This paper reports an experimental investigation focused on nano-enhanced phase change materials (NEPCM). Two different types of phase change materials (RT28 HC and RT26) with relatively low thermal conductivity and reasonable volumetric specific heat capacity were utilized as the base for NEPCMs with four types of nanoparticles (CuO, ZnO, Ag, and graphene). The novel four-phase preparation procedure was thoroughly presented together with a description of the measurement technology which was used for the examination of NEPCM thermal constants. The experimental results revealed that in most cases the thermal constants of samples were improved, such as thermal conductivity and volumetric specific heat capacity in a range of about 4% to 21% and 5% to 33%, respectively. In some cases, significant degradation of certain thermal constants was detected, such as in the case of the Graphene/RT26 nanocomposite. The possible nanomaterial selection strategies also discussed taking into account the economic aspects and experimental results related to the thermal constants. The results revealed that the selection of nanomaterials should be carefully considered with respect to the specific application since it is possible to manipulate the thermo-physical properties of the NEPCM as a unique combination of nanomaterial and PCM.

本文报告了一项针对纳米增强相变材料（NEPCM）的实验研究。具有相对较低的热导率和合理的体积比热容的两种不同类型的相变材料（RT28 HC和RT26）被用作具有四种类型的纳米粒子（CuO，ZnO，Ag和石墨烯）的NEPCM的基础。彻底介绍了新颖的四相制备程序，并描述了用于检查NEPCM热常数的测量技术。实验结果表明，在大多数情况下，样品的热常数得以改善，例如热导率和体积比热容分别在约4％至21％和5％至33％的范围内。在某些情况下，检测到某些热常数明显下降，例如在石墨烯/ RT26纳米复合材料的情况下。还讨论了可能的纳米材料选择策略，同时考虑了经济方面和与热常数相关的实验结果。结果表明，应根据具体应用仔细考虑纳米材料的选择，因为有可能将NEPCM的热物理性质作为纳米材料和PCM的独特组合进行操纵。