化工学报2019，Vol.70Issue(9)：3238-3247,10.DOI:10.11949/0438-1157.20190203
亚临界和超临界压力下液态正癸烷比定压热容实验研究
Experimental study on isobaric specific heat capacity of liquid n-decane at subcritical and supercritical pressures
摘要
Abstract
In order to accurately measure the isobaric specific heat capacity of liquid n-decane, a flow adiabatic calorimeter was constructed for subcritical pressure and supercritical pressure. The isobaric specific heat capacity of n-decane was measured at temperatures ranging from 311 K to 570 K and pressures ranging from 0.12 MPa to 6.02 MPa. The results show that the isobaric specific heat capacity of n-decane increases as the temperatures rise. And the system pressures have little effects on the isobaric specific heat capacity of n-decane. The experimental results were compared with the reference data. The results show that the maximum absolute deviation (MAD) is within 5.0%, and the average absolute deviation (AAD) is below 1.39%. Meanwhile, the experimental results were compared with Guseinov and Garg models. Based on the two empirical models, the improved isobaric specific heat capacity model was proposed. The improved model has higher fitting accuracy, showing that the MAD is 1.32%, and the AAD is 0.53%, which provides a basis and reference for the calculation of isobaric specific heat capacity of other hydrocarbon fuels.关键词
亚临界压力/超临界压力/比定压热容/绝热量热法/正癸烷Key words
subcritical pressure/supercritical pressure/isobaric specific heat capacity/adiabatic calorimetry/n-decane分类
能源科技引用本文复制引用
王瑞欣,郭亚军,冯松,毕勤成..亚临界和超临界压力下液态正癸烷比定压热容实验研究[J].化工学报,2019,70(9):3238-3247,10.基金项目
国家自然科学基金项目(51776167) （51776167）
