Long-term operational data of an energy pile wall in the Lainzer Tunnel in Vienna

Dataset description

This repository contains long-term monitoring data from the energy geostructure (EG) installation at the Lainzer Tunnel section LT24 in Vienna, Austria. The dataset accompanies the publication Brunner et al. (2026) and is intended to support reproducibility of the presented results as well as to serve as a foundation for future research on energy geostructures and long-term geothermal system behavior.

Methodology

The dataset comprises the measurements discussed in Brunner et al. (2026), including system-wide energy performance parameters from the service room (temperatures, flow rates, thermal energy), detailed temperature measurements within multiple energy piles, air, and ground and groundwater temperature monitoring. Measurements span three distinct phases: construction (2001–2004), active geothermal operation (2004–2022), and an ongoing idle phase (since 2022).

Dataset contents

The dataset is provided as comma-separated value (CSV) files encoded in UTF-8. Each file corresponds to a specific measurement type or sensor group, following the standardized sensor naming scheme described in the accompanying publication Brunner et al. (2026). File names follow the convention "Location_Measurement_Version", where "Location" identifies the measurement location (e.g., Pile, Ground, Serviceroom), "Measurement" describes the measured quantity and may consist of one or two entries separated by an underscore (e.g., Temperature_groundside, Performance_energy), and "Version" indicates the processing status where applicable (i.e., valid, final).

Some sensors required corrections due to drift, noise, or damage over the long monitoring period. Where applicable, files labeled "valid" contain only data that required no corrections, while files labeled "final" contain the fully processed dataset, where corrected values replace the raw data at points requiring correction.

Each file uses a semicolon as delimiter and follows a standardized structure: the first column contains the timestamp in ISO 8601 format (yyyy-MM-dd HH:mm:ss), while subsequent columns represent the individual sensor indicators (e.g., Tgw_{KB-13/01}). All numeric values are rounded to two decimal places. Missing values are represented by Not a Number (NaN). The data contain the original measurements without retiming as originally recorded.

The sensor To_{Mariabrunn} (Air_Temperature_outside_Mariabrunn.csv) contains daily mean outside air temperature data for the relevant time period sourced from Geosphere Austria (https://doi.org/10.60669/gs6w-jd70), where data at shorter intervals down to 10 minutes are also available. All other data originate from TU Wien.

Data coverage and updates

This dataset contains the data discussed in Brunner et al. (2026), covering measurements up to 2026-05-18 08:00. Future versions will include additional data from the ongoing monitoring program as well as measurements from sensors not included in the current release.