Determination of Specific Heat Capacity on Composite Shape-Stabilized Phase Change Materials and Asphalt Mixtures by Heat Exchange System

被引：49
作者：
Ma, Biao [1 ]
Zhou, Xue-yan [1 ]
Liu, Jiang [2 ]
You, Zhanping [1 ,3 ]
Wei, Kun [1 ]
Huang, Xiao-feng [1 ]
机构：
[1] Changan Univ, Key Lab Special Area Highway Engn, Minist Educ, Xian 710064, Shaanxi, Peoples R China
[2] Architectural Design & Res Inst Guangdong Prov, Xian Branch, Xian 710064, Shaanxi, Peoples R China
[3] Michigan Technol Univ, Dept Civil & Engn Environm, Houghton, MI 49931 USA
来源：
MATERIALS | 2016年 / 9卷 / 05期
关键词：
road engineering; CPCM; specific heat capacity; heat exchange system; phase change material; asphalt mixture; PCM; PERFORMANCE;
D O I：
10.3390/ma9050389
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Previous research has shown that composite shape-stabilized phase change material (CPCM) has a remarkable capacity for thermal storage and stabilization, and it can be directly applied to highway construction without leakage. However, recent studies on temperature changing behaviors of CPCM and asphalt mixture cannot intuitively reflect the thermoregulation mechanism and efficiency of CPCM on asphalt mixture. The objective of this paper is to determine the specific heat capacity of CPCM and asphalt mixtures mixed with CPCM using the heat exchange system and the data acquisition system. Studies have shown that the temperature-rise curve of 5 degrees C CPCM has an obvious temperature plateau, while an asphalt mixture mixed with 5 degrees C CPCM does not; with increasing temperature, the specific heat capacities of both 5 degrees C CPCM and asphalt mixture first increase and then decrease, while the variation rate of 5 degrees C CPCM is larger than that of the asphalt mixture, and the maximum specific heat capacity of 5 degrees C CPCM appears around the initial phase change temperature. It is concluded that the temperature intervals of 5 degrees C CPCM are -18 degrees C-7 degrees C, 7 degrees C-25 degrees C and 25 degrees C-44 degrees C, respectively, and that of the asphalt mixture are -8 degrees C similar to 10 degrees C, -0 degrees C similar to 5 degrees C and 5 degrees C similar to 28 degrees C. A low dosage of 5 degrees C CPCM has little influence on the specific heat capacity of asphalt mixture. Finally, the functions of specific heat capacities and temperature for CPCM and asphalt mixture mixed with CPCM were recommended by the sectional regression method.
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页数：15
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