Abstract
Abstract The development of geothermal energy promotes the changing of energy consumption structure in China. A series of experiments were performed to evaluate the geothermal resources of Rucheng County, which is the largest geothermal field in Central South China. The experiments include geothermal exploration, apparent resistivity, and determining the geochemical characteristics of the geothermal water. The experimental results show that the F3 fault zone and F1 hanging wall secondary fault are the main thermal control, heat conduction, water diversion, and thermal storage structures. The pH, EC, and Eh of the river water, shallow groundwater, and geothermal water exhibit seasonal changes. The pH and EC of the geothermal water are higher than those of the river water and shallow groundwater, while the Eh is lower. In addition, the corrosivity coefficient Kk and the Ryznar index are used to evaluate the corrosivity and calcium carbonate scaling of the geothermal water, and it is found that the geothermal water has no corrosiveness or calcium carbonate scaling, which indicates that the geothermal energy in Rucheng County has wide application prospects.
Highlights
The development of clean energy meets the demand of human development and alleviates the climate crisis brought from fossil energy use, such as coal and oil [1,2,3]
Şener and Baba [7] monitored the chemical and isotopic compositions of hot springs and geothermal fluids in the Kozakl area throughout the year, and the results showed that the geothermal fluids were formed by local recharge and deep circulation of flowing water
(4) Borehole curve of F3 footwall shallow metamorphic rock: this type of drilling curve is close to the longitudinal axis, indicating that the drilling is located in the fracture and alteration zones
Summary
The development of clean energy meets the demand of human development and alleviates the climate crisis brought from fossil energy use, such as coal and oil [1,2,3]. Many countries have committed to researching and developing new energy sources, including renewable energy such as solar, wind, biomass, and geothermal [4,5,6,7]. There has been a rapid development trend for geothermal energy [8,9,10,11,12]. The favored geothermal energy can be used for power generation and heating and for industrial, medical, bathing, and breeding needs. Geothermal resources should be reasonably assessed and moderately exploited.
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