Paper Conference

Proceedings of Building Simulation 2017: 15th Conference of IBPSA


Parametric Study of Window Attachment Impacts on Building Heating/Cooling Energy Consumption

Jinqing Peng, Jacob Jonsson, Robert Hart, Dragan C. Curcija, Stephen E. Selkowitz
Building Technology and Urban Systems Division, Lawrence Berkeley National Laboratory, 1Cyclotron Road, Berkeley, CA 94720, USA *Corresponding author: Tel.: +1(510) 495 2602
Fax: +1(510) 486 4089
Email (Dragan C. Curcija)

Abstract: We present a parametric study of window attachment effects on building heating/cooling energy consumption. Commonly used operable window attachment types such as venetian blinds, roller shades, and cellular shades, in addition to fixed panels and solar screens, are investigated. Nine window attachment energy performance related parameters are chosen and varied, resulting in a total of 9072 combinations for each window attachment type and climate zone for the parametric study. The optical and thermal properties of each window and attachment combination are calculated in Berkeley Lab WINDOW program before being exported to EnergyPlus utilizing the bi-directional scattering distribution function (BSDF) fenestration model. The annual cooling and heating energy use of each window and attachment combination are simulated in EnergyPlus with a two-story residential building, based on the Department of Energy (DOE) typical residential building model and 1998 International Energy Conservation Code (IECC) vintage. New annual energy performance (AEP) indices are being developed for energy rating of window attachments. Here they are used as a metric for exploring the effect of attachment parameters on building heating/cooling energy use. Based on sensitivity analysis results, key parameters by window attachment type that have significant impacts on building heating/cooling energy use in coolingdominated, heating-dominated and mixed climate are identified. The compound sensitivity in calculated AEP values caused by measurement uncertainties of input parameters are also calculated to help guide the window Attachment Energy Rating Council (AERC) in the determination of required measurement precision when rating the AEP of window attachments.
Pages: 2609 - 2617