Study and Modeling of Duct Parameters in VAV Air Conditioning System

The temperature rise and pressure losses along the ducts in variable air volume air conditioning system is essential to optimal energy-saving control.With ARX and artificial neural network identification,modeling temperature rise and pressure losses along ducts is presented according to experimental data of variable air volume air conditioning system.The relationship among them and the ambient conditions of the ducts are studied.The heating,ventilation,air conditioning simulation software HVACSIM+ is adopted to simulate the temperature rise and pressure losses and the results of simulation are compared with that of ARX,which confirms that HVACSIM+ is suitable to complicated system and system identification leads to more accurate results.