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Comfort and Economic Viability of Personal Ceiling Fans Assisted by Night Ventilation in a Renovated Office Building

Knudsen, Mattis 1; Rissetto, Romina ORCID iD icon 2; Carbonare, Nicolas ORCID iD icon 2; Wagner, Andreas ORCID iD icon 2; Schweiker, Marcel
1 Karlsruher Institut für Technologie (KIT)
2 Institut Entwerfen und Bautechnik (IEB), Karlsruher Institut für Technologie (KIT)


An expected increase in the use of air conditioning by 2050 will significantly increase electricity demand and come at a cost to the environment. Implementing passive cooling strategies and focusing on personal environmental control systems (PECSs) could help to address this issue. While numerous studies have investigated the positive impact of PECSs on thermal comfort and energy savings, their overall economic benefit has been poorly addressed. We present an economic evaluation of personal fans for an office building in Germany. Building performance simulation was used to compare passive and active cooling concepts, and sensitivity analysis was performed for different climate scenarios. A cost-benefit analysis was carried out, including an assessment of investment and operating costs and the monetary value of relative performance. The transferability of comfort and productivity into costs is the novelty of this paper. The results showed that by supplementing night ventilation with personal fans, discomfort hours could be reduced by up to 50%. However, the initial investment of the fan is not compensated by savings in productivity losses compared to night ventilation alone. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000156989
Veröffentlicht am 16.03.2023
DOI: 10.3390/buildings13030589
Zitationen: 3
Web of Science
Zitationen: 3
Zitationen: 3
Cover der Publikation
Zugehörige Institution(en) am KIT Institut Entwerfen und Bautechnik (IEB)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 2075-5309
KITopen-ID: 1000156989
Erschienen in Buildings
Verlag MDPI
Band 13
Heft 3
Seiten Art.-Nr.: 589
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 23.02.2023
Schlagwörter personal environmental comfort system; cost-benefit analysis; energy efficiency; thermal comfort; passive cooling; night ventilation; productivity loss; sensitivity analysis; building simulation; building monitoring
Nachgewiesen in Scopus
Web of Science
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