Abstract
The incorporation of a phase change material (PCM) in building integrated photovoltaic (BiPV) façade can be applied to improve its thermal performance including more effective electrical conversion, however their real interaction needs to be investigated at adequate level. The aim of the presented paper is focused on the application of a material with high latent heat capacity based on PCM in the structure of double-skin BiPV façade. The key aspect concerns on an analysis of natural air flow movement affected by the storing/releasing heat energy from the PCM during daytime/night-time of days. The experimental campaign was performed using an experimental outdoor test cell where two full-scale façade samples (reference BiPV and experimental BiPV/PCM) were investigated. The strong effect of thermal inertia of the PCM identified by experimental measurements was observed on the façade air cavity temperature and air flow movement. Experimental results revealed that natural air flow regimes in façade cavities are nearly equal in the daytime, but in the night-time are totally different. The thermal emission from PCM increase the air temperature in the façade cavity and increase the velocity of air flow movement (PCM started solidified), mainly in the night-time.
Highlights
Many research studies have been focused on different ways for an optimization of building energy performance according to the world energy policy
The presented study is aimed on the novel type of the advanced double-skin façade with an outer layer of building integrated photovoltaic (BiPV) system coupled with a phase change material (PCM)
The aim of the study was to identify an effect of latent thermal energy storage based on the PCM in daytime/night-time of sunny days on the natural ventilation rate of façade air cavity integrated in a BiPV double-skin facade
Summary
Many research studies have been focused on different ways for an optimization of building energy performance according to the world energy policy. Integration of renewable sources into façade systems together with a combination of advanced responsive materials reveal essential possibly for overcome the actual world energy situation. The presented study is aimed on the novel type of the advanced double-skin façade with an outer layer of building integrated photovoltaic (BiPV) system coupled with a phase change material (PCM). The key function of the façade is based on the reduction of peak operating temperatures of the photovoltaic (PV) modules by PCM and to affect thermal response of air temperature inside the façade cavity. Huang et al [1,2] performed comprehensive research focused on PCMs for thermal management of limiting temperature rise in BiPV systems at concept stage
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