Abstract This experiment aimed at the development of energy efficient and sustainable building materials. The specimens were made using loess, styrene butadiene latex (SBL), shape stable phase change material (SSPCM) made from x-GnP and n-octadecane for mechanical and thermal performance improvement. Compressive strength test, FT-IR (Fourier-transform infrared spectroscopy) and dynamic thermal transfer experiment were performed. From the result of the compressive strength test, it was found that the addition of SBL increases the compressive strength and the addition of SSPCM reduces the compressive strength. FT-IR analysis revealed no chemical reaction between PCM and x-GnP, indicating only physical binding. As a result of the dynamic heat transfer analysis, peak temperature reduction was observed. According to energy analysis, storage capacity energy was improved and PCM 7.5 was the most energy efficient.
Latent heat storage based on phase-changing materials (PCMs) is a promising technology for thermal energy storage because of its large heating enthalpy and isothermal phase-transition temperature. However, the practical applications of PCMs is highly restricted because of their intrinsically low thermal conductivity, which limits real-time energy storage/release, seepage during the phase-transition process, and expensive supporting materials. Therefore, the development of shape-stable composite PCMs by using renewable precursors, such as biomass, has received considerable research attention because of their low cost, environmental friendliness, and availability. In this study, waste biomass materials (food waste and wood waste) activated by KOH were pyrolyzed to produce biochar/biocarbon and subsequently used for organic PCM, dodecane, encapsulation. The obtained biochar exhibited a high specific surface area and pore size distribution. The biochar–dodecane composite (FWP) was designed by using a solvent-free facile vacuum impregnation method. The composite materials exhibited high leakage resistance, improved thermal stability, and improved PCM loading capacity (67.98%). FWP exhibited high latent heat retention of 87.7% after multiple thermal cycles and excellent chemical compatibility with composite constituents. Thus, biochar, derived from biowaste, with organic PCM can be effective in numerous thermal-regulation applications, including air conditioning, and further open avenue for converting waste-to-energy.
'%3e%3cg id='b'%3e%3cpath id='a' stroke='%23000' stroke-width='2' d='M-6-25H6m-12 3H6m-12 3H6'/%3e%3cuse xlink:href='%23a' y='44'/%3e%3c/g%3e%3cpath stroke='%23fff' d='M0 17v10'/%3e%3ccircle r='12' fill='%23cd2e3a'/%3e%3cpath fill='%230047a0' d='M0-12A6 6 0 0 0 0 0a6 6 0 0 1 0 12 12 12 0 0 1 0-24z'/%3e%3c/g%3e%3cg transform='rotate(-123.69)'%3e%3cuse xlink:href='%23b'/%3e%3cpath stroke='%23fff' d='M0-23.5v3M0 17v3.5m0 3v3'/%3e%3c/g%3e%3c/svg%3e)