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Modelling of Floor Heating and Cooling in Residential Districts

Kirschstein, Xenia ; Reber, Joscha ; Zeus, Rouven ; Schuster, Miriam ; Bishara, Nadja (2023)
Modelling of Floor Heating and Cooling in Residential Districts.
In: Energies, 2023, 16 (15)
doi: 10.26083/tuprints-00024496
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Modelling of Floor Heating and Cooling in Residential Districts
Language: English
Date: 24 November 2023
Place of Publication: Darmstadt
Year of primary publication: 2023
Place of primary publication: Basel
Publisher: MDPI
Journal or Publication Title: Energies
Volume of the journal: 16
Issue Number: 15
Collation: 17 Seiten
DOI: 10.26083/tuprints-00024496
Corresponding Links:
Origin: Secondary publication DeepGreen

In this study, a method is proposed to expand the utilization of an existing calculation model for a floor heat exchanger (HX) from room scale to small district scale. The model, namely Trnsys Type 653, is typically employed for the simulation of single or simultaneously controlled parallel heating circuits. It uses a simplified approach to calculate the heat exchange between fluid and screed, taking the HX effectiveness as an input. In order to calculate the effectiveness based on the HX design, fluid properties and mass flow rate, a Python model is developed to be coupled with Type 653. The results are compared to a reference finite element model set up in COMSOL® and depend on the HX design. The highest deviations range from over 1 K for 35 min to over 2 K for 175 min, while the lowest deviations range from below 0.5 K to below 1 K. Furthermore, the simplification of the floor HX model is analyzed by summarizing heating circuits from single rooms to a whole flat and from single flats to a whole floor. This approach results in deviations of approximately 2 and 4%, respectively, in the overall transferred heat over longer periods of time, while the switch-on frequency of the controller in an exemplary day is halved. While further analysis is required, the described simplifications seem promising for detailed district simulations with relatively low computational effort.

Uncontrolled Keywords: floor heating, floor cooling, radiant floor, HX effectiveness, floor heat exchanger, district modelling, model simplification
Identification Number: 5850
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-244964
Additional Information:

This article belongs to the Section G: Energy and Buildings

Classification DDC: 600 Technology, medicine, applied sciences > 624 Civil engineering and environmental protection engineering
Divisions: 13 Department of Civil and Environmental Engineering Sciences > Institute of Geotechnics
13 Department of Civil and Environmental Engineering Sciences > Institute für Structural Mechanics and Design
Date Deposited: 24 Nov 2023 13:18
Last Modified: 04 Jan 2024 07:03
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/24496
PPN: 514429038
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