A state-space based method to predict thermal performance of pipeembedded double skin façade: case study in Guangzhou

Abstract

Pipe-embedded double skin facade, which arranges pipes in shading device, is an alternative to reduce indoor demand and save energy. To simulate annual performance of this system, a simplified approach based on optical and thermal property is proposed at first, in which dynamic performance is acquired through state-space method. Then the model is validated with former investigation and shows good accuracy. Indoor room temperature with the pipe-embedded double skin façade is analyzed under different types of room in Guangzhou at last. Results show that the pipe-embedded double skin façade could guarantee a barely satisfactory indoor environment where indoor heat gain is small in most time. Besides, superiority would be obvious when solar radiation is strong, indicating the applicability in some typical region with abundant sunshine. KEYWORDS natural energy, pipe-embedded window, double skin facade, heat gain, free-running temperature NOMENCLATURE DSF double skin façade PDSF pipe-embedded double skin façade CFD computational fluid dynamics LMTD logarithmic mean temperature difference