综上,为了强化相变材料的换热与储热,可以通过布置翅片增加换热面积;也可以通过添加纳米金属颗粒或碳基材料提高相变材料的热导率;同时,碳基材料的添加还可能使得材料的熔化潜热也随之增加;此外,对相变材料比热容的增加也可以进一步提高相变材料的储能容量。
相变储热/蓄冷技术是一种高效储能技术,即在电价较低时(用电低谷期),采用电制热/冷机进行制热/冷,将热量/冷量以相变潜热的方式储存起来;在电价较高时(用电高峰期),再把储存的热/冷量以相变凝固/溶解的形式释放出来,进而满足负荷侧对热/冷量的需求,实现用电负荷的“移峰填谷”,完成能源在时间和空间上的转移,为电厂和用户降本增效。
热能存储系统的出现,不仅有利于减少对化石燃料的依赖,而且有助于能源的高效使用和**环境友好型**。在该系统里,热能可以以显热和潜热的方式进行存储。相比于显热存储,潜热存储所需要的材料相对体积更小,因此潜热储能受到了更多的关注。相变材料因在相变过程中能吸收和释放大量的相变潜热,被广泛应用于热能存储和温度控制领域。
由于相变储能温度基本恒定,便于控制,规模化应用潜力巨大,当前研究多聚焦于不同场景下的相变材料。相变材料是指在某一特定温度下发生物理相态变化,以实现能量存储和释放的潜热储能材料。相变温度、潜热、比热容、热导率等是表征相变材料的重要性能指标。相变温度决定了相变储能的应用场景,典型相变材料石蜡、脂肪酸、多元醇、酯、烷烃、冰、结晶水合盐、金属合金、熔融盐的性质见表1。
而回收处理水蒸气的汽化潜热则由于温度降低有很大的改变,当排烟温度较大时,回收处理潜热很少,由于排烟温度的下降,回收处理潜热迅速变大,接着又稳定下来,从冷凝的角度来说,烟气冷凝工作难度随烟气温度的下降而变大。
***扮演王朝北椋王之子徐凤年,明为锦衣玉食纨绔风流的英俊公子哥,却被世人戏谑为金玉其外败絮其中的“徐草包”,实则胸藏沟壑,聪明绝顶。
潜热含义
潜热漫画 ,第一次打工的女大学生,每次到店里买「两包六毫米」的黑道,在一个雨天,她下定决心与他搭话——
【豆知识:潜热这个词,在化学中指的是物态变化、温度没有变化时,所吸收或释放的热量。】
潜热漫画讲什么
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