Modelo teórico para cuantificar la eficiencia térmica del calentador eléctrico en una secadora doméstica de ropa

Abstract

In this research paper, enhancement of generation and transfer heat on a tumbler dryer electric heater is achieved by a developed theoretical model, through the thermal efficiency estimation on the electric heater. Air mass flow and electric power interaction in the heater were used as inputs, and thermal efficiency was defined as the output of the model. It was considered the electric heater as an isolated component. Heater efficiency tests were performed in order to obtain the theoretical-physical correlation. From the obtained results, a typical over-damped system behavior was identified and a mathematical model that follow this trend was proposed. The R square prediction coefficient wass 0.96. Finally, the model was evaluated with high air mass flow getting a maximum relative error about 0.66 %, and provides enough information to rise heater thermal efficiency up to 7.7%. The power range for the model to predict efficiency is from 1 KW to 5 KW, the same as the recommended power range for use.