Performative skins for passive climatic comfort: A parametric design process

The performance-oriented design of large roof structures for semi-outdoor spaces is investigated with the aim to integrate performance evaluations in the early stages of the design process. In particular, daylight and thermal comfort are improved under large structures by exploring passive solar strategies that reduce the need for imported energy. The performance oriented, parametric design approach we developed is structured in two parts. One part uses parametric geometry to generate design alternatives, and the other part uses performance based exploration and evaluation of alternatives. We discuss how the performance based exploration is accomplished using a tool called ParaGen. The potential of the method is shown in a case study of the SolSt roof. The design process of SolSt is based on parametric variations of its curvature, the density of its modules and the geometry of its cladding, and is explored based on daylight and solar exposure of the covered space.