Power consumption and energy efficiency of VRF system based on large scale monitoring virtual sensors
Power consumption and energy efficiency of VRF system based on large scale monitoring virtual sensors
复制标题
DOI：
10.1007/s12273-020-0670-x
复制
发表时间：
2020-07
影响因子：
5.5
通讯作者：
Mingyang Qian;D. Yan;Hua Liu;U. Berardi;Ye Liu
中科院分区：
文献类型：
--
作者：
Mingyang Qian;D. Yan;Hua Liu;U. Berardi;Ye Liu
空间供冷能耗是建筑能耗的重要组成部分，近年来由于其使用量的显著增加而引起了世界范围内的广泛关注。变制冷剂流量（VRF）系统是我国建筑中常用的制冷设备之一，广泛应用于住宅和办公建筑。多联供冷系统的性能对建筑物的供冷能耗有着重要的影响。系统能效和用电量是评价多联式空调系统性能的主要指标。由于多联式空调系统的能耗和能耗测量方法复杂、成本高，很难获得其实际的能耗和能耗。本研究提出了一种虚拟传感器建模方法，以确定实际的能源效率和电力消耗的344 VRF系统在住宅建筑。通过统计分析和聚类分析，确定了我国住宅建筑多联空调系统的能效和用电量，得到了我国住宅建筑多联空调系统的分布和典型运行负荷模式。主要研究结果如下：供冷季季节能效比（SEER）的主要范围为2.9 ~ 4.4;夏热冬冷地区SEER的中位数低于其他气候区;供冷持续时间越长，用电量越大;多联供冷系统的用电负荷具有周期性。数据集中的VRF系统普遍存在尺寸过大的问题，这也导致了VRF系统的能源效率较低。VRF系统的高使用率出现在7月27日至8月26日。研究结果为住宅建筑中VRF系统的设计提供了建议。
Space cooling energy consumption is a significant component of building energy consumption, and in recent years it has attracted much attention worldwide owing to its significantly increasing usage. The variable refrigerant flow (VRF) system is one common type of cooling equipment for buildings in China and is applied extensively to residential and office buildings. The performance of VRF systems significantly influences the cooling energy consumption of buildings. The system energy efficiency and electricity consumption are the main indicators employed to evaluate the performance of VRF systems. It is hard to obtain the actual energy efficiency and electricity consumption of VRF systems in buildings because of the high cost of the required complicated measurements. This study proposes a virtual sensor modeling method to determine the actual energy efficiency and electricity consumption of 344 VRF systems in residential buildings. Statistical and clustering analyses are conducted to determine the energy efficiency and electricity consumption to obtain distributions and typical operation load patterns of VRF systems in residential buildings in China. The main findings are as follows: the main range of the Seasonal Energy Efficiency Ratio (SEER) for the cooling season is from 2.9 to 4.4; the median SEER in the Hot Summer and Cold Winter zone is lower than in another climate zones; the longer cooling duration may lead to greater electricity consumption, and the electricity load for VRF systems electricity load is periodic for each day. The oversizing issue is common for VRF systems in the dataset, which also led to the lower energy efficiency of VRF systems. The high usage of VRF systems appeared from July 27th to August 26th. The findings provide recommendations for designing VRF systems in residential buildings.