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A novel concept to measure envelope thermal transmittance and air infiltration using a combined simulation and experimental approach

Li, Yu and Rezgui, Yacine 2017. A novel concept to measure envelope thermal transmittance and air infiltration using a combined simulation and experimental approach. Energy and Buildings 140 , pp. 380-387. 10.1016/j.enbuild.2017.02.036
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This paper presents a novel method to determine building envelope thermal transmittance (known as U-values) and air infiltration rate by a combination of Energy modeling (DesignBuilder and EnergyPlus), regression models and genetic algorithm at quasi-steady state conditions. DesignBuilder is used to develop the thermal model of an office building, including physical building models, materials specification, occupancy schedules, detailed HVAC system and components for energy simulation purposes. Specifically, the simulation was carried out in EnergyPlus at diverse U-values and air infiltration rates to produce a large datasets. Subsequently, the results were used to generate a linear regression model to evaluate the associations of thermal demands with U-values and air infiltration rate. Genetic algorithm was then applied to obtain a set of U-values and air infiltration rate with the minimum difference between field measurement and model prediction. The calibrated U-values and air infiltration rate were employed as inputs in EnergyPlus to model one workday heat consumption. When compared with thermal demand from measured data, the accuracy of the calibrated model improved significantly.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Uncontrolled Keywords: U-values; air infiltration rate; energy modeling; regression models; genetic algorithm
Publisher: Elsevier
ISSN: 0378-7788
Last Modified: 04 Jun 2017 22:52

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