Abstract
The purpose of this research is the calculation of the exergy destruction of the single-flash and double-flash cycles of a geothermal power plant located on the ladder of the 233 m Cerro Prieto volcano, on the alluvial plain of the Mexicali Valley, Mexico. The methodology developed in this research presents thermodynamic models for energy and exergy flows, which allows determining the contribution of each component to the total exergy destruction of the system. For the case-base, the results indicate that for the single-flash configuration the efficiency of the first and second law of thermodynamics are 0.1888 and 0.3072, as well as the highest contribution to the total exergy destruction is provided by the condenser. For the double-flash configuration, the efficiency of the first and second law of thermodynamics are 0.3643 and 0.4983. The highest contribution to the total exergy destruction is provided by the condenser and followed by the low-pressure turbine.
Highlights
Mexico has a National Interconnected Electrical System (NIES), there are three additional isolated electrical systems in the country that supply 7.1% of the energy: the Electrical System of Baja California Sur, the Electrical System Mulegé and the ElectricalSystem of Baja California [1]
In 2019, 14 utility-scale power plants were operational in Baja California with a combined installed capacity of 4049 MW, with 1102 MW destined for export to California, that left Baja California with an installed capacity of 2947 MW [2] out of which the geothermal power plants of Cerro Prieto made up 13% of total effective capacity in 2018
The exergy analysis was successfully used to evaluate the sensitivity of the total exergy destruction to the main operation variables for a single and double-flash geothermal power plant in Cerro Prieto, Mexicali, Mexico
Summary
Mexico has a National Interconnected Electrical System (NIES), there are three additional isolated electrical systems in the country that supply 7.1% of the energy: the Electrical System of Baja California Sur, the Electrical System Mulegé and the ElectricalSystem of Baja California [1]. Mexico has a National Interconnected Electrical System (NIES), there are three additional isolated electrical systems in the country that supply 7.1% of the energy: the Electrical System of Baja California Sur, the Electrical System Mulegé and the Electrical. The electrical system of Baja California is connected to the Western Electricity Coordinating Council in the United State via two permanent interconnections (Tijuana-Miguel and La Rosita Imperial Valley) that allow the import and export of energy. 115◦ 120 and 115◦ 180 W and the parallels 32.22◦ and 32◦ 260 N, 32 km from the US-Mexico western border (see Figure 1) It is the largest of the four Mexican fields in commercial exploitation, and the second largest worldwide, covering an area of 18 km , the reservoir reserves in the subsoil extend to cover other 50 km2 [3]. There are areas which the National electricity commission (CFE, in Spanish) has explored in order to locate medium-term geothermal resources that could increase reserves, these are located in the western part of the Geothermal Field of Cerro Prieto in the areas of Tulecheck, Laguna Salada, Lado east of the Sierra Cucap [4]
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