Prediction of the performance of double-tube heat exchanger equipped with 35 kHz ultrasound transducer by fuzzy logic modeling

In this work, fuzzy logic (FL) modeling was used to predict the performance of a concurrent flow double-tube heat exchanger in the absence and presence of ultrasound waves with the frequency of 35 kHz. Water was used as operating fluid. For modeling, FL was applied to describe the dependencies between outputs and input parameters. The status of ultrasonic wave presence and the hydraulic conditions of both internal tube (hot side) and external tube (cold side) were selected as input parameters. The heat flow rates of both hot and cold sides were taken as outputs. Eighteen experimental data sets were used for modeling. A comparison was made between the fuzzy predictions and experimental data. Mean relative error (MRE) and regression factor were 0.21% and 0.99998 for the hot side heat flow rate and 0.29 % and 0.99998 for the cold side heat flow rate. Based on the obtained results, the use of FL appears to be an accurate and simple way to model the performance of double-tube heat exchangers under the ultrasound field.

Keywords:

Fuzzy logic , modeling , double-tube heat exchanger , ultrasound , heat transfer