Abstract
In the context of China’s carbon summit strategy, as renewable clean energy, the development and utilization of shallow geothermal energy has broad prospects. Based on the analysis of the occurrence conditions of shallow geothermal energy in Nanchang City, the suitability zoning of the ground source heat pump project in Nanchang City is studied by using the analytic hierarchy process. The results show that Nanchang is very suitable for the construction of the ground source heat pump system. Among them, the suitable area of the groundwater ground source heat pump is 252.17 km2, the basically suitable area is 133.64 km2, and the unsuitable area is 124.29 km2. The suitable area of the buried pipe ground source heat pump is 180.49 km2, the basically suitable area is 320.82 km2, and the unsuitable area is 8.79 km2. The evaluation results can provide a basis for the development and utilization of shallow geothermal energy in Nanchang.
Highlights
Shallow geothermal energy refers to geothermal energy with value for development and utilization within a depth below the surface [1,2,3,4,5]
Most cities in China have carried out shallow geothermal energy suitability zoning research [21,22,23,24,25,26] to promote the rational development and utilization of the local shallow geothermal energy
The red bed aquifer is like the stratum, and the aquifer has good connectivity, generally 30~60 m; the metamorphic rock fissure aquifer is mainly distributed in the Xinjian-Muyu mountain area in the northwest of Nanchang City; the lithite is phyllite, phyllite slate, propylite, gneiss, etc.; the structural cracks are developed; and groundwater exists in the structural cracks
Summary
Shallow geothermal energy refers to geothermal energy with value for development and utilization within a depth below the surface (generally 200 m) [1,2,3,4,5]. Fang and Wei [17] carried out geological, hydrogeological, geothermal drilling, and related experiments on 13 prefecture-level cities in Hunan Province On this basis, they carried out the storage conditions, resources, and suitability of shallow geothermal energy. Wang and others [18] investigated the storage conditions of shallow geothermal energy within the research area of Longkou City and carried out the suitability zoning study using the analytic hierarchy process and index method. Most cities in China have carried out shallow geothermal energy suitability zoning research [21,22,23,24,25,26] to promote the rational development and utilization of the local shallow geothermal energy. Sand and gravel thickness < 5 m Elevation contours at the bottom of the gravel layer (m)
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