单坡太阳能的热和海水淡化性能提升仍然使用相变材料
Suvanjan Bhattacharyya1, Surjo Das2, Sumit Khatri1
1Department of Mechanical Engineering, Birla Institute of Technology and Sciences Pilani, Pilani Campus, Vidya Vihar, Pilani, Rajasthan, India.
Scientific reports
|April 4, 2025
概括
铁氧化物纳米粒子增强相变材料 (PCM) 在太阳能淡化过程中表现出优越的化性能. 这种最佳的PCM选择提高了整个海水淡化效率.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 可再生能源可再生能源是可再生能源.
背景情况:
- 太阳能静止灯对于淡化至关重要,但热能储存可以限制效率.
- 阶段变换材料 (PCM) 在太阳能海水淡化系统中提供了改进热管理的潜力.
研究的目的:
- 以数值分析各种PCM的化行为.
- 确定一个最佳的PCM来提高单坡太阳能静止效率.
- 根据可用性,成本,环境影响和热物理性质来评估PCM.
主要方法:
- 使用ANSYS Fluent 18.1进行数值模拟.
- 对五种不同的PCM进行了融过程的比较分析.
- 在不同时间间隔评估PCM性能,重点是融完成.
主要成果:
- 用Fe3O4纳米粒子增强的PCM在5000s时显示完全化,表现优于其他.
- 在CaCl2·6H2O (无机) 中,最大的液体分量达到68%.
- n-octadecane (有机) 的最大液体分量达到~57%,其次是劳里酸 (~49%) 和RT35 (~41%).
结论:
- 用Fe3O4纳米粒子增强的PCM是太阳能静止应用中最有效的.
- 选择PCM显著影响淡化效率.
- 数值分析提供了一种可靠的方法来优化太阳能系统中的PCM选择.
相关概念视频
02:44Heating and Cooling Curves
22.3K
When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance,...
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance,...
22.3K
01:19Phase Changes
4.1K
Phase transitions play an important theoretical and practical role in the study of heat flow. In melting or fusion, a solid turns into a liquid; the opposite process is freezing. In evaporation, a liquid turns into a gas; the opposite process is condensation.
A substance melts or freezes at a temperature called its melting point and boils or condenses at its boiling point. These temperatures depend on pressure. High pressure favors the denser form of the substance, so typically, high pressure...
A substance melts or freezes at a temperature called its melting point and boils or condenses at its boiling point. These temperatures depend on pressure. High pressure favors the denser form of the substance, so typically, high pressure...
4.1K