AIR CONDITIONING WITH THERMAL STORAGE IN BUILDING ELEMENTS MODIFIED WITH PHASE CHANGE MATERIALS
Air conditioning of residential and office buildings, significantly contributes to electrical consumption and peak power demand particularly in summertime. Thermal storage combined with night ventilation can be used to reduce energy consumption and peak-power demand as well as to downsize the refrigerating capacity of an air conditioning system. Energy efficiency and thermal capacity of such passive cooling systems based on thermal energy storage in building structure can be significantly improved by implementation of phase change material (PCM) in building elements such as wall covering material (gypsum board, plaster) or ventilated ceiling made of modified riband- slab tiles. In the paper a concept air conditioning system based on night ventilation and thermal storage in modified rib-and-slab tiles is presented. Microencapsulated phase change material (PCM) was utilized in order to increase thermal capacity of building elements. Numerical simulation was carried out as a preliminary study. Complex heat transfer and air flow model for a typical office room with ventilated ceiling was developed using Computer Fluid Dynamic (CFD) software. Thermal properties of building material modified by PCM were obtained from inverse analyses. The numerical analysis was verified by laboratory measurement done in a calorimetric chamber where thermal performance of modified by PCM and reference materials were tested. Tests results indicated that considered air conditioning system can improve thermal performance of an office and/or residential buildings by lowering overall energy consumption and carbon dioxide emission associated with air conditioning operation. In a reference case study an air condition system for an office space with ceiling construction modified by PCM, to enhance thermal storage, demonstrated significant reduction of heat loads and energy consumption.
M.PRYMON J.SCHNOTALE
Cracow University of Technology, Institute of Heat Engineering and Air Protection 24 Warszawska Str., 31-155 Krakow, Poland
国际会议
The 22nd International Congress of Refrigeration(第22届国际制冷大会)
北京
英文
2007-08-21（万方平台首次上网日期，不代表论文的发表时间）