Expanded Vermiculite A Promising Natural Encapsulation Material of LiNO3, NaNO3, and KNO3 Phase Change Materials for Medium-Temperature Thermal Energy Storage

doi:10.1002/adem.201800135

CORC > 青海盐湖研究所 > 中国科学院青海盐湖研究所 > 盐湖资源与化学实验室

	Expanded Vermiculite A Promising Natural Encapsulation Material of LiNO3, NaNO3, and KNO3 Phase Change Materials for Medium-Temperature Thermal Energy Storage
	Deng, Yong; Li, Jinhong; Nian, Hongen
刊名	ADVANCED ENGINEERING MATERIALS
	2018-08
卷号	20 期号:8
ISSN号	1438-1656
DOI	10.1002/adem.201800135
英文摘要	In the study, with LiNO3, NaNO3, and KNO3 as medium-temperature phase change materials (PCMs) and expanded vermiculite (EVM) as the encapsulation material, form-stable composite PCMs (fs-CPCMs) are prepared. The experimental value of maximum encapsulation mass fractions of LiNO3-EVM, NaNO3-EVM, and KNO3-EVM is, respectively, 84.6, 85.7, and 87.0wt%, which is lower than the theoretical value since the pore structures of EVM are not fully filled by PCMs. SEM results indicate that the PCMs are uniformly distributed and embedded into the pores or on the surfaces of EVM. The excellent chemical compatibility of PCMs with EVM is confirmed by XRD and FT-IR results. DSC tests indicate the phase change temperatures of three fs-CPCMs are between 243.1 and 325.1 degrees C and that latent heats are between 83.1 and 295.4Jg(-1). After 100 melting/solidification cycles, the decrease in latent heats of fs-CPCMs are below 1.91%, exhibiting desirable thermal reliability. The thermal conductivity of LiNO3-EVM, NaNO3-EVM, and KNO3-EVM is, respectively, 0.51, 0.44, and 0.33W/(mK), indicating acceptable thermal energy charging/discharging rate. TGA analysis reveal that fs-CPCMs show good thermal stability within the designed working temperature range. Therefore, EVM is a promising natural encapsulation material for medium-temperature heat storage.
内容类型	期刊论文
源URL	[http://ir.isl.ac.cn/handle/363002/34476]
专题	青海盐湖研究所_盐湖资源与化学实验室
推荐引用方式 GB/T 7714	Deng, Yong,Li, Jinhong,Nian, Hongen. Expanded Vermiculite A Promising Natural Encapsulation Material of LiNO3, NaNO3, and KNO3 Phase Change Materials for Medium-Temperature Thermal Energy Storage[J]. ADVANCED ENGINEERING MATERIALS,2018,20(8).
APA	Deng, Yong,Li, Jinhong,&Nian, Hongen.(2018).Expanded Vermiculite A Promising Natural Encapsulation Material of LiNO3, NaNO3, and KNO3 Phase Change Materials for Medium-Temperature Thermal Energy Storage.ADVANCED ENGINEERING MATERIALS,20(8).
MLA	Deng, Yong,et al."Expanded Vermiculite A Promising Natural Encapsulation Material of LiNO3, NaNO3, and KNO3 Phase Change Materials for Medium-Temperature Thermal Energy Storage".ADVANCED ENGINEERING MATERIALS 20.8(2018).