Análisis termográfico en un intercambiador de calor utilizando óxido de grafeno

Abstract

The objective of this research project was to develop thermographic analysis in a heat exchanger using graphene oxide (GO), this chemical compound being synthesized in the laboratory and subsequently applied in different concentrations inside the heat exchanger. The method used to obtain GO is Hummers Modified, which is going to be used as an insulator or semiconductor, it has a high hydrophilicity, its thermal conductivity is in the order of 18±2 (W/mK); On the other hand, through a visual inspection of the heat exchanger based on the ANSI/ASME B31.G standard, different faults have been found, such as the presence of corrosion, hindering its optimal operation. In addition, tests were carried out with distilled water in the heat exchange module, and by means of different GO dilutions on distilled water, comparing the temperatures of the thermograms obtained through the ISO 18434 standard. Giving results through obtaining thermograms at two meters of distance by means of the thermographic cameras and the analysis with the Satir Report software, on the copper coil, without the GO and with different GO dilutions: 1,32%, 2,64%, 3,96% in 3785 mL of distilled water. To analyze the data obtained, numerical methods and heat transfer efficiency were used, necessary to make a comparison of the temperatures of the tests without GO and the aforementioned percentages. Concluding that when calculating the average logarithmic temperature difference, it is observed that the GO does not improve the technical diagnosis, since it decreases the thermal capacity by 0,37 each degree centigrade in preliminary tests. It is recommended that for future research with nanomaterials it is necessary to analyze the thermal conductivity to increase the temperature inside the copper coil and to improve the technical diagnosis