Modeling neighborhood-scale shallow geothermal energy utilization: a case study in Berlin

نویسندگان

چکیده

Abstract Nowadays, utilizing shallow geothermal energy for heating and cooling buildings has received increased interest in the building sector. Among different technologies, large borehole heat exchanger arrays are widely employed to supply various types of buildings. Recently, a 16-borehole array was constructed extract provide newly-developed public Berlin. To guarantee quality numerical model reveal its sensitivity subsurface conditions, simulations were conducted 25 years with two finite element simulators, namely open-source code OpenGeoSys applied commercial software FEFLOW. Given proper settings, simulation results from FEFLOW good agreement. However, further analysis reveals differences respect inflow temperature calculation implemented software. It is found that intrinsically uses outflow previous time step determine current temperature, which makes it capable much faster by avoiding iterations within single step. In comparison, always updates based on their values. Because performed after each iteration, delivers more accurate expense longer time. Based this case study, valid alternative modeling ground source pump systems. For modellers working field, thus recommended adopt small enough size, so potential error can be avoided.

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ژورنال

عنوان ژورنال: Geothermal Energy

سال: 2022

ISSN: ['2195-9706']

DOI: https://doi.org/10.1186/s40517-022-00211-9