Storage of thermal energy for effective use of waste heat from industries
Storage of thermal energy for effective use of waste heat from industries
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DOI：
10.1016/0924-0136(94)01723-e
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发表时间：
1995-01
影响因子：
6.3
通讯作者：
J. Yagi;T. Akiyama
中科院分区：
文献类型：
--
作者：
J. Yagi;T. Akiyama
节能是保护全球环境的最有效的战略之一。目前，冶金、化工等行业排放出大量的余热，回收后不仅可以用于市政，还可以用于工业。本论文对潜热蓄热过程进行了传热学基础研究，旨在开发一种可回收500 K以上高温余热的潜热蓄热技术。对单一封装相变材料和填充床进行了传热实验。从高能量密度存储、化学稳定性、无毒和性价比的角度，对六种不同的材料作为PCM进行了测试。两种无机材料，四种金属材料。将含有PCM的单个胶囊加热用于储热，然后在对流传热占主导地位的氮气流中冷却用于放热。金属相变材料被认为是优秀的热存储，因为在胶囊中的均匀温度。对球形胶囊填充床过程进行了传热模拟，为优化设计提供了基础信息。结果表明，顺流蓄放热比逆流蓄放热更能有效利用蓄热。还评估了（火用）效率。
Energy saving is one of the most effective strategies to protect the global environmental conditions. At present, considerable amount of waste heat is emitted from metallurgical and chemical industries, which can be used not only for municipal purposes but also for industries if recovered. In this paper, fundamental studies on heat transfer was conducted for developing a heat storage process by latent heat for recovering the high temperature waste heat over 500 K. Heat transfer experiments were attempted for a single encapsulated phase change materials and for a packed bed. Six different materials were tested as PCM from the points of view of high energy density storage, chemical stability, non-toxicity and cost performance. Those were two inorganic and four metallic materials. A single capsule containing PCM was heated for heat storage and then cooled for heat release in nitrogen gas stream where convective heat transfer was predominant. The metal PCMs were found to be excellent for heat storage because of uniform temperature in the capsule. Heat transfer simulation was also conducted for a packed bed process of spherical capsules providing the fundamental informations on the optimal design. As a result, concurrent flow for heat storage and release showed better result for effective use of storaged heat than counter-current flow. Exergy efficiency was also evaluated.