Research on the Underground Heat Storage Possibilities

Pytlik, Adam; Janečková, Nikola; Grycz, David; Bujok, Petr; Malek, Ondrej; Клемпа, Мартин; Porzer, Michal

doi:10.17654/mt013030379

Cited by 1 publication

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“…It is necessary to respect especially thermal conductivity of massive rock as a whole and, concerning the larger installations, also the thermal conductivity of individual minerals that is dependent on structural properties, type and mineral composition of rock as well as thermal capacitance of minerals. Minerals containing higher share of silica have the highest conductivity, while the lowest conductivity belongs to siltstone and claystone [4,34].…”

Section: Ground Characterisation From the Thermal Energy Production Point Of Viewmentioning

confidence: 99%

Inquiry into the Temperature Changes of Rock Massif Used in Energy Production in Relation to Season

Клемпа

Látal

Grafova

et al. 2021

Sensors

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This research was undertaken to perform and evaluate the temperature measurement in the ground utilized as an energy source with the goal to determine whether significant temperature variations occur in the subsurface during the heating season. The research infrastructure situated on our University campus was used to assess any variations. The observations were made at the so called “Small Research Polygon” that consists of 8 monitoring boreholes (Borehole Heat Exchangers) situated around a borehole used as an energy source. During the heating season, a series of monthly measurements are made in the monitoring boreholes using a distributed temperature system (DTS). Raman back-scattered light is analysed using Optical Frequency Time Domain Reflectometry (OTDR). Our results indicate that no noticeable changes in temperature occur during the heating season. We have observed an influence of long-term variations of the atmospheric conditions up to the depth of a conventional BHE (≈100 m). The resulting uncertainty in related design input parameters (ground thermal conductivity) was evaluated by using a heat production simulation. Production data during one heating season at our research facilities were evaluated against the design of the system. It is possible to construct smaller geothermal installations with appropriate BHE design that will have a minimal impact on the temperature of the surrounding rock mass and the system performance.

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Section: Ground Characterisation From the Thermal Energy Production Point Of Viewmentioning

confidence: 99%