Fraunhofer Institute for Solar Energy Systems ISE| Duration: | 12/2018 - 03/2022 |
| Contracting Authority/ Sponsors: | Fraunhofer-Gesellschaft |
| Project Partners: | Lawrence Berkeley National Laboratory LBNL – Energy Technologies Area |
| Project Focus: |       |
ICON LBNL-Fraunhofer ISE – Models and Methods for Optical and Thermal Characterization of Building Envelopes
Bidirectional transmittance distribution function (BTDF) of a solar-shading fabric sample in measured high resolution for ϴin = 40°, ϕin = 90°. The direct-hemispherical transmittance for this input angle is 0.03.
Bidirectional transmittance distribution function (BTDF) of a solar-shading fabric sample in Klems format for ϴin = 40°, ϕin = 90° and direct-hemispherical transmittance for this input angle.
pgII goniophotometer with the new phirot2 sample holder, with holders for two different samples and an aperture for the reference beam. This goniophotometer is used to measure bidirectional scattering distribution functions (BSDF) of many materials used in building envelope components.
LBNL and Fraunhofer ISE collaborated within this ICON project to support the global construction industry by achieving the following goals:
- Development of a cloud-based, BIM-compatible, internationally recognized data base for architectural glazing, daylighting, solar-shading and active-solar (i.e. building-integrated PV and solar-thermal) components (WP2). All data formats, data files and access specifications will be “open”.
- Development of validated measurement and data-processing methods to determine the full range of solar-optical properties of advanced building-envelope products (WP4)
- Implementation of joint strategies for the population of the new database with manufacturer data sets certified by independent labs (WP3). This includes the establishment of Fraunhofer ISE as the European regional data aggregator (responsible for database input from Europe) for the new and existing international data bases.
- Development of accurate component and systems-level daylight and energy simulation programs for product labeling, design optimization and building planning that treat the optical and thermal characteristics of advanced building envelope components accurately and can interface via well-defined API or other semantic web-approaches with the new database for building envelope components (WP1)
- Development of simple but sufficiently accurate methods for the initial design phase and building permit application to represent the optical, thermal and energy-relevant properties of architectural glazing, solar-shading and active-solar products and integrated design solutions (WP5). These tools will also communicate with the new database via semantic web interfaces.
Within WP3, TestLab Solar Facades became the European Regional Data Aggregator (RDA) for the National Fenestration Rating Council NFRC in July 2020. European glazing manufacturers that wish to address the North American market with their products must have the relevant data sets reviewed by the European RDA and then entered into a data base in cooperation with LBNL. European manufacturers should submit the required data sets by email to IGDB@ise.fraunhofer.de. The necessary forms can be downloaded from the LBNL page https://windows.lbl.gov/submitting-data. Fraunhofer ISE is willing to advise and support manufacturers during the submission process.
Schematic drawing of the network of product databases. Planners use software applications which directly access the product databases which are represented by clouds in the top row. A common application programming interface (API) facilitates this exchange and is represented by a gear wheel. A metabase manages the identifiers of components and institutions and can be used to query all databases at once.
Point-in-time rendering image of an office equipped with solar-shading made of the same fabric but characterised by high-resolution BTDFs applying peak extraction. The fabric covers the entire window. The view through the fabric is of a dark foreground and the sky, including the sun.
False-colour luminance image generated from the point-in-time rendering data. Sunlight that has been transmitted directly and scattered by the fabric is visible at the upper left.
Glare source image calculated from the point-in-time rendering data by applying the Radiance evalglare routine.
Publications
Final Report
WP2
- Maurer, C., Wacker, S., Bueno, B., Jonsson, J.C., Lamy, H., Bush, D., Shi, M., Sprenger, W., Mitchell, R., Wilson, H.R., Curcija, D.C., Kuhn, T.E. “Optical and Calorimetric Product Data in Building Information Modelling”. Proceedings of Building Simulation 2021, International Building Performance Simulation Association, Bruges, September 1-3, 2021
- Maurer, C.; Wacker, S.; Bueno, B.; Jonsson, J.C.; Lamy, H.; Bush, D.; Shi, M.; Sprenger, W.; Mitchell, R.; Wilson, H.R.; Curcija, D.C.; Kuhn, T.E. 2024. "A product data network to enable faster, easier, and better planning of building envelopes". Journal of Building Engineering.
WP1
- Bueno B., Sepúlveda A., Maurer C., Wacker S., Wang T., Kuhn T.E., Wilson H.R.. “Easy-to-Implement Simulation Strategies for Annual Glare Risk Assessments based on the European Daylighting Standard EN 17037”. Proceedings of Building Simulation 2021, International Building Performance Simulation Association, Bruges, September 1-3, 2021
- Sepúlveda, A., Bueno B., Wang T., Wilson H.R.. Benchmark of methods for annual glare risk assessment. Building and environment 2021 (2021), ISSN: 0360-1323. DOI: 10.1016/j.buildenv.2021.108006.
- Ward G.J., Bueno B., Geisler-Moroder D., Grobe L.O., Jonsson J.C., Lee E.S., Wang T., Wilson H.R. Daylight Simulation Workflows Incorporating Measured Bidirectional Scattering Distribution Functions. Energy and Buildings 2022 259 (2022) 111890.
- Geisler-Moroder, D. (Ed.), Lee, E.S., Ward, G., Bueno, B., Grobe, L.O., Wang, T., Deroisy, B., Wilson, H.R. (2021). “BSDF generation procedures for daylighting systems”. White paper. T61.C.2.1 - A Technical Report of Subtask C, IEA SHC Task 61 / EBC Annex 77. DOI: 10.18777/ieashc-task61-2021-0001.
- Geisler-Moroder, D. (Ed.), Apian-Bennewitz, P., de Boer, J., Bueno, B., Deroisy, B., Fang, Y., Grobe, L.O., Jonsson, J.C., Lee, E.S., Tian, Z., Wang, T., Ward, G.J., Wilson, H.R., Wu, Y. „Analysis and evaluation of BSDF characterization of daylighting systems.“ T61.C.2.2 – A Technical Report of Subtask C, IEA SHC Task 61 / EBC Annex 77.
- Tan, Y., Peng, J., Curcija, D.C., Gao, J., Hart, R., Jonsson, J.C.. 2020. Parametric Study of Venetian Blinds for Energy Performance Evaluation in Residential Buildings. Energy Journal May 2020.
- Hart, R., Selkowitz, S., Curcija, D.C. 2018. Thermal Performance and Potential Annual Energy Impact of Retrofit Thin-glass Triple-Pane Glazing in US Residential Buildings. Build. Simul. (2019) 12: 79.
- Tan, Y.; Curcija, D.C.; Hart, R.; Jonsson, J.; Selkowitz, S.E. 2020. “Parametric study of the impact of window attachments on air conditioning energy consumption.” Solar Energy. 202. 136-143.
- Tan, Y.; Peng, J.; Luo, Y.; Gao, J.; Luo, Z.; Wang, M.; Curcija, D.C.; 2022. “Parametric study of venetian blinds for Energy Performance Evaluation and Classification in Residential Buildings.” Energy. Volume 239, Part D, 15 January 2022.
- Peng, J; Curcija, D.C.; and Hart, R.G. 2021. Energy Performance Indices EPC and EPH Calculation Methodology and Implementation in Software tool. LBNL Technical Report. Berkeley, CA. September 2021.
WP4
- Jonsson, J.C., Wilson H.R., Bilokur, M. (2021) “Preliminary report on LBNL 2019 inter-laboratory comparison for laboratories submitting scattering glazing data to the CGDB”, LBNL web site: https://windows.lbl.gov/2019-complex-glazing-ilc.
- Geisler-Moroder, D. (Ed.), Lee, E.S., Ward, G., Bueno, B., Grobe, L.O., Wang, T., Deroisy, B., Wilson, H.R. (2021). “BSDF generation procedures for daylighting systems”. White paper. T61.C.2.1 - A Technical Report of Subtask C, IEA SHC Task 61 / EBC Annex 77. DOI: 10.18777/ieashc-task61-2021-0001.
- Geisler-Moroder, D. (Ed.), Apian-Bennewitz, P., de Boer, J., Bueno, B., Deroisy, B., Fang, Y., Grobe, L.O., Jonsson, J.C., Lee, E.S., Tian, Z., Wang, T., Ward, G.J., Wilson, H.R., Wu, Y. „Analysis and evaluation of BSDF characterization of daylighting systems.“ T61.C.2.2 – A Technical Report of Subtask C, IEA SHC Task 61 / EBC Annex 77. DOI: 10.18777/ieashc-task61-2021-0012.
- Geisler-Moroder, D. (Ed.); Lee, E.S., Apian-Bennewitz, P.; de Boer, J., Bueno, B.; Deroisy, B., Fang; Y., Grobe, L.O.; Hauera, M.; Hoffmann, S.; Jonsson, J.C.; Maurer, C.; Plorer, D., Subramaniam, S., Tiank, Z.; Wang, T.; Ward, G.; Grobe, L.O.; Wang, T.; Weitlanerm, R.; and Wilson, H.R. 2024. "BSDF Data generation for daylight applications: A call for international standardization". Lighting Res. Technol. 2024; XX: 1–25.