Abstract

Most of the building energy is mainly contributing to the achievement of thermal comfort. The cooling load on air conditioners will increase with increased heat transfer into the building from the surroundings. The amount of heat transfer into the building mainly depends on building materials used in construction. In this research, an attempt has been made to analyse the self-sufficient homes’ concept by visualizing variation in heat transfer of the building concerning ordinary clay brick and brick with sinicon composition. The temperature distribution of airflow, time lag, decrement factor, and comfort conditions are investigated concerning these materials with computational fluid dynamics. Numerical modeling has been defined by selecting three-dimensional fluid flow governing equations and the k–ε turbulence model. All the fluid flow governing equations have been solved with the finite-volume second-order upwind discretization and SIMPLE algorithm for pressure–velocity coupling. Numerical results have been analysed for both the materials and we identified that the sinicon brick material for the considered wall thickness (9 inches) had registered an increased time lag (∼2 hrs) and a decreased decrement factor (0.05). This research investigation shows that the sinicon-brick wall strongly decreases heat transfer through it compared to the normal-red brick wall. The sinicon brick significantly reduces the air conditioner’s cooling load by decreasing heat energy penetration into the building.

中文翻译：

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普通黏土砖和正丁砖的住宅建筑热能相互作用的计算研究

摘要

大部分建筑能耗主要用于实现热舒适性。随着从周围环境到建筑物的热量传递的增加，空调的制冷负荷将增加。传给建筑物的热量主要取决于建筑中使用的建筑材料。在这项研究中，尝试通过可视化建筑物的传热变化来分析自给自足房屋的概念，这些变化涉及普通粘土砖和具有sinicon组成的砖。通过计算流体动力学研究了这些材料的气流温度分布，时滞，递减系数和舒适条件。通过选择三维流体流动控制方程式和k来定义数值模型–ε湍流模型。所有的流体流动控制方程都已经通过有限体积的二阶迎风离散化和压力-速度耦合的SIMPLE算法求解了。对这两种材料的数值结果均进行了分析，我们确定了在考虑壁厚（9英寸）的情况下，sinicon砖材料的时滞增加了（〜2小时），而递减系数减小了（0.05）。这项研究表明，与普通红砖墙相比，正弦砖砖墙极大地降低了通过它的传热。sinicon砖通过减少热能渗透到建筑物中来显着降低空调的冷却负荷。