A NEW PROCEDURE FOR PERFORMANCE PREDICTION OF AIR-CONDITIONING COILS

A new numerical model has been developed for the simulation of pare-fi n-tube type of cooling and dehumidifying coils widely used ia 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 ai r stream properties for obtaining quick convergence. Unlike previous m odels, this model is capable of analyzing complicated circuiting arran gements and can take into account the variation in heat transfer coeff icient alone the coil. Since the heat transfer and pressure drop throu gh each circuit are calculated separately, the model can be helpful in pointing out any maldistribution of coolant in various circuits of th e coil. (C) 1998 Elsevier Science Ltd and IIR. All rights reserved.