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Mapping Relevant Parameters for Efficient Operation of Low-Temperature Heating Systems in Nordic Single-Family Dwellings
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Fluid and Climate Technology. Bravida Holding AB, Mikrofonvagen 28, S-12637 Hagersten, Sweden..ORCID iD: 0000-0001-5902-2886
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Fluid and Climate Technology. Uponor AB, Hackstavagen 1, S-72132 Vasteras, Sweden..ORCID iD: 0000-0001-6266-8485
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Fluid and Climate Technology. Univ Calif Berkeley, Dept Architecture, Ctr Built Environm, Berkeley, CA 94720 USA..ORCID iD: 0000-0002-9361-1796
2018 (English)In: Applied Sciences, E-ISSN 2076-3417, Vol. 8, no 10, article id 1973Article in journal (Refereed) Published
Abstract [en]

The aim of this study was to map the parameters that have the greatest impact on the environmental impact of heating systems usually used in Nordic single-family dwellings. The study focused on mapping the technical requirements for efficient operation of heating systems in a broader context. The results suggest that the ability of a heating system to be operated with a low-temperature water supply depends to a large extent on the heating demand of a building. It was shown that an increase in the water flow rate in hydronic circuits would significantly increase the thermal efficiency from analyzed heating systems. This increase would not increase the pumping power need, nor would it create noise problems in distribution network if the distribution pipes and thermostatic valves were properly selected. However, this increase in water flow rate improved the efficiency of considered closed-loop heat pump. It was further shown that the efficiency of the heat pump could be additionally improved by halving the energy needs for the domestic hot-water and circulators. The main conclusion from this study is that exergy usage, CO2 emission and thereby environmental impact are significantly lower for heating systems that are operated with small temperature drops.

Place, publisher, year, edition, pages
MDPI, 2018. Vol. 8, no 10, article id 1973
Keywords [en]
low-temperature heating, energy efficiency, CO2 emissions, heat pump, hydraulic losses, system analysis
National Category
Medical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-239111DOI: 10.3390/app8101973ISI: 000448653700268Scopus ID: 2-s2.0-85055107835OAI: oai:DiVA.org:kth-239111DiVA, id: diva2:1264550
Note

QC 20181120

Available from: 2018-11-20 Created: 2018-11-20 Last updated: 2019-08-20Bibliographically approved

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Ploskic, AdnanWang, QianSadrizadeh, Sasan

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