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Abstract:In this study, the heat flow characteristics and thermal performance of a dry storage cask were investigated via thermal flow experiments and a computational fluid dynamics (CFD) simulation. The results indicate that there are many inner circulations in the flow channel of the cask (the channel width is 10 cm). These circulations affect the channel airflow efficiency, which in turn affects the heat dissipation of the dry storage cask. The daily operating temperatures at the top concrete lid and the upper locations of the concrete cask are higher than those permitted by the design specification. The installation of the salt particle collection device has a limited negative effect on the thermal dissipation performance of the dry storage cask.

To cope with the crisis of frequent occurrences of extreme weather, various sectors are striving to find a way to ease climate change. A common consensus indicates that to reverse this crisis, we should reduce fossil fuel consumption, rely more on renewable energy, conserve energy, improve energy efficiency, and protect the forests. To enable these measures to achieve full effect, the implementation of energy education is a topic that demands immediate attention. In Taiwan, the building energy sector is closely related to people's lives, and the energy consumption of building industries accounts for 12% of the total national energy consumption. Based on intuitive daily experiences, an energy-saving and carbon-reduction curriculum on the building sector (Green Building) is deemed a feasible approach for elementary school students to promote their capacities of energy cognition, attitude and practice. In this study, the "building sector (Green Building)" was used as a research topic for energy education to be integrated within the energy education context, experiential learning activities, and effective transformation into the curriculum. Participating university faculty and elementary school teachers engaged in collaborative action research concerning development of a curriculum, including identifying suitable study materials, course development (course planning, curricula, teaching module innovation, trial teaching), and assessments.

This article considers the problem of natural heat transfer in a rectangular thermosiphon to investigate the effects of wall properties (thickness and thermal conductivity) on the heat-transfer characteristics of phase-change-material (PCM) suspension flow. The following parameter ranges were investigated: dimensionless loop-wall thickness, 0–0.5; wall-to-fluid thermal-conductivity ratio, 0.1–100; modified Rayleigh number, 1010–1011; and volumetric fraction of PCM particles, 0–10%. From numerical simulations via the finite-volume approach, it was found that using a pipe with appropriate wall thickness and thermal conductivity containing PCM suspensions for the heating section of a rectangular thermosiphon can effectively control the maximal temperature.