Advanced predictive maintenance and fault diagnosis strategy for enhanced HVAC efficiency in buildings

N Es-sakali, Z Zoubir, SI Kaitouni, MO Mghazli… - Applied Thermal …, 2024 - Elsevier
Variable refrigerant flow (VRF) systems are constantly prone to failures during their lifespan,
causing breakdowns, high energy bills, and indoor discomfort. In addition to correctly …

Experimental study on system characteristics of vapor compression refrigeration system using small-scale, gas-bearing, oil-free centrifugal compressor

X Qiu, J Hua, C Qian, J Wang, W Xuan, B Yu, J Shi… - Energy, 2024 - Elsevier
Small-scale refrigeration centrifugal compressors hold the potential for superior efficiency
compared to currently used positive displacement compressors. However, traditionally …

Refrigerant charge estimation method based on data-physic hybrid-driven model for the fault diagnosis of transcritical CO2 heat pump system

C Zhang, B Hou, M Li, C Dang, H Tong, X Li, Z Han - Energy, 2024 - Elsevier
The transcritical CO 2 heat pump system is a promising and excellent heating scheme.
However, the operating pressure of the transcritical CO 2 heat pump system is high, and …

[HTML][HTML] Energy-Efficiency-Oriented Spatial Configuration of VRV Outdoor Units in an Equipment Layer Under Background Wind Conditions

L Liu, H Huang, X Tian - Buildings, 2024 - mdpi.com
This study provides a spatial configuration method to improve the cooling efficiency of
multiple VRV outdoor units placed on equipment layers with high floors. Relevant factors …