Optimisation of experimental operation of borehole thermal energy storage

Rapantová, Naďa; Pospíšil, Pavel; Koziorek, Jiří; Vojcinak, Petr; Grycz, David; Rozehnal, Zdeněk

doi:10.1016/j.apenergy.2016.08.091

Cited by 44 publications

(28 citation statements)

References 53 publications

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“…It was concluded that the combined effect of these parameters can significantly reduce BTES performance. In [7], cycles of heat injection and extraction for a BTES system used for storage of industrial excess heat were optimized with the objective to maximize long-term BTES efficiency. A feasible long-term BTES efficiency of 65% was predicted.…”

Section: Earlier Studies Investigating the Influence Of Various Systementioning

confidence: 99%

“…A literature review shows a handful of publications presenting and evaluating the performance of BTES systems, which includes aforementioned publications [4][5][6]. With the exception of one evaluation, [7], presenting a BTES system for storage of heat from combined heat and power, these consider BTES systems for storage of solar thermal energy. In Chifeng, China, a BTES system is in part used for storage of heat from a copper plant.…”

Section: Introductionmentioning

confidence: 99%

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Borehole Thermal Energy Storage Systems for Storage of Industrial Excess Heat : Performance Evaluation and Modelling

Nilsson

2020

Linköping Studies in Science and Technology. Licentiate Thesis

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I want to thank Leif Rydell at Xylem Water Solutions and Manufacturing AB for valuable discussions and for assistance in data collection, making the execution of this project possible. Lastly, I want to thank friends and family for being around. Thesis outline Chapter 1 introduces the overall research field and motivates the research of the thesis. The chapter presents the thesis research questions, the research scope and its limitations, and coauthor statements of the publications on which the thesis is based. Chapter 2 starts with a brief review of the excess heat potential for delivery to the district heating network for Sweden and the EU27 countries, followed by a short description of some prominent methods for long-term storage of thermal energy. The chapter then ends with a more detailed overview on BTES system technique and BTES systems reported in the literature. Chapter 3 presents the research design and the methods used to conduct the research. Chapter 4 describes the industrial site and BTES system used as study object for the research. Chapter 5 outlines input data and assumptions for conducted model validation and parameterization. Chapter 6 summarizes results from appended papers relevant to the thesis research questions. Chapter 7 presents main conclusions and findings from the research and final thoughts are given. The chapter ends with suggestions for future research.

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Section: Earlier Studies Investigating the Influence Of Various Systementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Borehole Thermal Energy Storage Systems for Storage of Industrial Excess Heat : Performance Evaluation and Modelling

Nilsson

2020

Linköping Studies in Science and Technology. Licentiate Thesis

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“…Conventionally, the TAZ is assumed as the subsurface volume characterized by a variation of at least 1 • C from the undisturbed temperature (e.g., [12]). Currently, the spatial and temporal control of the underground temperature evolution and the TAZ quantification can be provided through three different approaches: (i) Direct monitoring, with temperature sensors distributed along boreholes (e.g., [4,13]) or with fiber optic distributed temperature sensing (DTS; e.g., [14][15][16] and references therein); (ii) numerical modelling of heat transport and thermal propagation, with appropriate software and detailed simulations (e.g., [17][18][19]); and (iii) geophysical surveys, such as electrical resistivity tomography (ERT; e.g., [20][21][22]) and self-potentials (e.g., [23]).…”

Section: Introductionmentioning

confidence: 99%

Time-Lapse 3D Electric Tomography for Short-time Monitoring of an Experimental Heat Storage System

et al. 2019

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A borehole thermal energy storage living lab was built nearby Torino (Northern Italy). The aim of this living lab is to test the ability of the alluvial deposits of the north-western Po Plain to store the thermal energy collected by solar panels. Monitoring the temperature distribution induced in the underground and the effectiveness of the heat storage in this climatic context is not an easy task. For this purpose, different temperature evolution strategies are compared in this paper: Local temperature measurements, numerical simulations and geophysical surveys. These different approaches were compared during a single day of operation of the living lab. The results of this comparison allowed to underline the effectiveness of time-lapse 3D electric resistivity tomography as a non-invasive and cost-effective qualitative heat monitoring tool. This was obtained even in a test site with unfavorable thermo-hydrogeological conditions and high-level anthropic noise. Moreover, the present study demonstrated that, if properly calibrated with local temperature values, time-lapse 3D electric resistivity tomography also provides a quantitative estimation of the underground temperature.

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“…The system has been operated since 2003 with overall good performance. Several other HT-BTES have also been built outside of Sweden, such as the HT-BTES in Braedstrup, Denmark (Tordrup, et al 2017;PlanEnergi, 2013), and in Necklarsum and Crailsheim in Germany (Nußbicker, et al, 2003;Schneider, 2013), Okotoks, Canada (Sibbitt, et al, 2015) and in Paskov, Czech Republic (Grycz, et al, 2014;Rapantova, et al, 2016). In Table 1 a summary including years of operation, storage volume and maximal storage temperature reached for the above-mentioned HT-BTES, including the ones in Sweden, is given.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the BTES in Braedstrup is solar-assisted while being connected to the local CHP-plant supplying district heating to the community. The BTES in Paskov is an experimental HT-BTES charged by excess heat from a CHP-unit taken into operation in 2011 (Grycz, et al, 2014;Rapantova, et al, 2016). The storage was built for experimental purpose with the aim to study the storage system and the rock environmental behavior during different operating states of charging and discharging.…”

Section: Introductionmentioning

confidence: 99%

High temperature borehole thermal energy storage - A case study

Malmberg¹,

Mazzotti²,

Acuña³

et al. 2018

Proceedings of the IGSHPA Research Track 2018

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Combining High-Temperature Borehole Thermal Energy Storages (HT-BTES) with existing Combined Heat and Power (CHP) systems running on waste fuels seems to be a promising approach to increase the energy efficiency of district heating systems through recovery of excess heat summertime from the waste-to-energy operation. This paper presents a case study from Sweden where the potential for charging and discharging waste heat at 95°C from a CHPplant in summer into and from a HT-BTES is investigated. The interaction between the HT-BTES and the CHP-plant has been simulated with the software tool TRNSYS using the DST (Duct Ground Heat Storage Model) and a number of other TRNSYS tools. The aim of the study has been to design the size and operation of the HT-BTES with regard to energy and power coverage. Several different potential system configurations are presented in this paper

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Optimisation of experimental operation of borehole thermal energy storage

Cited by 44 publications

References 53 publications

Borehole Thermal Energy Storage Systems for Storage of Industrial Excess Heat : Performance Evaluation and Modelling

Borehole Thermal Energy Storage Systems for Storage of Industrial Excess Heat : Performance Evaluation and Modelling

Time-Lapse 3D Electric Tomography for Short-time Monitoring of an Experimental Heat Storage System

High temperature borehole thermal energy storage - A case study

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