Optimizing production efficiencies of hot water units using building energy simulations - Trade-off between Legionella pneumophila contamination risk and energy efficiency
The energy needed for domestic hot water represents an important share in the total energy use of well-insulated and airtight buildings. One of the main reasons for this high energy demand is that hot water is produced at temperatures above 60°C to mitigate the risk of contaminating the hot water sy...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2019-01-01
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| Series: | E3S Web of Conferences |
| Online Access: | https://www.e3s-conferences.org/articles/e3sconf/pdf/2019/37/e3sconf_clima2019_04053.pdf |
| _version_ | 1818946186046865408 |
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| author | Van Kenhove Elisa De Backer Lien Laverge Jelle |
| author_facet | Van Kenhove Elisa De Backer Lien Laverge Jelle |
| author_sort | Van Kenhove Elisa |
| collection | DOAJ |
| description | The energy needed for domestic hot water represents an important share in the total energy use of well-insulated and airtight buildings. One of the main reasons for this high energy demand is that hot water is produced at temperatures above 60°C to mitigate the risk of contaminating the hot water system with Legionella pneumophila. However, this elevated temperature is not necessary for most domestic hot water applications, and has a negative effect on the efficiency of hot water production units. A simulation model has been developed which proposes an alternative to this constant 60°C by predicting the Legionella pneumophila concentration dynamically throughout the hot water system. Based on this knowledge, a hot water controller is added to the simulation model that sets a lower hot water comfort temperature in combination with heat shocks. In this paper, the simulation model is used to estimate the energy saving potential in a case study building, at the level of the heat production system by reaching higher production efficiencies. Three different production units, namely an electric boiler, heat pump and solar collector have been investigated. The controller is expected to become an alternative for the current, energy intensive, high temperature tap water heating systems. |
| first_indexed | 2024-12-20T08:11:00Z |
| format | Article |
| id | doaj.art-83569406f9cd4e63bb982d55c52507f9 |
| institution | Directory Open Access Journal |
| issn | 2267-1242 |
| language | English |
| last_indexed | 2024-12-20T08:11:00Z |
| publishDate | 2019-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | E3S Web of Conferences |
| spelling | doaj.art-83569406f9cd4e63bb982d55c52507f92022-12-21T19:47:16ZengEDP SciencesE3S Web of Conferences2267-12422019-01-011110405310.1051/e3sconf/201911104053e3sconf_clima2019_04053Optimizing production efficiencies of hot water units using building energy simulations - Trade-off between Legionella pneumophila contamination risk and energy efficiencyVan Kenhove Elisa0De Backer Lien1Laverge Jelle2Research group of Building Physics, Ghent University,Research group of Building Physics, Ghent University,Research group of Building Physics, Ghent University,The energy needed for domestic hot water represents an important share in the total energy use of well-insulated and airtight buildings. One of the main reasons for this high energy demand is that hot water is produced at temperatures above 60°C to mitigate the risk of contaminating the hot water system with Legionella pneumophila. However, this elevated temperature is not necessary for most domestic hot water applications, and has a negative effect on the efficiency of hot water production units. A simulation model has been developed which proposes an alternative to this constant 60°C by predicting the Legionella pneumophila concentration dynamically throughout the hot water system. Based on this knowledge, a hot water controller is added to the simulation model that sets a lower hot water comfort temperature in combination with heat shocks. In this paper, the simulation model is used to estimate the energy saving potential in a case study building, at the level of the heat production system by reaching higher production efficiencies. Three different production units, namely an electric boiler, heat pump and solar collector have been investigated. The controller is expected to become an alternative for the current, energy intensive, high temperature tap water heating systems.https://www.e3s-conferences.org/articles/e3sconf/pdf/2019/37/e3sconf_clima2019_04053.pdf |
| spellingShingle | Van Kenhove Elisa De Backer Lien Laverge Jelle Optimizing production efficiencies of hot water units using building energy simulations - Trade-off between Legionella pneumophila contamination risk and energy efficiency E3S Web of Conferences |
| title | Optimizing production efficiencies of hot water units using building energy simulations - Trade-off between Legionella pneumophila contamination risk and energy efficiency |
| title_full | Optimizing production efficiencies of hot water units using building energy simulations - Trade-off between Legionella pneumophila contamination risk and energy efficiency |
| title_fullStr | Optimizing production efficiencies of hot water units using building energy simulations - Trade-off between Legionella pneumophila contamination risk and energy efficiency |
| title_full_unstemmed | Optimizing production efficiencies of hot water units using building energy simulations - Trade-off between Legionella pneumophila contamination risk and energy efficiency |
| title_short | Optimizing production efficiencies of hot water units using building energy simulations - Trade-off between Legionella pneumophila contamination risk and energy efficiency |
| title_sort | optimizing production efficiencies of hot water units using building energy simulations trade off between legionella pneumophila contamination risk and energy efficiency |
| url | https://www.e3s-conferences.org/articles/e3sconf/pdf/2019/37/e3sconf_clima2019_04053.pdf |
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