冷却梁系统使用流经安装在天花板上的模块化梁的冷却水，在占用空间内提供合理的冷却。由于冷冻水的热能大于空气，因此此类系统比所有空气系统实现更高的能效，因此非常适合具有相对较大显冷负荷的空间。本文提出了一个基于数值的研究，重点是被动冷却梁（PCB）-置换通风（DV）组合系统的性能。利用计算流体力学（CFD）模拟，研究了典型办公房间中PCB显冷量及其对通风效率和乘员舒适性的影响。 结合PCB系统，对混合通风、置换通风两种通风系统进行了对比分析。为了研究不同系统的冷却效果与负荷变化之间的关系，在不同负荷条件下进行了仿真。研究结果表明，性能可能会随PCB冷却输出而显著变化，但不随热负荷的安排而变化。结果还表明，与组合式PCB-MV系统相比，组合式PCB-DV系统可以提供相对较好的室内空气质量和热舒适性。对空气年龄（空气新鲜度）空间分布的模拟表明，组合式PCB-DV系统可以在较低能耗的情况下实现较高的通风效率。 引文:2017年冬季会议，内华达州拉斯维加斯，会议论文

Chilled beam systems provide sensible cooling in the occupied space using chilled water flowing through modular beams mounted to a ceiling. Such systems achieve greater energy efficiency than all-air system due to larger thermal energy of the chilled water than air, and thus are well-suited for spaces with relatively large sensible cooling load. This paper presents a numerically based study focusing on the performance of combined passive chilled beam (PCB)-displacement ventilation (DV) systems. Using computational fluid dynamics (CFD) simulation, the amount of sensible cooling by PCB and its impacts on ventilation effectiveness and occupant comfort in a typical office room are investigated. Along with the PCB system, two ventilation systems are compared and analyzed: mixing ventilation (MV), displacement ventilation. Simulations under different load conditions are conducted to study the relationship between cooling effect of different systems and load variation. The study results reveal that the performance can vary significantly with PCB cooling output, but not with the arrangements of heat loads. The results also show that the combined PCB-DV systems can provide relatively good indoor air quality and thermal comfort compared to the combined PCB-MV system. Simulations of spatial distribution of age-of-air (air freshness) suggest that combined PCB-DV systems can achieve high ventilation effectiveness with lower energy consumption.