A review of recent advancements of variable refrigerant flow air-conditioning systems

H Wan, T Cao, Y Hwang, S Oh - Applied thermal engineering, 2020 - Elsevier
Variable refrigerant flow air-conditioning (VRF) systems are important and widely used
building energy systems around the world. This study reviews recent developments of the …

Review on recent developments of variable refrigerant flow systems since 2015

G Zhang, H Xiao, P Zhang, B Wang, X Li, W Shi… - Energy and …, 2019 - Elsevier
Variable refrigerant flow systems (VRFS) are gradually gaining popularity in commercial and
residential buildings owing to their satisfactory part-load performance, flexible control, and …

Energy conservation and renewable technologies for buildings to face the impact of the climate change and minimize the use of cooling

F Ascione - Solar Energy, 2017 - Elsevier
Facing the climate change is a common priority, due to ethical issues related to general
concept of sustainability and livable future for the next generations. Moreover, ethical aims …

A novel efficient SVM-based fault diagnosis method for multi-split air conditioning system's refrigerant charge fault amount

K Sun, G Li, H Chen, J Liu, J Li, W Hu - Applied Thermal Engineering, 2016 - Elsevier
For the multi-split variable refrigerant flow (VRF) system, the key of efficient operation is to
achieve the appropriate refrigerant charge amount (RCA). However, it is difficult to achieve …

Data partitioning and association mining for identifying VRF energy consumption patterns under various part loads and refrigerant charge conditions

G Li, Y Hu, H Chen, H Li, M Hu, Y Guo, J Liu, S Sun… - Applied energy, 2017 - Elsevier
Variable refrigerant flow systems account for a considerable portion of energy consumption
in buildings. In order to improve the energy efficiency and estimate the energy saving …

Refrigerant charge fault diagnosis in the VRF system using Bayesian artificial neural network combined with ReliefF filter

S Shi, G Li, H Chen, J Liu, Y Hu, L Xing, W Hu - Applied Thermal …, 2017 - Elsevier
A proper refrigerant charge amount (RCA) is critical for a variable refrigerant flow (VRF)
system since RCA may affect the operational performance. However, there were few studies …

Development and application of the load responsive control of the evaporating temperature in a VRF system for cooling energy savings

GY Yun, JH Lee, HJ Kim - Energy and Buildings, 2016 - Elsevier
The variable refrigerant flow system has received much attention due to its energy saving
potential and design flexibility. A load responsive control of the evaporating control in the …

Numerical and thermo-energy analysis of cycling in automotive air-conditioning operating with hybrid nanolubricants and R1234yf

MZ Sharif, WH Azmi, MF Ghazali… - … Heat Transfer, Part A …, 2023 - Taylor & Francis
Studies on automotive air-conditioning (AAC) systems involving compressor on-off cycling
are still limited. This study focuses on improving the cycling of the AAC system using hybrid …

A robust online refrigerant charge fault diagnosis strategy for VRF systems based on virtual sensor technique and PCA-EWMA method

J Liu, G Li, H Chen, J Wang, Y Guo, J Li - Applied Thermal Engineering, 2017 - Elsevier
The enhancement of fault detection and diagnosis (FDD) strategy for air-conditioning system
is always a complex difficulty. In previous studies, the virtual refrigerant charge (VRC) sensor …

Modeling Variable Refrigerant Flow (VRF) systems in building applications: A comprehensive review

J Wang, X Lu, V Adetola, E Louie - Energy and Buildings, 2024 - Elsevier
Abstract Variable Refrigerant Flow (VRF) systems have gained recognition for being energy-
efficient and adaptable for use in heating, ventilation, and air conditioning (HVAC) …