Analysis of simultaneous production of electricity, ice and dried products through geothermal cascade utilization
Ambríz Díaz, Víctor Manuel
Tututi Ríos, Pablo
Belman Flores, Juan M.
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In this paper, an analysis of the simultaneous production of electricity, ice and dried agricultural products using medium and low temperature geothermal energy through a cascade concept is presented. In order to carry out the analysis a set of practical and technical assumptions, that provide guidelines to integrate technologies making use of geothermal energy in cascade manner, are defined. The geothermal cascade system consists of three thermal levels operating sequentially and simultaneously at different temperatures in decreasing order. The first thermal level comprises an organic Rankine cycle machine for electricity production. A refrigeration absorption cycle is included for ice production at the second thermal level. Finally, the third thermal level comprises a geothermal-dryer for agricultural products. As economic profit depends on the type of agricultural product, in the analysis three local products are considered: avocado, green pepper and tomato. Once main practical and technical assumptions are established, five possible alternatives of integration and five different operation modes are proposed and evaluated. An energy and an economic model is proposed in order to evaluate the influence of temperature of geothermal resource, temperature of thermal levels, and amount of power, ice and amount of dried product produced, for each alternative and operation mode. Implementation of both models allows obtaining the energy and economic performance, as well as CO2 emission avoidance. The results indicate that the most profitable cascade system is the one drying tomato.
Document Type:Trabajo in extenso congreso
Citation:Ambríz Díaz, V.M., Rubio-Maya, C., Tututi Ríos, P., Pacheco Ibarra, J.J., Belman Flores, J.M., 2016. Analysis of simultaneous production of electricity, ice and dried products through geothermal cascade utilization, in: ECRES – 4th European Conference on Renewable Energy Systems. Istanbul, Turkey, p. 6.
UNESCO International Nomenclature: Tecnología energética -> Fuentes no convencionales de energía
INIS/ETDE Thesaurus:Geothermal energy