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A holistic performance evaluation of ventilation radiators – An assessment according to EN 442-2 using numerical simulations
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering. (Strömnings- och klimatteknik)
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering. (Strömnings- och klimatteknik)ORCID iD: 0000-0001-6266-8485
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering. (Strömnings- och klimatteknik)ORCID iD: 0000-0002-9361-1796
2019 (English)In: Journal of Building Engineering, E-ISSN 2352-7102, Vol. 25, article id 100818Article in journal (Refereed) Published
Abstract [en]

This research explored the importance of airflow rate and convector plate design on the operational performance of heating radiators equipped with an air device (ventilation radiators). The radiator was analyzed according to European Norm EN 442-2 using numerical simulations. The largest benefit of using staggered convector plates was the more efficient preheating of the incoming outdoor air supply. With this plate design, the evaluated radiator increased the temperature of the incoming airflow of 10 l/s from -5 °C to 26 °C with water supply/return temperatures of 45 °C/35 °C. With these water temperatures, the radiator was able to cover a room heat loss of 34 W/m2 floor area. However, the design of the convector plate alone was found to have a limited impact on the heat output from the radiator. Neither did the plate design significantly affect the uniformity of heat distribution nor the vertical temperature stratification inside the room. The results also showed that ventilation radiators might cover a building heating load (kW) with a lower supply water temperature but not necessarily give a lower annual energy use (kWh) for the space heating of a building.

Place, publisher, year, edition, pages
I: Elsevier, 2019. Vol. 25, article id 100818
Keywords [en]
Radiator, Low-temperature heating, Ventilation, Heat transfer, Staggered channels, Energy
National Category
Energy Engineering
Research subject
Energy Technology; Energy Technology; Civil and Architectural Engineering
Identifiers
URN: urn:nbn:se:kth:diva-258927DOI: 10.1016/j.jobe.2019.100818ISI: 000477702200050Scopus ID: 2-s2.0-85067571725OAI: oai:DiVA.org:kth-258927DiVA, id: diva2:1350385
Funder
Svenska Byggbranschens Utvecklingsfond (SBUF), 13122
Note

QC 20190913

Available from: 2019-09-11 Created: 2019-09-11 Last updated: 2019-09-13Bibliographically approved

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Wang, QianSadrizadeh, Sasan

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