Operation characteristics based on a novel performance model based on capacity utilization rate of a variable refrigerant flow air conditioning system

被引：3
作者：
Xiao, Hansong [1 ,2 ]
Liu, Shurong [1 ,2 ]
Ding, Yunxiao [3 ]
Zheng, Chunyuan [3 ]
Luo, Bing [1 ,2 ,3 ]
Niu, Heng [1 ,2 ]
Shi, Jingfeng [1 ,2 ]
Wang, Baolong [1 ,2 ]
Song, Qiang [4 ]
Shi, Wenxing [1 ,2 ]
机构：
[1] Tsinghua Univ, Dept Bldg Sci, Beijing 100084, Peoples R China
[2] Tsinghua Univ, Sch Architecture, Beijing Key Lab Indoor Air Qual Evaluat & Control, Beijing 100084, Peoples R China
[3] GD Midea Heating &Ventilating Equipment Co Ltd, Lanzhou 528311, Guangdong, Peoples R China
[4] Haier A C Elect Co Ltd, Qingdao 266101, Peoples R China
来源：
ENERGY AND BUILDINGS | 2023年 / 294卷
关键词：
Variable refrigerant flow; Air conditioning system; Energy efficiency; Indoor unit; Performance model; SIMULATION;
D O I：
10.1016/j.enbuild.2023.113253
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
In the context of a large market share, enhancing the actual performance of variable refrigerant flow (VRF) airconditioning systems is of considerable importance. The operating states of indoor units (IUs) significantly influence the energy efficiency of a VRF system with multiple indoor terminals. Therefore, it is challenging to address accurate and concise representation of the operational characteristics of IUs for analyzing their impact on system performance. This study explored a novel performance index called capacity utilization rate (CUR) to illustrate the effect of IUs on system performance and developed a performance model based on this index. Simulation and experimental results demonstrated that energy efficiency and evaporating temperature decrease with a reduction in CUR under specific ambient temperatures and part-load rates. The proposed performance model was applied to real buildings in field tests to examine the operational characteristics of the VRF system. This research offers valuable insights for system design, performance simulation, and performance evaluation of VRF systems.
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收藏
页数：14
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