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首页> 外文会议>International symposium on heating, ventilation and air conditioning >Numerical Study of the Return Air Characteristics in the Stratified Air-Conditioning System with Middle Sidewall Air Return Intakes
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Numerical Study of the Return Air Characteristics in the Stratified Air-Conditioning System with Middle Sidewall Air Return Intakes

机译：中侧壁空气回物入口分层空调系统返回空气特性的数值研究

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For energy efficiency and better IAQ, stratified air distribution (STRAD) systems with low sidewall air supply (LSAS) and middle sidewall air return (MSAR) are even more used nowadays in large-space buildings. Located between the air-conditioning zone (ACZ) and non-air-conditioning zone (NACZ), the air return opening will intake air flow from both sides. In order to study the air flow characteristics near the air return opening computational fluid dynamic (CFD) is used. CFD physical model is built in accordance with the dimension of the reduced-scale model. A steady-state simulation is conducted first for the calculation of the steady temperature and velocity field, and then, the air in ACZ and NACZ is marked separately with the 'Same Property and Different Name' method which is although the gas in both zones has different names, they share the same physical property with the normal air. After that, transient simulation with species transport equations continues to simulate and log the fraction of species in the air return flow. By evaluating the fraction of the species within return air flow, the proportion of return air from NACZ and ACZ can be calculated. By further processing the temperature and cooling capacity of each zone can also be demonstrated. These above mentioned can provide reference to the calculation of the total heat transferred from the NACZ to the ACZ which is critical to the cooling load of a large-space building.
机译：对于能源效率和更好的室内空气质量，分层的空气分布（STRAD）系统具有低侧壁供气（LSA）的中间和侧壁回风（澳门特别行政区）甚至更多的大空间建筑采用了时下。位于空气调节区（ACZ）和非空调区（NACZ）之间，从两侧的空气返回开口意愿进气流。为了研究所述空气返回开口计算流体动力学附近的空气流动特性（CFD）被使用。 CFD物理模型内置于根据缩尺模型的尺寸。稳态仿真首先进行用于稳定温度和速度场的计算，然后，在ACZ和NACZ空气与这是虽然在两个区域的气体具有“相同的属性和不同的名称”的方法单独标记不同的名称，它们与正常的空气相同的物理性质。在此之后，随着种输运方程瞬态仿真继续模拟和记录空气回流物种的分数。通过评估返回空气流内的物种的分数，返回空气从NACZ和ACZ比例可以计算出来。通过进一步处理的各区域的温度和冷却能力，也可以证明。这些上面提到可以提供参考从NACZ转移到这是一个大空间建筑物的制冷负荷的临界ACZ的总热量的计算。

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