Reference : Untersuchung des thermischen Komforts und der Luftqualität an vier neuen energieeffiz...

	Document type :	Scientific journals : Article
	Discipline(s) :	Engineering, computing & technology : Energy
	Focus Areas :	Sustainable Development
	To cite this reference:	http://hdl.handle.net/10993/30224

Title :	Untersuchung des thermischen Komforts und der Luftqualität an vier neuen energieeffizienten Luxemburger Schulen mit und ohne Lüftungsanlagen
Language :	German
Translated title :	[en] Examination of thermal comfort and air quality in four new energy efficient schools in Luxembourg with and without mechanical ventilation
Author, co-author :	Maas, Stefan [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
	Brensing, Jessica [University of Luxembourg > Faculty of Language and Literature, Humanities, Arts and Education (FLSHASE) > Integrative Research Unit: Social and Individual Development (INSIDE) >]
	Flies, Max []
	Steffgen, Georges [University of Luxembourg > Faculty of Language and Literature, Humanities, Arts and Education (FLSHASE) > Integrative Research Unit: Social and Individual Development (INSIDE) >]
Publication date :	Feb-2017
Journal title :	Bauphysik
Publisher :	Ernst & Sohn
Volume :	39. Jahrgang
Pages :	49-56
Peer reviewed :	Yes (verified by ORBilu)
Audience :	International
ISSN :	0171-5445
e-ISSN :	1437-0980
City :	Berlin
Country :	Germany
Keywords :	[de] Raumklimakomfort ; Nutzerzufriedenheit ; mechanische versus freie Belüftung in energieeffizienten neuen Schulen
Abstract :	[en] A study was conducted in four new energy efficient schools in Luxembourg with excellent primary energy consumption values, where the indoor thermal comfort and the air quality was assessed by technical measurements and by surveys. Two schools were equipped with mechanical ventilation with heat recovery and two were without, i.e. ventilation there was manually controlled by opening the windows. Further to the C02-concentration as indicator for the air quality all other important comfort parameters were measured, why the well-known indicators according to FANGER could be calculated, i.e. the „Predicted Mean Vote (PMV)“ and the „Predicted Percentage of Dissatisfied (PPD)“. The individual perceived indoor comfort was analyzed by standardized questionnaires for a period of four weeks. One aim of the study was to compare natural ventilation by opening and closing the windows with the mechanical ventilation in all named aspects. In total there was a good agreement between the measurements and the survey. The results show that in general mechanical ventilation in schools lead to better physical measured values and to better subjective perception of the users. However those buildings suffer from a very low relative humidity, though it is rarely sensed by the occupants. Furthermore, in one of the mechanically ventilated buildings the air velocity was very high and led to draft-perception. The detected air temperature was heterogeneous and independent of the ventilation concept, leading to an individual judgement of PMV for the different buildings. Users should always have the possibility of interaction and control to adjust the indoor climate according to their individual needs and to correct smaller technical shortcomings.
Research centres :	FSTC
Funders :	University of Luxembourg - UL ; Fonds National de la Recherche - FnR ; Adminsitration des Bâtiments Publics Luxembourg
Permalink :	http://hdl.handle.net/10993/30224
DOI :	10.1002/bapi.201710004

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