由于单风管空气处理机组（SDAHU）向所有温度相同的区域提供冷却空气，因此冷却空气通常会被重新加热，以满足寒冷季节各区域的供暖需求。送风温度降低再热负荷；但是，它会增加内部区域的送风量，从而增加风扇功率。建议采用双支管处理机组（DBAHUs），将回风与冷却空气混合，以便在寒冷季节同时将热空气分配到外部区域，将冷空气分配到内部区域，以降低再热负荷。本研究的目的是通过仿真研究所提出的DBAHU的能量性能和控制。 首先，建立了SDAHUs和DBAHUs的热力学模型，然后对不同系统的能量性能，包括风机功率、接线盒再热和冷却盘管负荷，以及区域CO2浓度和湿度进行了模拟和比较。模拟结果表明，在寒冷季节，建议的DBAHU可以显著降低空气处理机组能耗12.3 W/m²（1.14 W/ft²），并将相对湿度提高至6%，室内空气质量可控，外部区域的CO2浓度低于1000 ppm。引文:2018年冬季会议，伊利诺伊州芝加哥，技术论文

Because single-duct air-handling units (SDAHUs) supplythe cooling air to all zones with the same temperature, the coolingair is normally reheated to satisfy the heating demand inexterior zones in cold seasons. Supply air temperature resetreduces the reheat load; however, it increases the supply airflowrate to the interior zones, which increases the fan power. Dualbranchair-handling units (DBAHUs) are proposed to mix thereturn air with the cooling air to simultaneously distribute thewarm air to exterior zones and the cold air to interior zones incold seasons to reduce the reheat load. The purpose of this studyis to investigate the energy performance and control of theproposed DBAHUs through simulations. First, the thermodynamicmodels are developed for both SDAHUs and DBAHUs,then the system energy performance, including the fan power,terminal box reheat, and cooling coil load, as well as zone CO2concentration and humidity, is simulated and compared amongdifferent systems. The simulation results reveal the proposedDBAHU can significantly reduce the AHU energy consumptionby 12.3 W/m2(1.14 W/ft2) in cold seasons and improve the relativehumidity up to 6% with controllable indoor air quality withthe CO2concentration less than 1000 ppm in exterior zones.