Multi-criteria comparison of various drinking water installations for low-temperature supply systems in apartments

Abstract Rules to prevent from legionnaires disease gain importance as the building sector, esp. multi-family houses, needs to be decarbonized with temperature sensitive heat pumps. As legionella grow often in the peripheries of the pipe networks, we carried out dynamic simulations with TRNSYS of fo...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 2600; no. 2; pp. 22022 - 22027
Main Authors Pärisch, Peter, Distelhoff, Mark, Keuler, Jonas, Lampe, Carsten, Graf, Christopher, Cadenbach, Anna
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.11.2023
Subjects
Apartments
Boundary conditions
Cold water
Drinking water
Heat pumps
Hot water
Indicators
Low temperature
Multiple criterion
Physics
Water heaters
Water installations
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Summary:Abstract Rules to prevent from legionnaires disease gain importance as the building sector, esp. multi-family houses, needs to be decarbonized with temperature sensitive heat pumps. As legionella grow often in the peripheries of the pipe networks, we carried out dynamic simulations with TRNSYS of four different piping designs with composite pipes inside a reference apartment (T-piece, in-series, ring and a mix of T-piece for potable hot water (PWH) and ring for potable cold water (PWC)). We applied PWH and PWC tapping profiles for each tap, investigated two different supply temperatures of potable hot water 60 °C and 45 °C, and compared the results using hygienic, comfort and energy efficiency performance indicators. Based on the indicators and the boundary conditions used, classical T-piece and the mix installation show the best results, followed by series and ring, especially when using decentral water heaters with 45 °C.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2600/2/022022