Application of neural network for the modeling and control of evaporative condenser cooling load

Artificial neural network (ANN), in comparison with PID controllers which have broad applications in the highly complex HVAC systems, has recently received more attention. The present paper includes thermodynamic modeling of an evaporative condenser under steady state and transient state conditions for establishing control of thermal capacity, using Artificial neural network. To train the system under dynamic condition, predictive neural network, capable of understanding dynamic behavior and predicting the preset output is used. The principle operation of such neural networks is based on the reduction of gradients of errors existing between the predicted output and the actual output of the system. To control the system thermal capacity, neural controller based on training received from the reduction of gradients between the output controller and the ideal output, is used. Results obtained during present investigation indicate that artificial neural network controller is suitable substitute for PID controllers for thermal systems.