[1]张奕,张小松.调合石蜡的相平衡参数和相变动力学特性[J].东南大学学报(自然科学版),2008,38(4):657-661.[doi:10.3969/j.issn.1001-0505.2008.04.022]
 Zhang Yi,Zhang Xiaosong.Calculation of phase equilibrium and phase change dynamics of blended paraffin[J].Journal of Southeast University (Natural Science Edition),2008,38(4):657-661.[doi:10.3969/j.issn.1001-0505.2008.04.022]
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调合石蜡的相平衡参数和相变动力学特性()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
38
期数:
2008年第4期
页码:
657-661
栏目:
化学化工
出版日期:
2008-07-20

文章信息/Info

Title:
Calculation of phase equilibrium and phase change dynamics of blended paraffin
作者:
张奕12 张小松1
1 东南大学能源与环境学院, 南京 210096; 2 南京师范大学动力工程学院, 南京 210042
Author(s):
Zhang Yi12 Zhang Xiaosong1
1 School of Energy and Environment,Southeast University, Nanjing 210096,China
2 School of Power Engineering, Nanjing Normal University, Nanjing 210042,China
关键词:
调合石蜡 正规溶液 熔点 浊点 相变速率
Keywords:
blended paraffin regular solution melting temperature cloud temperature phase change speed
分类号:
TQ021.2
DOI:
10.3969/j.issn.1001-0505.2008.04.022
摘要:
使用正规溶液模型的Scatchard-Hildebrand方程对调合石蜡的熔点、浊点以及固-液和组元相变速率进行了计算.以切片石蜡作为被调合石蜡的计算结果表明,烷烃的相变温度和切片石蜡相近时,该烷烃对调合石蜡的熔点、浊点以及相变动力学特性影响较小.增加C22类轻质烷烃的质量分数,调合石蜡的熔点、浊点降低; 熔程内较低温度下,轻质烷烃相变速率变慢,重质烷烃相变速率变快.增加C35类重质烷烃的质量分数,调合石蜡的浊点升高,熔点呈现复杂的变化,对C24以下烷烃的相变速率几乎没有影响,C25以上烷烃在熔程内较低温度下相变速率变慢.计算结果可以为相变储能中选用具有适当相变温度及相变动力学特性的调合石蜡提供指导.
Abstract:
The Scatchard-Hildebrand equation of regular solution is used to calculate the melting temperature, cloud temperature, and phase change dynamics of blended paraffin. The equation is confirmed for the calculation of phase equilibrium and phase change dynamics of blended paraffin. Calculation results of a paraffin show that alkanes having phase change temperature near to the paraffin have little influence on phase equilibrium and phase change dynamics of blended paraffin. The melting temperature and cloud temperature of blended paraffin decrease as content of light alkanes increases, while phase change speeds of light alkanes decline at low temperature within melting scope. The cloud temperature of blended paraffin increases with the content increase of heavy alkanes, the change of melting temperature is complex in this instance. The phase change speed of C22 to C24 has no relation with the content of C35, while the speed of other alkanes is slow-down as the content of C35 increases. This calculation can provide a guide for the choice of blended paraffin with appropriate phase equilibrium parameters and phase change dynamic characteristics used for thermal energy storage.

参考文献/References:

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备注/Memo

备注/Memo:
作者简介: 张奕(1968—),男,博士生,副教授; 张小松(联系人),男,博士,教授,博士生导师,rachpe@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(50376052,50676018)、教育部科学技术研究重大资助项目(307013).
引文格式: 张奕,张小松.调合石蜡的相平衡参数和相变动力学特性[J].东南大学学报:自然科学版,2008,38(4):657-661.
更新日期/Last Update: 2008-07-20