Building Physics as a Tool for Development of New Components: Roof Window

SUSTAINABLE BUILT ENVIRONMENT D-A-CH CONFERENCE 2019

生态环境科学

Tywoniak, J.^1 ; Calta, V.^1 ; Stank, K.^1 ; Novák, J.^1 ; Maierová, L.^1

Czech Technical University in Prague, University Centre for Energy Efficient Buildings, Trinecka 1024, Bustehrad

CZ 273 43, Czech Republic^1

关键词: Building envelopes;    External temperature;    Industrial partners;    Measuring procedure;    Technical design;    Thermal Performance;    Thermal transmittance;    Water vapor condensation;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/323/1/012150/pdf
DOI  :  10.1088/1755-1315/323/1/012150

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Knowledge and instruments of building physics (calculation methods and measuring procedures) can be used as key tools and perspectives to develop new components for building envelopes. This paper illustrates this fact by presenting the successful development of a roof window fulfilling higher requirements on reduction of overall heat losses and avoiding the risk of water vapor condensation on surfaces at very low external temperatures (thermal transmittance below 0.7 W/m2K in the first generation, close to 0.5 W/m2K in the second one) and better daylight distribution for the interior. This is the result of a publicly supported project with an industrial partner: from a general idea through detailed analysis of thermal performance in geometrical and material alternatives up to construction, prototyping, and verification by measurements and certification. Building physics tools applied in the project are discussed here together with lessons learned which are important for technical design. An effective shading system equipped with PV elements for energy smart harvesting is mentioned in the conclusion.