Study on the development and utilization prospection of shallow geothermal energy of saline underground water in Northern Shandong Plain |
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| Authors: | ZHAO Jichu JI Honglei LIU Huan |
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| Institution: | 1. No.2 Hydrogeology and Engineering Team of Shandong Geology and Mineral Exploration Bureau, Dezhou 253072, China;2. Shandong Engineering Technology Research Center for Geothermal Clean Energy Exploitation and Reinjection, Dezhou 253072, China |
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| Abstract: | In order to provide a way to expand clean heating energy and promote the utilization scale of groundwater heat pump system, the authors focused on the widespread saline water body in the study area, based on the stratigraphic characteristics of Quaternary strata. The distribution patterns of sand and saline water body of Quaternary were analyzed, and the pumping tests and reinjection hydrogeology tests from four previous shallowing geothermal energy exploration projects were summarized. The results show that the yield of a single well is 320-475 m3/d in saline water layers, with the unit yield of 12.76-28.3 m3/(d·m). And the natural reinjection rate is 30-56 m3/d, with the unit reinjection of 5.85-17.5 m3/(d·m). The total allowable heating floor area is 3 481.02 m2 for one well, which could satisfy the heat load of 35 rural houses in winter. The groundwater heat pump system is preferable in the shallow geothermal development in the study area, while the scatter distributed ground-coupled heat pump system is optional for single rural building with less energy need for space heating/cooling. |
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| Keywords: | shallow geothermal energy building heating groundwater heat pump ground-coupled heat pump |
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