A parametric modeling approach for the integrative design of solar façade and façade-integrated two-stage solar concentrators (TSSCs)

Nayab Bushra

Applied Energy, 2024, vol. 375, issue C, No S0306261924014557

Abstract: This study presents a novel method for integrating two-stage solar concentrators (TSSCs) as façade-integrated energy supply systems. However, the performance of these systems not only depends on optimal configurations but also on good façade designs where unfavorably oriented façades lead to performance degradation. The design process of façade-integrated TSSCs poses a complex problem, where conflicting concerns from stakeholders need to be addressed. Thus, the method supports multi-criteria decision-making in the early-stage design of buildings employing TSSCs and enables engineering TSSCs relative to the vertical façade of ‘rectangular’ and tilted façade of ‘trapezoid’ building forms. This is enabled through a ‘three-step solar-driven’ integrative design in a parametric model that allows for designing the building and selecting a façade side (step 1); designing horizontally inclined ‘frames’ on the selective façade (step 2); and engineering TSSCs per frame configurations (step 3). The integrative design is facilitated by manipulating parameters related to the building (length, width, stories, base angle, orientation, and size and inclination of frames), and TSSC (type, module area, mirrors' separation distance, and module number). Thus, a large design space (33,600 solutions) is created, where buildings are assessed for energy use (EUse), direct normal irradiance on selective façade (DNIFaçade) and on frames (DNIFrames), useful daylight illuminance (UDI(100–2000 lx)), and continuous daylight autonomy (cDA(300 lx)), and TSSCs are assessed for average load match index (av.LMI), covered façade area (av.CFA), and energy cost ($/kWh). The application of the method is shown in a case study of hypothetical (residential) buildings (Berlin), which are illustrative (descriptive), depicting theoretical volumes as abstract representations of future buildings. The method enables a performance-driven design exploration of future constructions employing façade-integrated TSSCs, searches for the most feasible solutions, and helps to meaningfully support the decision-making process.

Keywords: Two-stage solar concentrator; Façade-integrated; Parametric model; Trapezoid building; Selective solar façade; Frames (search for similar items in EconPapers)
Date: 2024
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DOI: 10.1016/j.apenergy.2024.124072

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