(137b) Mathematical Model for Measurement of Carbon Permittivity

Coal is the most abundant fuel, versatile and available in the earth, global stocks are expected to continue until 250 years, so it becomes the most important energy source as it has been throughout its since history began to be implemented on locomotives and other transportation that worked with coal, promoted for the industrial revolution.

The use of coal as raw material requires a prior analysis of their composition that allows knowing the best process that should be used. Moreover, the complexity of coal in general, is such that there may be a wide variation of certain properties, even in coals that have the same origin or treatment, so it is essential to keep a detailed analysis of their composition and properties. Between these analysis are the dielectric properties, as is the permittivity, which is a physical constant that describes how an electric field affects and is affected by a medium, the permittivity is determined by the capacity of a material to polarize to the application of an electric field and thus partially cancel the internal field of the material, this property set to the behavior that will have the coals when exposed to an electromagnetic signal, marked as it spreads the energy in the material, as transforms the energy supplied by the microwave to heat the inside of it and, finally, indicates whether a material can be treated by means of microwave, providing valuable information for process heating and drying by microwave, which is the most viable way of warming and greater projection into the future because it provides even heating and fast, as it interacts with the material directly heats from the inside causing an agitation of the molecules which facilitates and speeds up the warming process.

Previous studies have identified several methods for the characterization of dielectric properties among which are the techniques of time domain reflectometry (TDR), the method of the guide shorted, perturbation method and some as the resonant cavity, S parameter method or the reflected wave method. These measurement methods have yielded data, processes and information that form the basis for further studies and designs, although still not enough for having performed for a frequency range or a specific frequency but difficult to achieve or is not handled.

The method of measuring the absorbed power, is proposed in this study, which is to apply to the test material a power known as a power which is provided to measure the amount of power absorbed by the material and then through a mathematical model to calculate the value of the permittivity.

In this paper we also hope that later you can implement this process for calculating the permittivity of solid substances, and why not? Adjust the equipment to find the property to liquid substances, data are not yet known.