本文总结了一项将置换通风与任务调节相结合的通风概念的实验和数值研究，即所谓的桌面置换通风（DDV）概念。该研究使用稳态和瞬态结果来讨论DDV概念对标准办公室配置的适用性。对该概念的评估侧重于微观/宏观气候和热舒适性。结果表明，作为任务调节的一个特征，微观气候和宏观气候之间的分离不太明显。 此外，办公桌的热舒适条件限制了DDV系统的制冷能力。最后，该概念的瞬态特性不符合任务调节系统的规定要求。因此，主要结论是，坐在置换通风装置附近没有特别的优势。建议对DDV系统进行改进，采用一个平行系统，在头部附近提供新鲜空气。利用计算流体力学对组合系统的改进进行了研究。 单元:双引文:研讨会，ASHRAE交易，第105卷，第。1999年2月2日，西雅图

This paper summarizes an experimental and numerical study into a ventilation concept that combines displacement ventilation with task conditioning, the so-called desk displacement ventilation (DDV) concept. The study uses steady-state and transient results to discuss the applicability of the DDV concept for standard office room configurations. The evaluation of the concept focuses on the micro/macroclimate and thermal comfort. Results show that the separation between micro- and macroclimate, a characteristic of task conditioning, is less pronounced. Furthermore, the thermal comfort conditions at the desk limit the cooling capacity of a DDV system. Finally, the transient characteristics of the concept do not conform to stated requirements for task conditioning systems. The main conclusion, therefore, is that there is no particular advantage in sitting close to a displacement ventilation unit. An improvement of the DDV system is proposed by incorporating a parallel system that provides the fresh air near head level. The improvement of the combined system has been investigated using computational fluid dynamics.Units: Dual