This paper proposed a new approach for the efficient air conditioning of large tropical buildings. The current study has two objectives: the design and numerical investigations of the performance of vertically oriented high capacity linear slot diffusers (HCLSD) in an atrium building and the verification and validation of the different turbulence models through laboratory-scale experiments. The HCLSD was investigated with varying angles of inclination of the blades (ϕ = 0^o to 25^o) for the in-depth performance analyses. The performance was evaluated by monitoring and comparing the velocity and temperature profiles along the vertical lines drawn at different locations in the studied domain. A relatively longer jet throw was noticed through quantitative analysis at ϕ = 0^o. Note that more than 33% increment in the face velocity was recorded at this angle. The corresponding terminal velocity of 0.225 m/s was observed at 8 m distance from the diffuser face. The detailed investigations at 0^o deflector angle (case-1) were carried out for velocity, temperature field, and thermal comfort indices, i.e. PMV and PPD models. For the occupied zone, the thermal comfort indices were found within the acceptable ranges (i.e. PMV = + 0.1 to +0.9 and PPD = 4% to 20%).

Abbreviations: ACMV: Air conditioning and mechanical ventilation; CFD: Computational fluid dynamics; CMH: Cubic meter per hour; DV: Displacement ventilation; HCLSD: High capacity linear slot diffuser; IAQ: Indoor air quality; MV: Mixing ventilation; PMV: Predicted mean vote; PPD: Predicted percentage dissatisfied; RANS: Reynolds-Averaged Navier – Stokes; RNG: Re-Normalization Group; SST: Shear-Stress Transport: SIMPLE: Semi-implicit method for pressure linked equations; VAV: Variable air volume; VSD: Variable speed drives

本文提出了一种用于大型热带建筑高效空调的新方法。目前的研究有两个目标：设计和数值研究中庭建筑中垂直定向的高容量线性缝隙扩散器 (HCLSD) 的性能，以及通过实验室规模的实验验证和验证不同的湍流模型。对 HCLSD 进行了研究，其中叶片的倾斜角度不同（φ = 0 ^o至 25 ^o），以进行深入的性能分析。通过监测和比较沿研究区域不同位置绘制的垂直线的速度和温度剖面来评估性能。在 φ = 0 ^{o时通过定量分析注意到相对较长的射流射程}. 请注意，在此角度记录的面速度增量超过 33%。在距扩散器面 8 m 处观察到相应的终端速度为 0.225 m/s。对速度、温度场和热舒适指数（即 PMV 和 PPD 模型）进行了 0 度偏转角（案例 1）^的详细调查。对于居住区，热舒适指数在可接受的范围内（即 PMV = + 0.1 至 +0.9 和 PPD = 4% 至 20%）。

缩略语： ACMV：空调和机械通风；CFD：计算流体动力学；CMH：立方米每小时；DV：置换通风；HCLSD：高容量线性槽扩散器；IAQ：室内空气质量；MV：混合通风；PMV：预测平均投票；PPD：预测的不满意百分比；RANS：雷诺平均纳维 - 斯托克斯；RNG：重新归一化组；SST：剪切应力传递：SIMPLE：压力关联方程的半隐式方法；VAV：变风量；VSD：变速驱动器