Steady-State Performance Prediction for a Variable Speed Direct Expansion Air Conditioning System Using a White-Box Based Modeling Approach

A Modeling Study on the Operational Stability of a Variable Speed Direct Expansion Air Conditioning System

This paper reports on a modeling study on the operational stability of an electronic expansion valve (EEV) controlled variable speed (VS) direct expansion (DX) air conditioning (A/C) system. An existing detailed, physical based dynamic model for a VS DX A/C system was further developed by adding equations for EEV’s temperature sensor. Using this further developed model, a modeling study on the ...

A New Control Approach for a Direct Expansion (DX) Air Conditioning (A/C)System with Variable Speed Compressor and Variable Speed Supply Fan

Optimal Control of a Variable-Speed Wind Energy Conversion System: A New Approach

The operation of wind energy conversion systems mainly deals with variable and unpredictable wind regimes resulting in variable power efficiency. In addition, nowadays with the presence of high penetration level of wind farms integrated to power systems, stability and power quality problems might be addressed, when a disturbance event occurs. These challenges are worsened with significant degre...

A new procedure for performance prediction of air conditioning coils

A new numerical model has been developed for the simulation of pate-fin-tube type of cooling and dehumidifying coils widely used in the air conditioning industry. The model discretizes the coil into nodes along the coolant path and carries out repetitive marches from the coolant inlet to its outlet while simultaneously updating the values of the air stream properties for obtaining quick converg...

Modeling of a Rectifier Connected PMSG Applied in Wind Energy Conversion System Using State Machine Approach

Accurate modeling of the wind energy conversion system is necessary to design and implementation of the control loop for the generator and the frequency converter, in order to extract maximum power from the wind and to investigate the effects of interconnection between wind farms and power system. In this paper the combination of a permanent magnet synchronous generator loaded with a diode rect...