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Claesson, Joachim, DocentORCID iD iconorcid.org/0000-0003-3896-2443
Publications (10 of 72) Show all publications
Fasci, M. L., Mazzotti, W., Lazzarotto, A. & Claesson, J. (2023). Temperature of energy boreholes accounting for climate change and the built environment - A new model for its estimation. Renewable energy, 202, 1479-1496
Open this publication in new window or tab >>Temperature of energy boreholes accounting for climate change and the built environment - A new model for its estimation
2023 (English)In: Renewable energy, ISSN 0960-1481, E-ISSN 1879-0682, Vol. 202, p. 1479-1496Article in journal (Refereed) Published
Abstract [en]

Changes in the ground surface temperature, as it can occur in built-up areas or due to climate change, affect the temperatures of geothermal boreholes. Analytical models for the thermal simulation of boreholes and consid-ering this factor have been proposed. However, they all impose a uniform heat extraction boundary condition along the borehole walls. This boundary condition overestimates the temperature change in the underground caused by the borehole heat extraction and underestimates it in case of rejection. More accurate results are most often obtained by imposing a uniform temperature boundary condition.In this paper, we propose a new model to calculate the boreholes wall temperature taking into account both the heat extractions/rejections from all the boreholes in the area and the change in ground surface temperature. The model is tailored for areas with independent ground source heat pumps and imposes a uniform temperature boundary condition along the borehole walls, overcoming the limitation of the existing models.We apply the new model to a real Swedish neighbourhood and show that existing systems may already be significantly affected by the increased ground surface temperature due to urbanization. We also compare our new model with an existing similar model and show that while the two models provide similar results for smaller areas, their difference tends to be relevant for bigger areas - including the real Swedish neighbourhood analysed -thus making the application of our model important for neighbourhood-and city-scale studies.

Place, publisher, year, edition, pages
Elsevier BV, 2023
Keywords
Ground-source heat pumps, Geothermal boreholes, Thermal interference, Effect of the ground surface, Analytical modelling
National Category
Building Technologies Energy Engineering
Identifiers
urn:nbn:se:kth:diva-323416 (URN)10.1016/j.renene.2022.12.023 (DOI)000905157000006 ()2-s2.0-85144377238 (Scopus ID)
Note

QC 20230307

Available from: 2023-02-01 Created: 2023-02-01 Last updated: 2023-09-15Bibliographically approved
Fasci, M. L., Lazzarotto, A., Acuña, J. & Claesson, J. (2021). Simulation of thermal influence between independent geothermal boreholes in densely populated areas. Applied Thermal Engineering, 196, Article ID 117241.
Open this publication in new window or tab >>Simulation of thermal influence between independent geothermal boreholes in densely populated areas
2021 (English)In: Applied Thermal Engineering, ISSN 1359-4311, E-ISSN 1873-5606, Vol. 196, article id 117241Article in journal (Refereed) Published
Abstract [en]

Ground Source Heat Pumps (GSHPs) connected to Borehole Heat Exchangers (BHEs) are a fast-growing technology for thermally efficient buildings. Therefore, areas with several independent GSHP installations close to each other are becoming more and more common. To guarantee an optimal operation of these systems, it is necessary to design them considering the influence of the neighbouring installations. However, a tailored model for this scope has not been found in the literature. In this paper, we aim at filling this gap by proposing and validating a methodology to calculate the thermal influence between neighbouring independent boreholes. It is based on the Finite Line Source (FLS) model and prescribes novel boundary conditions, tailored to hydraulically independent boreholes. The methodology allows to prescribe different thermal loads to different BHEs and imposes uniform temperature boundary condition on each borehole wall. We also show how to implement and apply the model. Our application shows a thermal influence of up to 1.5 K during the lifetime of a GSHP and of up to 0.8 K during the first year of operation in an area with a relatively low number of installations, underlying the importance of considering the thermal influence and the usefulness of our proposed model. Finally, a sensitivity study on the ground thermal conductivity shows the importance of a correct estimation of this property for accurate simulation results.

Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD, 2021
Keywords
Boreholes, Geothermal, Ground heat exchangers, Thermal influence, Neighbouring ground source heat pumps, Analytical modelling
National Category
Energy Engineering
Identifiers
urn:nbn:se:kth:diva-300821 (URN)10.1016/j.applthermaleng.2021.117241 (DOI)000686757000005 ()2-s2.0-85109768739 (Scopus ID)
Note

QC 20210929

Available from: 2021-09-29 Created: 2021-09-29 Last updated: 2023-09-15Bibliographically approved
Havtun, H., Bohdanowicz, P. & Claesson, J. (2021). Sustainable Energy Utilization. Stockholm: KTH Energiteknik
Open this publication in new window or tab >>Sustainable Energy Utilization
2021 (English)Book (Other academic)
Place, publisher, year, edition, pages
Stockholm: KTH Energiteknik, 2021. p. 596
National Category
Energy Engineering Building Technologies
Research subject
Energy Technology; Civil and Architectural Engineering, Building Service and Energy Systems; Civil and Architectural Engineering, Fluid and Climate Theory
Identifiers
urn:nbn:se:kth:diva-303999 (URN)9789174154054 (ISBN)
Note

QC 20211117

Available from: 2021-10-25 Created: 2021-10-25 Last updated: 2022-06-25Bibliographically approved
Claesson, J. (2021). Thermal Comfort and Indoor Climate (6ed.). Stockholm: KTH Energiteknik
Open this publication in new window or tab >>Thermal Comfort and Indoor Climate
2021 (English)Book (Other academic)
Place, publisher, year, edition, pages
Stockholm: KTH Energiteknik, 2021. p. 254 Edition: 6
National Category
Energy Engineering Building Technologies
Research subject
Energy Technology; Civil and Architectural Engineering, Building Service and Energy Systems; Civil and Architectural Engineering, Fluid and Climate Theory
Identifiers
urn:nbn:se:kth:diva-303998 (URN)
Note

QC 20211117

Not duplicate with diva 1605639 and diva 1605623 and diva 1605596 diva 1605627 and diva 1605635 and diva 1605600

Available from: 2021-10-25 Created: 2021-10-25 Last updated: 2022-06-25Bibliographically approved
Claesson, J. (2020). Thermal Comfort and Indoor Climate (5ed.). Stockholm: KTH Energiteknik
Open this publication in new window or tab >>Thermal Comfort and Indoor Climate
2020 (English)Book (Other academic)
Place, publisher, year, edition, pages
Stockholm: KTH Energiteknik, 2020. p. 216 Edition: 5
National Category
Energy Engineering Building Technologies
Research subject
Energy Technology; Civil and Architectural Engineering, Building Service and Energy Systems; Civil and Architectural Engineering, Fluid and Climate Theory
Identifiers
urn:nbn:se:kth:diva-303996 (URN)
Note

QC 20211117

Not duplicate with diva 1605639 and diva 1605623 and diva 1605596 diva 1605627 and diva 1605635 and diva 1605600

Available from: 2021-10-25 Created: 2021-10-25 Last updated: 2022-06-25Bibliographically approved
Fasci, M. L., Lazzarotto, A., Acuña, J. & Claesson, J. (2019). Analysis of the thermal interference between ground source heat pump systems in dense neighborhoods. Science and Technology for the Built Environment, 25(8), 1069-1080
Open this publication in new window or tab >>Analysis of the thermal interference between ground source heat pump systems in dense neighborhoods
2019 (English)In: Science and Technology for the Built Environment, ISSN 2374-4731, E-ISSN 2374-474X, Vol. 25, no 8, p. 1069-1080Article in journal (Refereed) Published
Abstract [en]

Ground source heat pumps (GSHPs) are a state-of-the-art technology for heating, cooling, and hot water production. They are already common in several countries and represent a promising technology for others. As the technology penetrates the market, the number of ground heat exchangers in densely populated areas may increase significantly. Therefore, it becomes important to consider the thermal influence of neighboring GSHPs while designing these systems in such areas. This question has become more frequent in some Swedish residential areas where the use of GSHPs is very common. This article proposes an easy-to-implement methodology to evaluate the thermal influence between borehole heat exchangers (BHEs) in areas with a high number of GSHPs installed. It also suggests two mitigation strategies to decrease the thermal interference so that the given limit for the ground temperature change is respected. The methodologies proposed are implemented using the programming language Julia and applied to fictional scenarios relevant for Sweden. It is found that neglecting the presence of neighboring systems might lead to an overexploitation of the underground heat. This can be avoided if, during the design phase, the presence of neighboring BHEs is taken into account and mitigation strategies are applied.

Place, publisher, year, edition, pages
Informa UK Limited, 2019
National Category
Energy Engineering
Identifiers
urn:nbn:se:kth:diva-303303 (URN)10.1080/23744731.2019.1648130 (DOI)000483153000001 ()2-s2.0-85071044601 (Scopus ID)
Note

QC 20211013

Available from: 2021-10-13 Created: 2021-10-13 Last updated: 2023-09-15Bibliographically approved
Claesson, J. (2019). Thermal Comfort and Indoor Climate (4ed.). Stockholm: KTH Energiteknik
Open this publication in new window or tab >>Thermal Comfort and Indoor Climate
2019 (English)Book (Other academic)
Place, publisher, year, edition, pages
Stockholm: KTH Energiteknik, 2019. p. 176 Edition: 4
National Category
Energy Engineering Building Technologies
Research subject
Energy Technology; Civil and Architectural Engineering, Building Service and Energy Systems; Civil and Architectural Engineering, Fluid and Climate Theory
Identifiers
urn:nbn:se:kth:diva-303994 (URN)
Note

QC 20211117

Not duplicate with diva 1605639 and diva 1605623 and diva 1605596 diva 1605627 and diva 1605635 and diva 1605600

Available from: 2021-10-25 Created: 2021-10-25 Last updated: 2022-06-25Bibliographically approved
Fasci, M. L., Lazzarotto, A., Acuña, J. & Claesson, J. (2018). Shallow Geothermal Heat Pumps: a study of the resource potential at a neighbourhood scale.. In: : . Paper presented at ICNTSE 2018.
Open this publication in new window or tab >>Shallow Geothermal Heat Pumps: a study of the resource potential at a neighbourhood scale.
2018 (English)Conference paper, Published paper (Refereed)
Abstract [en]

The residential sector accounts for a relevant share of global energy use; therefore it is important to use as much renewable energy as possible to satisfy its demand. Geothermal energy, among others, is nowadays used for this scope: more and more buildings in several countries are exploiting the underground to satisfy domestic heating, cooling and hot water demand by means of ground-source heat pumps. On the long run heat extraction/injection can lead to depletion of the ground as heat source/sink. Current tools only allow a designer to take into account the depletion of the ground caused by the system she or he is designing. However, the actual total heat depletion is also influenced by the surrounding systems. With the growing diffusion of ground-source heat pumps the ability of estimating the total underground heat depletion is of paramount importance. The aim of the article is to give an insight of the problem: the goal is to show what will happen in the underground if residential ground source heat pump systems are designed without taking into account the presence of neighbouring installations. The study is performed for different types of soil and borehole heat exchangers designs.

Keywords
Ground source heat pumps, thermal influence, neighbouring boreholes, geothermal sustainability
National Category
Energy Engineering
Research subject
Energy Technology
Identifiers
urn:nbn:se:kth:diva-246395 (URN)
Conference
ICNTSE 2018
Note

QCR 20190402

Available from: 2019-03-19 Created: 2019-03-19 Last updated: 2024-03-18Bibliographically approved
Claesson, J. (2018). Thermal Comfort and Indoor Climate (3ed.). Stockholm: KTH Energiteknik
Open this publication in new window or tab >>Thermal Comfort and Indoor Climate
2018 (English)Book (Other academic)
Place, publisher, year, edition, pages
Stockholm: KTH Energiteknik, 2018. p. 150 Edition: 3
National Category
Energy Engineering Building Technologies
Research subject
Energy Technology; Civil and Architectural Engineering, Building Service and Energy Systems; Civil and Architectural Engineering, Fluid and Climate Theory
Identifiers
urn:nbn:se:kth:diva-303991 (URN)
Note

QC 20211117

Not duplicate with diva 1605639 and diva 1605623 and diva 1605596 diva 1605627 and diva 1605635 and diva 1605600

Available from: 2021-10-25 Created: 2021-10-25 Last updated: 2022-06-25Bibliographically approved
Claesson, J. (2017). Thermal Comfort and Indoor Climate (2ed.). Stockholm: KTH Energiteknik
Open this publication in new window or tab >>Thermal Comfort and Indoor Climate
2017 (English)Book (Other academic)
Place, publisher, year, edition, pages
Stockholm: KTH Energiteknik, 2017. p. 137 Edition: 2
National Category
Energy Engineering Building Technologies
Research subject
Energy Technology; Civil and Architectural Engineering, Building Service and Energy Systems; Civil and Architectural Engineering, Fluid and Climate Theory
Identifiers
urn:nbn:se:kth:diva-303990 (URN)
Note

QC 20211117

Not duplicate with diva 1605639 and diva 1605623 and diva 1605596 diva 1605627 and diva 1605635 and diva 1605600

Available from: 2021-10-25 Created: 2021-10-25 Last updated: 2022-06-25Bibliographically approved
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ORCID iD: ORCID iD iconorcid.org/0000-0003-3896-2443

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