NDLI: Improving building fabric energy efficiency in hot-humid climates using dynamic insulation

Content Provider	Springer Nature Link
Author	Elsarrag, Esam Al Horr, Yousef Imbabi, Mohammed Salah Eldin
Copyright Year	2012
Abstract	New effective technologies and materials that have the potential to reduce energy demand with excellent energy efficiency and low environmental impact are urgently required in the Gulf Region. Dynamic insulation, which functions by recycling fabric heat loss back to the building, has been established theoretically and proven in pilot projects. It sets the green, low carbon benchmark for thermal insulation in buildings. This paper presents details of the Eco-Villa, its construction, how the performance of the villa was monitored, and the findings from the initial monitoring phase and the dynamic simulation model (DSM). The villa was tested in two modes, bypass (static) and dynamic. The static U value of the external envelop wall was estimated at 0.24 W/(m$^{2}$·K) in bypass mode. The theoretical dynamic U value changed from 0.24 to 0.05 W/(m$^{2}$·K) when the ventilation airflow was varied from 0 to 0.001 m$^{3}$/(s·m$^{2}$) (0 to 1 L/(s·m$^{2}$)), with a further small reduction occurring when the flow rate increased beyond 0.001 m$^{3}$/(s·m$^{2}$) (1 L/(s·m$^{2}$)). The design ventilation rate for the Eco-Villa was 0.0008 m$^{3}$/(s·m$^{2}$) (0.8 L/(s·m$^{2}$)), which yielded a theoretical dynamic U value of 0.063 W/(m$^{2}$·K) compared to a measured U value of 0.125 W/(m$^{2}$·K). The reduction in the fabric conduction gain was found to be 41% whereas the estimate from the DSM was 38%. The results demonstrate the fabric energy efficiency improvements that can be achieved through the use of dynamic insulation.
Starting Page	127
Ending Page	134
Page Count	8
File Format	PDF
ISSN	19963599
Journal	Building Simulation
Volume Number	5
Issue Number	2
e-ISSN	19968744
Language	English
Publisher	Tsinghua Press
Publisher Date	2012-05-09
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	air quality HVAC energy efficiency humid climates dynamic insulation ventilated facade Environmental Monitoring/Analysis Atmospheric Protection/Air Quality Control/Air Pollution Building Construction Engineering Thermodynamics, Heat and Mass Transfer
Content Type	Text
Resource Type	Article
Subject	Building and Construction Energy

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