Diseño y construcción de un vaporizador eléctrico de uso doméstico : Diseño térmico, construcción, montaje y pruebas del vaporizador eléctrico de uso doméstico.

Abstract

The objective of this work is to carry out the thermal design, construction, assembly and testing of an electric vaporizer for domestic use in stable and transient states. The thermal analysis of the equipment in transient state serves to determine the heating power. For this, a mathematical model of temperature as a function of time is proposed with certain parameters to consider such as the power of the electrical resistance, the convection-radiation coefficient and inlet and outlet temperatures. Temperatures and heating times of the vaporization process will be obtained from this model. On the other hand, the thermal analysis of the vaporizer in steady state serves to determine the operating power and the insulation thicknesses in the vapor transport duct considering the heat transfer, losses and surface temperatures. With the results of the transient state analysis, it was obtained that the necessary power for heating water is 1500 [W] with a heating time of 4 [min] for 1000 [ml] of water and with a working temperature of equipment of 91 [ºC] from an initial temperature of 15 [ºC]. With the results of the steady-state analysis, an operating power of 100 [W] and a surface temperature of 40 [ºC] were determined in the vapor transport duct. From a cost analysis, the total cost of the electric vaporizer prototype was $653. Once the results were obtained, the construction of the vaporizer was carried out and tests of both functionality and normal operating conditions were carried out. Finally, it was concluded that the equipment that has been designed and built works properly, complying with steam generation. From the theoretical data we have that the water heats up in 240 [sec] to 91 [ºC] while, with the experimentation, the water heats up in 340 [sec] to 91 [ºC].