Hygrothermal Simulation of Prefabricated Cold-formed Wall Panels
Keywords:cold-formed steel, hygrothermal simulation, thermal bridge, stainless steel, prefabricated elements
AbstractSteel structures are light and durable, but in the building envelope they can transfer heat energy easily from the building interior to outside and hinder the energy performance of the building. In this study, we simulate the thermal performance of cold-formed steel panels that can be used as prefabricated units in building envelopes. More precisely, the thermal performance of hollow cold-formed steel elements ﬁlled with thermal insulation is studied with varying panel geometry. The focus is on stainless steel but also mild steel is brieﬂy considered. Attention is paid especially to the thermal bridges associated to the relatively high thermal conductivity of steel materials. The inﬂuence of the width, depth and the height of the panel to thermal bridging is assessed and panel geometries with reasonable thermal performance are found. By considering also the moisture transport, the overall hygrothermal performance of the panels is then evaluated.
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