Search

Phase change energy storage technology enhances the integration of renewable resources into low-carbon energy systems for grassland pastoral settlements, further addressing the balance between energy needs and environmental sustainability. This study examines a heating system using an experimental platform in an environmental chamber, where the thermal storage and release processes of phase change energy storage flooring were monitored. The results revealed that phase change energy storage flooring exhibits higher heat transfer efficiency and faster heating rates. Under 40 °C heating conditions, the heating rate of the thermal storage layer increased by 12.5% within 1 h. The flooring also demonstrated superior heat release performance, with the peak heat flux of the thermal storage layer delayed by 15 min. Higher heating temperatures shortened the heating time and extended the heat release duration of the phase change energy storage flooring. Under 45 °C heating conditions, the heat transfer efficiency of the surface temperature of the thermal storage layer increased by 38% within 1 hour and by 24.7% over 4 h. In addition, energy consumption in different tests was analyzed, and thermal conductivity was discussed according to the heat transfer model. Phase change energy storage flooring, when coupled with the abundant solar energy resources available in grassland pastoral areas, presents a viable option for the construction of low-carbon energy systems in grassland pastoral settlements.

This study examines Internet Connectedness and civic engagement in post-disaster Fukushima, Japan. Internet Connectedness encompasses the post-access digital divide, conceptualized through intensity, activity scope, centrality, and place scope. Guided by communication infrastructure theory, structural equation modeling results indicate that individuals who engage in broader types of online activities and perceive the Internet as more central had stronger connections to their online neighborhood storytelling network (online ICSN). Higher online ICSN and a broader Internet activity scope led to increased civic engagement on social media, subsequently positively affecting offline civic engagement. The study results offer specific measures and guidelines for narrowing the digital divide and fostering residents’ community engagement, which are likely to play essential roles in disaster preparedness and resilience. [ABSTRACT FROM AUTHOR]