可变制冷剂流量（VRF）系统因其优于传统HVAC系统的部分负载性能而备受推崇。在模拟占用的多区域建筑中，完成了一项研究，以评估VRF系统与传统屋顶机组（RTU）可变风量（VAV）系统（带电阻再热）的满载和部分负载性能。为了实现这一点，通过调节整个建筑或选定区域，并相应地模拟占用情况，交替维持建筑中的满载和部分负载条件（即100%、75%和50%负载）。为了比较这两个系统的性能，每个系统交替运行一周，在这段时间内，三个负载条件中的每一个都保持了2小时- 3天，监测系统参数、室内外条件、负荷和能源使用。本文根据2015年夏季至2016年冬季的监测数据，介绍了这两个系统的制冷和供暖季节性能和能源使用情况。根据天气标准化HVAC能耗和季节平均COP，对系统性能进行了比较。根据分析，在100%、75%和50%的负载条件下，与RTU系统相比，VRF系统在冷却季节的节能率估计分别为30%、37%和47%。对于供暖季节，在100%、75%和50%负荷条件下，节能率分别为51%、47%和27%。 引文:2017年冬季会议，内华达州拉斯维加斯，会议论文

Variable refrigerant flow (VRF) systems are touted for their superior part-load performance compared to conventional HVAC systems. A study was completed to evaluate the full and part-load performance of a VRF system compared with a conventional rooftop unit (RTU) variable air volume (VAV) system with electric resistance reheating in a multi-zone building with emulated occupancy. To accomplish this, full and part-load conditions (i.e., 100%, 75% and 50% loads) in the building were maintained alternately by conditioning either the entire building or selected zones, and emulating the occupancy, accordingly. To compare the performance of the two systems, each system was operated alternately for a weeklong period during which each of the three load conditions were maintained for 2-3 days, and the system parameters, indoor and outdoor conditions, loads, and energy use were monitored. This paper presents the cooling and heating season performance and energy use of both systems based on the monitored data during the summer of 2015 through winter of 2016. System performance is compared in terms of weather-normalized HVAC energy consumption and seasonal average COP. Based on the analysis, the energy savings for the VRF system compared with the RTU system for the cooling season are estimated to be 30%, 37%, and 47% under the 100%, 75%, and 50% load conditions, respectively. For heating season, the energy savings are 51%, 47% and 27% under the 100%, 75%, and 50% load conditions, respectively.