Design considerations with ventilation-radiators: Comparisons to traditional two-panel radiators
2009 (English)In: Energy and Buildings, ISSN 0378-7788, Vol. 41, no 1, 92-100 p.Article in journal (Refereed) Published
Performance of heat emitters in a room is affected by their interaction with the ventilation system. A radiator gives more heat output with increased air flow along its heat transferring surface, and with increased thermal difference to surrounding air. Radiator heat output and comfort temperatures in a small one-person office were Studied using different positions for the ventilation air inlet. In two of the four test cases the air inlet was placed between radiator panels to form ventilation-radiator systems. Investigations were made by CFD (Computational Fluid Dynamics) simulations, and included visualisation of thermal comfort conditions, as well as radiator heat output comparisons. The room model was exhaust-ventilated, with an air exchange rate equal to what is recommended for Swedish offices (71 s(-1) per person) and cold infiltration air (-5 degrees C) typical of a winter day in Stockholm. Results showed that under these conditions ventilation-radiators were able to create a more stable thermal climate than the traditional radiator ventilation arrangements. In addition, when using ventilation-radiators the desired thermal climate could be achieved with a radiator surface temperature as Much as 7.8 degrees C lower. It was concluded that in exhaust-ventilated office rooms, ventilation-radiators can provide energy and environmental savings.
Place, publisher, year, edition, pages
2009. Vol. 41, no 1, 92-100 p.
Ventilation-radiator, Exhaust ventilation, CFD simulation, Thermal, comfort, Energy consumption, Low temperature heating
IdentifiersURN: urn:nbn:se:kth:diva-18031DOI: 10.1016/j.enbuild.2008.07.014ISI: 000261483800011ScopusID: 2-s2.0-55649110025OAI: oai:DiVA.org:kth-18031DiVA: diva2:336076
QC 201005252010-08-052010-08-052013-04-30Bibliographically approved