liquid” Phase Transition

IF 1.204 Q3 Energy
L. Knysh, R. Yurkov
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引用次数: 0

Abstract

Computer modeling results of heat and mass transfer processes in a thermal energy storage module with a “solid body–liquid” phase transition are presented. A cylindrical element filled with heat storage material was studied. A channel with the moving heat transfer fluid is located inside the cylindrical element as a “double pipe.” A coupled non-stationary non-linear 3D mathematical model was developed, which consists of the energy equations for phase change materials and heat transfer fluid. Latent heat in phase change material was taken into account by the effective heat capacity method. Natural convection at melting is calculated together with forced convection of heat transfer fluid through introduction of the effective heat transfer coefficient. The finite volume method with splitting by physical processes and space coordinates is used during the creation of the numerical algorithm. A conducted numerical parametric study allowed us to determine the temperature distribution in the phase change material and heat transfer fluid, the moving interface velocity, full time of charging of the thermal energy storage module, and the influence this process had on the heat transfer fluid temperature and velocity. The results were verified through comparison of an analytical solution of a test problem and with experimental data. The presented method can be used during the design of the latent thermal energy storage module, which functions in wide temperature range, with different phase change materials types and different heat transfer fluids types.

Abstract Image

Abstract Image

具有 "固态-液态 "相变的热能存储模块中传热和传质的共轭数学模型
摘要 介绍了具有 "固态体-液态 "相变的热能储存模块中传热和传质过程的计算机建模结果。研究了一个充满储热材料的圆柱形元件。在圆柱形元件内部有一个装有移动传热流体的 "双管 "通道。建立了一个耦合的非稳态非线性三维数学模型,其中包括相变材料和导热流体的能量方程。相变材料中的潜热通过有效热容法计算在内。通过引入有效传热系数,计算了熔化时的自然对流和传热流体的强制对流。在创建数值算法时,使用了按物理过程和空间坐标分割的有限体积法。通过数值参数研究,我们确定了相变材料和导热流体中的温度分布、移动界面速度、热能储存模块的全充电时间,以及这一过程对导热流体温度和速度的影响。通过对比测试问题的分析解法和实验数据,对结果进行了验证。该方法可用于潜热储能模块的设计,该模块可在宽温度范围内使用不同类型的相变材料和不同类型的导热液体。
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来源期刊
Applied Solar Energy
Applied Solar Energy Energy-Renewable Energy, Sustainability and the Environment
CiteScore
2.50
自引率
0.00%
发文量
0
期刊介绍: Applied Solar Energy  is an international peer reviewed journal covers various topics of research and development studies on solar energy conversion and use: photovoltaics, thermophotovoltaics, water heaters, passive solar heating systems, drying of agricultural production, water desalination, solar radiation condensers, operation of Big Solar Oven, combined use of solar energy and traditional energy sources, new semiconductors for solar cells and thermophotovoltaic system photocells, engines for autonomous solar stations.
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