Faults occurring in improper routine operations and poor preventive maintenance of heating,
ventilating, air conditioning, and refrigeration systems (HVAC&R) equipment result in …

Buildings are responsible for 40% of global energy use and contribute towards 30% of the
total CO2 emissions. The drive to reduce energy use and associated greenhouse gas …

This study reviewed VAV systems modeling and simulations, control strategies and
optimization tools, the airflow characteristics of VAV systems, some common VAV systems׳ …‎

Data-driven methods for fault detection and diagnosis of air handling units (AHUs) have
attracted wide attention as they do not require high-level expert knowledge of the system of …

The paper presents a strategy based on the principal component analysis (PCA) method,
which is developed to detect and diagnose the sensor faults in typical air-handling units …

Fault detection and diagnosis (FDD) for heating, ventilation and air conditioning (HVAC)
equipment significantly impact energy consumption in both residential and commercial …

This paper describes a scheme for on-line fault detection and diagnosis (FDD) at the
subsystem level in an Air-Handling Unit (AHU). The approach consists of process …

This paper presents an expert rule set for air-handling units (AHUs) and examines the
performance of the rule set using simulation and field data. APAR (air-handling unit …

Abstracts Sensors play essential roles in industrial automatic control systems. The faulty or
inaccurate sensors may cause uncomfortable thermal environments, shortened component …

This paper presents a self-adaptive sensor fault detection and diagnosis (FDD) strategy for
local system of air handing unit (AHU). This hybrid strategy consists of two stages. In the first …