This study investigates the dehumidification and energy performance of central ventilation systems based on a liquid desiccant-assisted dedicated outdoor air system applied to an apartment residential building. This heat-driven central ventilation system should receive heat energy because of regenerating the liquid desiccant. An organic Rankine cycle (ORC) consists of the central ventilation system proposed in this study to provide heat to the regeneration of the desiccant solution. The overall configuration of the ventilation system consists of three main devices, a liquid type of desiccant system, an evaporative cooler driven indirectly to utilize free cooling energy, and the electric heating coil to supply the process air at a neutral temperature condition. The size of the ORC is determined to provide the base electricity demand of community facilities in the apartment selected in this study. The evaluation of the size and energy performance is conducted through a detailed simulation. The results of the energy simulation are compared with heat-driven desiccant wheel and conventional energy recovery ventilation systems. The proposed system demonstrates 4%–24% lower annual primary energy consumption than two existing ventilation systems. This result can be expected that the proposed liquid desiccant-based central ventilation system incorporating ORC is possible to contribute to the achievement of the zero-energy building by using both electricity and heat energy.

本研究调查了基于液体干燥剂辅助专用室外空气系统应用于公寓住宅楼的中央通风系统的除湿和能源性能。由于再生液体干燥剂，这种热驱动的中央通风系统应该接收热能。有机朗肯循环 (ORC) 由本研究中提出的中央通风系统组成，为干燥剂溶液的再生提供热量。通风系统的整体配置由三个主要设备组成，液体型干燥剂系统，间接驱动以利用自由冷却能量的蒸发冷却器，以及在中性温度条件下供应工艺空气的电加热盘管。确定 ORC 的大小以提供本研究所选公寓中社区设施的基本电力需求。尺寸和能量性能的评估是通过详细的模拟进行的。能量模拟的结果与热驱动除湿轮和传统的能量回收通风系统进行了比较。与现有的两个通风系统相比，拟议系统的年度一次能源消耗量降低了 4%–2​​4%。该结果可以预期，所提出的包含 ORC 的基于液体干燥剂的中央通风系统有可能通过同时使用电能和热能为实现零能耗建筑做出贡献。能量模拟的结果与热驱动除湿轮和传统的能量回收通风系统进行了比较。与现有的两个通风系统相比，拟议系统的年度一次能源消耗量降低了 4%–2​​4%。该结果可以预期，所提出的包含 ORC 的基于液体干燥剂的中央通风系统有可能通过同时使用电能和热能为实现零能耗建筑做出贡献。能量模拟的结果与热驱动除湿轮和传统的能量回收通风系统进行了比较。与现有的两个通风系统相比，拟议系统的年度一次能源消耗量降低了 4%–2​​4%。该结果可以预期，所提出的包含 ORC 的基于液体干燥剂的中央通风系统有可能通过同时使用电能和热能为实现零能耗建筑做出贡献。