A numerical study of adaptive building enclosure systems using solid–solid phase change materials with variable transparency
A numerical study of adaptive building enclosure systems using solid–solid phase change materials with variable transparency
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DOI：
10.1016/j.enbuild.2018.02.054
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发表时间：
2018-05
影响因子：
6.7
通讯作者：
G. Guldentops;G. Guldentops;Giuseppe Ardito;Mingjiang Tao;S. Granados-Fócil;S. Dessel
中科院分区：
文献类型：
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作者：
G. Guldentops;G. Guldentops;Giuseppe Ardito;Mingjiang Tao;S. Granados-Fócil;S. Dessel
建筑物目前消耗了美国所有能源使用的40%左右，因此在减少全球温室气体排放方面发挥着重要作用。被动式太阳能设计策略可用于限制建筑物的供暖和制冷需求。然而，目前的被动式太阳能设计策略需要为每个单独的项目进行大量的设计工作，通常需要机械和电气控制系统，并且该方法也难以在建筑改造项目中实施。固-固相变材料（SS-PCM）是目前新兴的用于热能储存的替代材料。在这里，我们提出了一个探索性的研究两个创新的气候响应建筑围护系统，采用透明的变化和潜热存储能力的SS-PCM的机制，被动控制建筑物温度。第一个系统是基于一个薄的SS-PCM层，它被放置在一个高反射膜的顶部，以控制太阳能热增益。第二个系统使用一层SS-PCM泡沫来储存热能和控制热流。使用有限元建模技术的系统的性能特性进行评估。模拟结果揭示了系统的不同组成部分之间的协同作用，并表明，这两个系统可以减少不必要的建筑物和环境之间的热交换，如果设计得当。提出了关于各种材料和系统参数的建议，包括SS-PCM的衰减系数、系统厚度、基于SS-PCM泡沫的系统的空隙比和空隙比的分布以及相变温度。
Buildings currently consume about 40% of all energy use in the US and therefore play an important role in mitigating global greenhouse gas emissions. Passive solar design strategies can be used to limit building heating and cooling demands. Current passive solar design strategies, however, require substantial design effort for each individual project, often require mechanical and electrical control systems, and the approach is also difficult to implement in building retrofit projects. Solid–solid phase change materials (SS-PCM) are currently emerging as alternative materials for thermal energy storage. Here we present an exploratory study on two innovative climate responsive building enclosure systems that employ the transparency change and latent heat storage capacity of SS-PCMs as mechanisms to passively control building temperature. The first system is based on a thin layer of SS-PCM that is placed on top of a highly reflective film to control solar heat gain. The second system uses a layer of SS-PCM foam to store thermal energy and control heat flow. The performance characteristics of the systems are evaluated using finite element modeling techniques. Simulation results shed light on the synergistic interactions between different components of the systems and indicate that both systems can reduce undesirable heat exchange between the building and its environment if designed properly. Recommendations are made regarding various material and system parameters, including the attenuation coefficient of the SS-PCM, system thickness, void ratio and distribution of the void ratio of the SS-PCM foam based system, and phase transition temperature.