This repository holds the data, python scripts for modeling and notebooks for data preparation and evaluation of the results for the paper "Thermal performance response and heat load redistribution mechanism of a deep U-type borehole heat exchanger in heating systems" submitted to Applied Energy.
For the paper open source software for thermodynamic plant modeling (Thermal Engineering Systems in Python: TESPy) and for thermo-hydro-mechanical-chemical modeling of the subsurface (OpenGeoSystems: OGS) have been coupled.
- DUBHE: Deep U-Type Borehole Heat Exchanger
- GSHP: Ground Source Heat Pump
After downloading install the requirements within a fresh virtual environment:
python -m pip install -r requirements.txtThe two simulators have been coupled according to the figure below. The heat demand time series controls the operation of the heat pump. Based on the heat demand, the heat demand temperature level as well as the BHE flow rate and outflow temperature the heat pump model calculates the BHE re-injection temperature. Next, the DUBHE simulation is started to update the BHE outflow temperature. Once convergence on the BHE outflow temperature has been reached, the iteration process is started for the next time step in the heat demand time series.
Coupling scheme for OGS and TESPy
For the heat pump model TESPy has been used:
- Francesco Witte, Ilja Tuschy (2020). TESPy: Thermal Engineering Systems in Python. Journal of Open Source Software, 5(49), 2178, 10.21105/joss.02178
For the subsurface model OGS has been used:
- Chaofan Chen, Wanlong Cai, Dmitri Naumov, Kun Tu, Hongwei Zhou, Yuping Zhang, Olaf Kolditz, and Haibing Shao (2021). Numerical investigation on the capacity and efficiency of a deep enhanced U-tube borehole heat exchanger system for building heating. Renewable Energy 169: 557-572. doi: 10.1016/j.renene.2021.01.033
For the case study on integration of the DUBHE coupled GSHP demand data have been used based on the following publication:
- Merlin Sebastian Triebs, Elisa Papadis, Hannes Cramer, George Tsatsaronis (2021). Landscape of district heating systems in Germany – Status quo and categorization. Energy Conversion and Management: X, 9, 100068, doi: 10.1016/j.ecmx.2020.100068.
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