In this research, octadecane paraffin was served as a PCM, and a structural concrete with the function of indoor temperature control was developed by using a macro-encapsulated PCM hollow steel ball (HSB). The application of thermal energy storage with phase change materials (PCMs) for energy efficiency of buildings grew rapidly in the last few years. PMID:28787859ĭevelopment of Hollow Steel Ball Macro-Encapsulated PCM for Thermal Energy Storage Concrete. It can be very effective in transferring the heating and cooling loads away from the peak demand times. The indoor thermal performance test revealed that concrete with macro-encapsulated octadecane-HSB was capable of reducing the peak indoor air temperature and the fluctuation of indoor temperature. The compressive strength of concrete with macro-encapsulated PCM-HSB at 28 days ranged from 22 to 40 MPa. The macro-encapsulated PCM-HSB has a latent heat storage capacity as high as 200.5 J/g. Test results showed that the maximum percentage of octadecane carried by HSBs was 80.3% by mass. The macro-encapsulated PCM-HSB was prepared by incorporation of octadecane into HSBs through vacuum impregnation.
Developed composite materials are promising in the field of energy saving in buildings.ĭevelopment of Hollow Steel Ball Macro-Encapsulated PCM for Thermal Energy Storage Concreteĭong, Zhijun Cui, Hongzhi Tang, Waiching Chen, Dazhu Wen, Haibo The PCM distribution inside wood sample has been studied as well as its thermophysical, mechanical and fire reaction properties. The PCM used are paraffin waxes (RT-21 and RT-27 from Rubitherm) and the wood used was black alder, the most common wood in Latvia. Impregnation of PCM (phase change material) in wood increases its thermal mass and regulates temperature fluctuations during day and night. The aim of this work was to test properties of novel PCM/wood composite materials developed at Riga Technical University. This fact will deal with the reduction of the gap between energy supply and energy demand to achieve thermal comfort in building indoors.
The development of new materials to store thermal energy in a passive building system is a must to improve the thermal efficiency by thermal-regulating the indoor temperatures. PCM/wood composite to store thermal energy in passive building envelopesīarreneche, C.
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