Performance of a Plate Fin and Tube Dehumidifying Coil Using Entropy GenerationMethod

Abstract

The objective of the present work is to apply the concept of entropy generation method to evaluate the performance of a plate fin and tube dehumidifying coil. The present study provides an analytical method to model the working and performance of this coil as an independent part from the system without modeling the other parts that the system consisted of under wet and dry surface conditions for variable operating parameters. A comparison was made between the traditional effectiveness of the coil and the entropy generation modelto evaluate the performance of the coil for variable conditions. The study found that the entropy generation algorithm is more efficient and more sensitive to parameters change than traditional effectiveness to describe the performance of a dehumidifying coil depending onthe design and operating parameters. The combination of operating parameters of the coil such as air velocity, air wet bulb temperature, air dry bulb temperature, air relative humidity and heat load capacity affected the performance of the coil and the variable operatingparameters lead to variable performance, so the air velocity should be varied according to the state of entering air and the total space load during operation time to compensate the loss in performance and to save power consumed.