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

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...

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Autores principales:	Martin Klempa, Jan Latal, Barbora Grafova, Michal Matloch Porzer, Mojmir Vrtek, Antonin Kunz, Petr Siska
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	borehole heat exchanger ground temperature field ground thermal conductivity ground source heat pump Raman-OTDR (DTS) temperature measurement Chemical technology TP1-1185
Acceso en línea:	https://doaj.org/article/443fa1ec5979417aa5494853e077d494
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id	oai:doaj.org-article:443fa1ec5979417aa5494853e077d494
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spelling	oai:doaj.org-article:443fa1ec5979417aa5494853e077d4942021-11-11T19:03:40ZInquiry into the Temperature Changes of Rock Massif Used in Energy Production in Relation to Season10.3390/s212170271424-8220https://doaj.org/article/443fa1ec5979417aa5494853e077d4942021-10-01T00:00:00Zhttps://www.mdpi.com/1424-8220/21/21/7027https://doaj.org/toc/1424-8220This 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.Martin KlempaJan LatalBarbora GrafovaMichal Matloch PorzerMojmir VrtekAntonin KunzPetr SiskaMDPI AGarticleborehole heat exchangerground temperature fieldground thermal conductivityground source heat pumpRaman-OTDR (DTS)temperature measurementChemical technologyTP1-1185ENSensors, Vol 21, Iss 7027, p 7027 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	borehole heat exchanger ground temperature field ground thermal conductivity ground source heat pump Raman-OTDR (DTS) temperature measurement Chemical technology TP1-1185
spellingShingle	borehole heat exchanger ground temperature field ground thermal conductivity ground source heat pump Raman-OTDR (DTS) temperature measurement Chemical technology TP1-1185 Martin Klempa Jan Latal Barbora Grafova Michal Matloch Porzer Mojmir Vrtek Antonin Kunz Petr Siska Inquiry into the Temperature Changes of Rock Massif Used in Energy Production in Relation to Season
description	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.
format	article
author	Martin Klempa Jan Latal Barbora Grafova Michal Matloch Porzer Mojmir Vrtek Antonin Kunz Petr Siska
author_facet	Martin Klempa Jan Latal Barbora Grafova Michal Matloch Porzer Mojmir Vrtek Antonin Kunz Petr Siska
author_sort	Martin Klempa
title	Inquiry into the Temperature Changes of Rock Massif Used in Energy Production in Relation to Season
title_short	Inquiry into the Temperature Changes of Rock Massif Used in Energy Production in Relation to Season
title_full	Inquiry into the Temperature Changes of Rock Massif Used in Energy Production in Relation to Season
title_fullStr	Inquiry into the Temperature Changes of Rock Massif Used in Energy Production in Relation to Season
title_full_unstemmed	Inquiry into the Temperature Changes of Rock Massif Used in Energy Production in Relation to Season
title_sort	inquiry into the temperature changes of rock massif used in energy production in relation to season
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/443fa1ec5979417aa5494853e077d494
work_keys_str_mv	AT martinklempa inquiryintothetemperaturechangesofrockmassifusedinenergyproductioninrelationtoseason AT janlatal inquiryintothetemperaturechangesofrockmassifusedinenergyproductioninrelationtoseason AT barboragrafova inquiryintothetemperaturechangesofrockmassifusedinenergyproductioninrelationtoseason AT michalmatlochporzer inquiryintothetemperaturechangesofrockmassifusedinenergyproductioninrelationtoseason AT mojmirvrtek inquiryintothetemperaturechangesofrockmassifusedinenergyproductioninrelationtoseason AT antoninkunz inquiryintothetemperaturechangesofrockmassifusedinenergyproductioninrelationtoseason AT petrsiska inquiryintothetemperaturechangesofrockmassifusedinenergyproductioninrelationtoseason
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Inquiry into the Temperature Changes of Rock Massif Used in Energy Production in Relation to Season

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