关于平行风扇驱动的VAV终端装置的冷却空气泄漏问题一直存在争议。在德克萨斯农工大学校园的两栋旧建筑中，对多个串联和并联风扇供电的终端装置进行了定性观察，以提供有关该问题的定量数据。对装置进行仪表化，以记录装置附近的静压箱温度、装置入口和下游的静压，以及装置风扇上的静压升高。本研究中的机组结果表明，风机静压上升与文献中的结果一致，变化范围为0.10至0.35英寸。w、 对于配备PSC电机和SCR控制器的8英寸（200 mm）进口系列FPTU，在500至1300 ft3/min（0.236至0.613 m3/s）的范围内，g.（25.0至87.2 Pa）。发现下游静压数据与行业公认标准AHRI/ANSI 880第7节不一致。 2.1.2基本上将最小下游静压设定为0.25 in w.g.（62.2 Pa）。对于测试的单元，数值范围为0.042英寸。w、 g.（10.4帕）至0.10英寸。w、 g.（25.2帕）。并联机组周围的温度数据表明，只有一台机组存在明显的冷空气泄漏，而进气口的持续60°F（15.5°C）温度表明，该机组正通过防回流阀泄漏大量一次空气，并从进气口流出。Bryant等人2010年的研究结果表明，在一次气流泄漏量为20%或更大的情况下，在能量模拟中对并联VAV终端单元泄漏进行建模，会产生比可比串联VAV系统消耗更多能量的系统。引用:2019年冬季会议，佐治亚州亚特兰大，会议论文

There has been debate about leakage of cooling air from parallel fan powered VAV terminal units. A qualitative set of observations were performed on a number of series and parallel fan powered terminal units located in two of the older buildings on the campus of Texas A&M University to provide quantitative data on this issue. The units were instrumented to record plenum temperatures near the unit, static pressure at the entrance and downstream of the unit, and the static pressure rise across the unit fan. Results for the units in this study showed that fan static pressure rise was consistent with results found in the literature and varied from 0.10 to 0.35 in. w.g. (25.0 to 87.2 Pa) for the range of 500 to 1300 ft3/min (0.236 to 0.613 m3/s) for an 8 inch (200 mm) inlet series FPTU supplied with a PSC motor and SCR controller. Data for downstream static pressure was found to be inconsistent with industry accepted standard AHRI/ANSI 880 section 7.2.1.2 which essentially sets the minimum downstream static pressure as 0.25 in w.g. (62.2 Pa). For the units tested, the values ranged from 0.042 in. w.g. (10.4 Pa) to 0.10 in. w.g. (25.2 Pa). Temperature data around the parallel units showed that only one unit had significant cool air leakage and the consistent 60°F (15.5°C) temperature at the induction port showed that the unit was leaking a considerable amount of primary air past the backflow preventer and out of the induction port. The results of Bryant et al, 2010 suggests that modeling parallel VAV terminal unit leakage in energy simulations with 20% or greater of primary airflow leakage, yields a system that consumes more energy than a comparable series VAV system.