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BIPV Envelope Design Optimization at Conceptual Design Stage
S.T. Imalka, P. Wijeratne, R. Yang, R. Wakefield
Optimization, Building Integrated PV (BIPV), Life Cycle Energy (LCE)
PV Systems Engineering, Integrated/Applied PV
Subtopic: PV and Buildings
Event: 8th World Conference on Photovoltaic Energy Conversion
Session: 4BV.1.16
1204 - 1208
ISBN: 3-936338-86-8
Paper DOI: 10.4229/WCPEC-82022-4BV.1.16
0,00 EUR
Document(s): paper


The design of BIPV envelopes involves a large set of envelope-related parameters, PV-related parameters, and conflicting performance criteria. Both building functionality and the energy system are influenced by BIPVs. Therefore, BIPV envelope design has become a complex process. Optimization is an impressive way to support BIPV façade design and is rarely used in early building design. Consideration of building envelope-related parameters and product-related parameters simultaneously for different BIPV application areas has not been fully realized due to the complexity of the parameterization of variables. Therefore, this study utilizes a genetic algorithm (GA) based multiobjective optimization (MOO) framework to identify optimal alternative BIPV envelope design options at the conceptual design stage which maximizes life cycle energy (LCE) generation and minimizes life cycle cost (LCC) simultaneously considering multiple BIPV products for different BIPV application areas. Six BIPV application areas including, curtain wall, window, double-skin façade, balcony, parapet, and shading devices were tested using the utilized framework. The case study results indicated that the utilized optimization framework could be a useful tool for designers in the conceptual design phase of a BIPV façade. In addition, the optimization process provided an insight into the design space as well as trade-off patterns between multiple design objectives.