Polygeneration Study of Low-to-Medium Enthalpy Geothermal Reservoirs in Mexico  

作　　者：CHÁVEZ Oscar GODÍNEZ Francisco 

机构地区：[1]Tecnológico Nacional de México/I.T.Chihuahua.Av.Tecnológico 2909,C.P.31310,Chihuahua,Chihuahua,México [2]Instituto de Ingeniería,Universidad Nacional Autónoma de México,UNAM,C.U.,Ciudad de México,C.P.04510,México [3]Polo Universitario de Tecnología Avanzada,Universidad Nacional Autónoma de México,Vía de la Innovación No.410,Autopista Monterrey-Aeropuerto,km.10 PIIT,C.P.66629,Apodaca Nuevo León,México

出　　处：《Journal of Thermal Science》2021年第3期1077-1087,共11页热科学学报（英文版）

摘　　要：This study combines the thermodynamic analysis of a polygeneration system along with the numerical modelling of the thermal behavior of geothermal reservoirs in Mexico to exploit their energy.Each reservoir was modeled as a porous medium assuming a five-spot well configuration and local thermal equilibrium.The heat conduction-convection along with the Laplace equations were solved to compute temperature distributions,the useful life and the optimum distance between injection-extraction wells.The predicted temperature and pressure of the geothermal fluid at the outlet of the reservoir were exploited in the polygeneration system consisting of:(1)a Rankine cycle,(2)an absorption refrigeration cycle,and(3)a heat exchanger.The developed approach allows calculating both the optimal distance between injection-extraction wells and the global(utilization)efficiency of six arrangements(each composed by a reservoir connected to a polygeneration system)by assuming that reservoirs have a lifespan of 30 years.Results also show that:(a)due to the low efficiency of the Rankine cycle,very little thermal energy is converted into electrical one;(b)not only the temperature and the size are important when evaluating the power production performance of reservoirs,but also the permeability plays a fundamental role;(c)the first law efficiency of the polygeneration system ranges from 41.9%to 43.7%;(d)the utilization efficiency of the six arrangements lies in the range between 25.8%and 31%.

关 键 词：polygeneration system geothermal reservoir local thermal equilibrium low-to-medium enthalpy 

分 类 号：P314[天文地球—固体地球物理学]