bei Google ScholarTitelangaben
Jeßberger, Jaromir ; Heberle, Florian ; Brüggemann, Dieter:
Integration of high-temperature heat pumps into geothermal energy systems.
In:
10th Heat Powered Cycles 2023 : Conference Proceedings. -
Edinburgh
,
2023
. - S. 16-30
ISBN 978-1-912669-63-9
DOI: https://doi.org/10.5281/zenodo.10245218
Abstract
For a long time, the energy transition has been regarded as a pure electricity transition.However, due to the high share of the heating market in Europe ́s final energy consumption, itis mandatory to intensify the decarbonisation in this sector as well. High-temperature heatpumps (HTHP) could make a major contribution in different areas of application, like thesupply of existing heating networks or the utilisation of industrial waste heat. However, thereare still open research questions regarding the technical aspects like fluidselection or part loadbehaviour as well as economical aspects.With this motivation, the part load behaviour of a HTHP is investigated on the basis of aquasi-steady state simulation model, which is validated from experimental data of a test rigwith a thermal output of 30 kW. The simulation results are used for thermo-economic analysesof the integration of HTHPs in geothermal energy systems. In this context two potentialapplications are considered. On the one hand, the increase of the supply temperature of amedium-deep energy system for a district heating network is analysed. On the other hand, thepeak load coverage by means of HTHP in case of a deep geothermal heat plant is investigated.The first measurements show a coefficient of performance (COP) of 3.99 at the design point(DP) with a thermal output of 30 kW and a temperature lift of 37.4 K. The simulation model isbased on off-design correlations for the heat exchanger according to Toffolo et al. [1] and anextrapolated compressor characteristic curve. The COP shows a relative deviation comparedto the For a long time, the energy transition has been regarded as a pure electricity transition.However, due to the high share of the heating market in Europe ́s final energy consumption, itis mandatory to intensify the decarbonisation in this sector as well. High-temperature heatpumps (HTHP) could make a major contribution in different areas of application, like thesupply of existing heating networks or the utilisation of industrial waste heat. However, thereare still open research questions regarding the technical aspects like fluidselection or part loadbehaviour as well as economical aspects.With this motivation, the part load behaviour of a HTHP is investigated on the basis of aquasi-steady state simulation model, which is validated from experimental data of a test rigwith a thermal output of 30 kW. The simulation results are used for thermo-economic analysesof the integration of HTHPs in geothermal energy systems. In this context two potentialapplications are considered. On the one hand, the increase of the supply temperature of amedium-deep energy system for a district heating network is analysed. On the other hand, thepeak load coverage by means of HTHP in case of a deep geothermal heat plant is investigated.The first measurements show a coefficient of performance (COP) of 3.99 at the design point(DP) with a thermal output of 30 kW and a temperature lift of 37.4 K. The simulation model isbased on off-design correlations for the heat exchanger according to Toffolo et al. [1] and anextrapolated compressor characteristic curve. The COP shows a relative deviation comparedto the experiments below 5.8 % for the considered part load conditions and reproduces themeasurements qualitatively well. The thermo-economic analyses show that the integration ofHTHPs into the two systems mentioned is economical, taking into account the current subsidiesin Germany. Thus, in the peak load application the levelized costs of heat (LCOH) of gas canbe reduced in the basis scenario by 7.1 % and by 20.1 % in the medium-deep application.Extensive sensitivity analyses were carried out to make the influence of the various parameterson the economic viability clear.In further work, the submodels on component level will be further developed based on extendedmeasurement campaigns.
Weitere Angaben
| Publikationsform: | Aufsatz in einem Buch |
|---|---|
| Begutachteter Beitrag: | Ja |
| Institutionen der Universität: | Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Technische Thermodynamik und Transportprozesse Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Technische Thermodynamik und Transportprozesse > Lehrstuhl Technische Thermodynamik und Transportprozesse - Univ.-Prof. Dr.-Ing. Dieter Brüggemann Profilfelder > Emerging Fields > Energieforschung und Energietechnologie Forschungseinrichtungen > Forschungsstellen > Zentrum für Energietechnik - ZET |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften |
| Eingestellt am: | 07 Mai 2024 07:01 |
| Letzte Änderung: | 07 Mai 2024 07:01 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/89495 |