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Título del libro: Proceedings Of The 25th International Conference On Efficiency, Cost, Optimization And Simulation Of Energy Conversion Systems And Processes, Ecos 2012
Título del capítulo: Thermoeconomic analysis and optimization of a hybrid solar-electric heating in a fluidized bed dryer

Autores UNAM:
ISAAC PILATOWSKY FIGUEROA;
Autores externos:

Idioma:
Inglés
Año de publicación:
2012
Palabras clave:

Air; Costs; Drying; Energy conversion; Energy utilization; Exergy; Fluidized beds; Hybrid systems; Moisture control; Optimization; Solar dryers; Alternative energy source; Habanero; Heat and moisture transfer; Optimum operation conditions; Solar drying; Technological development; Thermo-economics; Thermoeconomic analysis; Cost benefit analysis


Resumen:

In the last decades, the technological development based in alternative energy sources has been increased. Hybrid systems are still an emerging technological option and it is expected this technology will continue to evolve in the future, so that it will have wider applicability and lower costs, therefore, the application of techniques such as exergy analysis and thermoeconomic are useful to determine the basic energy cost and the possible competitiveness of these systems. In this research, a pilot prototype of a hybrid solar -electric system for air heating using a low temperature collector was developed as part of a redesign in the habanero chili drying, where a pre treatment by a solar dryer and a fluidized bed dryer were combined. Habanero chili is an important seasonal food product, so drying is so important for the Mexican producers. Exergy analysis was carried out to identify the operation conditions for the whole system and the potential savings, which can be made, such as, the air temperature and velocity (333 K and 6 m/s), while the product quality was preserved. As a demo for the ECOS 2012 template, text has been uploaded from the Universal Declaration of Human Rights. Detailed info on paper preparation can be found from Section 2 on. Whereas recognition of the inherent dignity and of the equal and inalienable rights of all members of the human family is the foundation of freedom, justice and peace in the world, The results showed that the rates of heat and moisture transfer are related to the velocity and temperature of the drying air utilized. A reduction in the average drying time of 50% and in the energy usage of 77% in the fluidized bed dryer were obtained, with an exergy saving of 2.6 KW that represents 0.52 kg of natural gas per kg of fresh habanero chili with the final moisture required of 5%. A thermoeconomic model was developed for the whole system to determine the optimum operation conditions;also, it predicts the savings in energy cost terms at industrial level. An innovative sustainable and efficient process was developed in drying, one of the most demanding and wasteful of energy in the industrial sector.


Entidades citadas de la UNAM: