Abstracts Book - IMRC 2018

• SF5-P049
TERA HERTZ EMISSION SIMULATION FOR FOOD QUALITY
CONTROL IN-SITU APPLICATION ON SOLAR DRYER
Erick H. Domínguez 1 , Jorge Evaristo Conde Diaz 2 , Ja Reyes Nava 1 , Edgar Briones 3 , Heber Vilchis 1
1 Universidad de Ciencias y Artes de Chiapas, Instituto de Investigación e Innovación en
Energías Renovables, Mexico. 2 Universidad de Ciencias y Artes de Chiapas, CONACYT-Instituto
de Investigación e innovación en energías renovables, Mexico. 3 ITESO, Universidad Jesuita de
Guadalajara, Matematicas y Fisica, Mexico.
The solar drying method its a way to preserve food in trend because is
environmental friendly and low cost. However, the temperature of the process
depends on weather conditions, Therefore the drying kinetics for different
products like a fruits vegetables and meat is measured in laboratories but the
method employed can’t use in real conditions on solar dryers.
To determine the loss of water that exists in food inside a solar dryer is
imperative because it allows conserve nutritional properties and increases
storage time to generate food safety. Nowadays, to determine the weight loss
of food in a solar dryer the chamber is opened and a sample of the loss of mass
is taken with a scale, this has the effect of reducing efficiency of solar dryer and
the rehydration of the food for the environmental nowadays determining the
removal of moisture inside the drying chamber has been poorly studied.
Tera Hertz (THz) radiation is electromagnetic radiation whose frequency lies
between the microwave and infrared regions of the spectrum this radiation is
nonionic, non-invasive for organic materials. Based on optical properties at THz
frequencies, condensed matter is largely grouped into three types: water, metal,
and dielectric. Water, a strongly polar liquid, is highly absorptive in the THz
region. So, this a promising radiation for quality control of solar dryers and insitu
monitoring food in dry process.
In this work we used the MEEP (MIT Electromagnetic Equation Propagation)
which is an open-source implementation of the FDTD (finite difference time
domain) method for numerically solving electromagnetic problems to study
better theoretical THz we varied gap THz, properties dielectric samples of
mango, stevia, grain coffee
The parameters obtained in this work are work thickness sample, absorption
THz in simulate water atmosphere and THz gap for specific dielectrics and