Falk, Paul Michael ; Dammel, Frank ; Stephan, Peter (2017)
Exergy analyses of heat supply systems for a building cluster with CARNOT.
In: International Journal of Thermodynamics, 20
doi: 10.5541/eoguijt.299926
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
In this paper, a model to simulate community heating systems is presented and energy and exergy analyses are conducted for a district heating system with three different heat generation alternatives. The alternatives are a gas boiler system, a system assisted by solar thermal collectors with a seasonal thermal energy storage and a gas boiler as backup, and a system with geothermal borehole heat exchangers combined with a heat pump. The heat supply of a building cluster of 11 buildings is dynamically modeled using the MATLAB/Simulink based toolbox CARNOT. The aim is to match the low exergy heating demand with a low exergy heat source. To cover an energy demand of 263.7 MWh/a, the geothermal system needs 174.0 MWh/a of exergy, the solar thermal system 269.2 MWh/a of exergy and the gas boiler system 324.9 MWh/a. A parameter study of the solar thermal system shows better results for lower supply temperatures and a lower heat loss coefficient k, but the results depend strongly on the chosen storage size. It was found that the use of fossil fuel could be reduced by 43.8% for the geothermal system and by 17.6 % for the solar thermal system compared to the gas boiler system.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2017 |
| Autor(en): | Falk, Paul Michael ; Dammel, Frank ; Stephan, Peter |
| Art des Eintrags: | Bibliographie |
| Titel: | Exergy analyses of heat supply systems for a building cluster with CARNOT |
| Sprache: | Englisch |
| Publikationsjahr: | 2017 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | International Journal of Thermodynamics |
| Jahrgang/Volume einer Zeitschrift: | 20 |
| DOI: | 10.5541/eoguijt.299926 |
| URL / URN: | http://dergipark.gov.tr/download/issue-file/7011 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | In this paper, a model to simulate community heating systems is presented and energy and exergy analyses are conducted for a district heating system with three different heat generation alternatives. The alternatives are a gas boiler system, a system assisted by solar thermal collectors with a seasonal thermal energy storage and a gas boiler as backup, and a system with geothermal borehole heat exchangers combined with a heat pump. The heat supply of a building cluster of 11 buildings is dynamically modeled using the MATLAB/Simulink based toolbox CARNOT. The aim is to match the low exergy heating demand with a low exergy heat source. To cover an energy demand of 263.7 MWh/a, the geothermal system needs 174.0 MWh/a of exergy, the solar thermal system 269.2 MWh/a of exergy and the gas boiler system 324.9 MWh/a. A parameter study of the solar thermal system shows better results for lower supply temperatures and a lower heat loss coefficient k, but the results depend strongly on the chosen storage size. It was found that the use of fossil fuel could be reduced by 43.8% for the geothermal system and by 17.6 % for the solar thermal system compared to the gas boiler system. |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Fachgebiet für Technische Thermodynamik (TTD) Exzellenzinitiative Exzellenzinitiative > Graduiertenschulen Exzellenzinitiative > Graduiertenschulen > Graduate School of Energy Science and Engineering (ESE) |
| Hinterlegungsdatum: | 13 Feb 2018 16:32 |
| Letzte Änderung: | 05 Aug 2019 11:36 |
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