在过去几年中，斯堪的纳维亚国家的办公楼引入了一种新的置换式空气分配系统，该系统将低速空气直接供应给被占区域，并沿楼板至天花板方向置换气流。本研究的目的是评估置换式空气分配系统，并将其性能与美国办公楼中传统的可变和恒定气流系统的性能进行比较。使用DOE-2.1C建筑模拟程序，针对四种具有代表性的美国气候（明尼阿波利斯、西雅图、亚特兰大和埃尔帕索），计算了典型美国大型办公楼的荷载。每小时负荷和每小时天气数据被用作模拟系统性能的新计算机程序的输入。计算了每种气候下三个建筑区（南部、北部和核心区）的能耗、空气质量、热满意度和系统成本。利用最近的实验室测量结果对位移系统进行了模拟。 结果表明，置换系统通常比传统的空气再循环系统具有更好的空气质量和热舒适性。采用热回收或可变风量（VAV）流量控制的置换系统所消耗的能量与采用再循环操作的传统空气分配系统的能耗相似。然而，当最大冷却负荷超过13 Btu/ho ft2（40 W/m2）且需要冷却板时，置换系统的第一成本远远高于传统系统的第一成本。传统变风量空调系统能耗低。然而，如果最小送风量和进入空气处理器的最小室外空气入口的组合不能为建筑的每个区域带来足够的室外空气，则室内空气质量可能会显著恶化。引用:研讨会，ASHRAE Trans。，第95卷，第。2.

During the last few years, a new displacement air distribution system with low-velocity air supplied directly to the occupied zone and a displacement flow in the floorto- ceiling direction has been introduced into office buildings in Scandinavian countries. The purpose of this study was to evaluate displacement air distribution systems and compare their performance to the performance of traditional variable- and constant-airflow systems in U.S. office buildings. The loads of a typical large U.S. office building were calculated for four representative U.S. climates (Minneapolis, Seattle, Atlanta, and El Paso) with the DOE-2.1C building simulation program. Hourly loads and hourly weather data were used as inputs for new computer programs that simulated system performance. Energy consumption, air quality, thermal satisfaction, and the cost of the systems were calculated for three building zones (south, north, and core) in each climate. The displacement systems were simulated using results from recent laboratory measurements. The results indicate that displacement systems generally yield superior air quality and thermal comfort compared to conventional systems with air recirculation. The energy consumed by displacement systems with heat recovery or variable-air-volume (VAV) flow control was similar to the energy consumption of conventional air distribution systems operated with recirculation. However, the first cost of displacement systems is substantially higher than the first cost of conventional systems when the maximum cooling load exceeds 13 Btu/ho ft2(40 W/m2) and cooling panels are required. The energy consumption of the traditional VAV systems was low. However, indoor air quality can deteriorate significantly if the combination of minimum supply airflow and minimum outdoor air entry into the air handler do not bring an adequate amount of outdoor air to each region of the building.