A temperature-based method is usually applied in displacement ventilation (DV) design when overheating is the primary indoor climate concern. Different steady-state models have been developed and implemented to calculate airflow rate in rooms with DV. However, in practical applications, the performance of DV depends on potentially dynamic parameters, such as strength, type and location of heat gains and changing heat gain schedule. In addition, thermal mass affects dynamically changing room air temperature. The selected steady-state and dynamic models were validated with the experimental results of a lecture room and an orchestra rehearsal room. Among the presented models, dynamic DV model demonstrated a capability to take into account the combination of dynamic parameters in typical applications of DV. The design airflow rate is calculated for the case studies of dynamic DV design in the modelled lecture room in both dynamic and steady-state conditions. In dynamic conditions of heavy construction in 2–4 hours occupancy periods, the actual airflow rate required could be 50% lower than the airflow rate calculated with the steady-state models. The difference between steady-state and dynamic multi-nodal model is most significant with heavyweight construction and short occupancy period (17%–28%). In cases with light construction, the dynamic DV model provides roughly the same airflow rates for four-hour occupancy period than the Mund’s model calculates. The dynamic model can significantly decrease the design airflow rate of DV, which can result in a reduction of investment costs and electrical consumption of fans.

当过热是主要的室内气候问题时，通常在置换通风（DV）设计中采用基于温度的方法。已经开发并实施了不同的稳态模型，以计算带有DV的房间中的空气流速。但是，在实际应用中，DV的性能取决于潜在的动态参数，例如强度，热量获取的类型和位置以及不断变化的热量获取时间表。此外，热质会影响动态变化的室内空气温度。选定的稳态和动态模型已通过演讲室和乐团排练室的实验结果进行了验证。在提出的模型中，动态DV模型展示了在DV的典型应用中考虑动态参数组合的能力。在模拟教室中，在动态和稳态条件下，针对动态DV设计的案例研究计算出设计风量。在2到4个小时使用期内的重型建筑的动态条件下，所需的实际空气流量可能比使用稳态模型计算的空气流量低50％。稳态结构和动态多结点模型之间的差异在重量级结构和较短的占用期时最为明显（17％–28％）。在轻型结构的情况下，动态DV模型在四个小时的使用期内提供的风量与Mund模型计算的大致相同。动态模型可以显着降低DV的设计风量，从而可以降低投资成本和风扇的电耗。