化工学报2019，Vol.70Issue(z2)：20-24,5.DOI:10.11949/0438-1157.20190501
一种比定容热容测量装置
Apparatus for isochoric specific heat capacity measurement
摘要
Abstract
As one of the most important thermodynamic properties, isochoric specific heat capacity is related to the calculation of internal energy and entropy, is the key parameter of engineering design. What is more, isochoric specific heat capacity is derived by the second derivative of pressure with respect to temperature and is important for verifying the accuracy of equation of state. An adiabatic calorimeter was developed to measure the isochoric specific heat capacity. A spherical bomb with platinum resistance thermometer inserted was used to hold the measured liquid. The cooling capacity was provided by a mixed-refrigerant Joule-Thomson refrigerator. In view of the difficult problem of heat insulation in a wide temperature range, two adiabatic shields were arranged and the PID temperature control method was designed independently to reduce the temperature difference between the bomb and the adiabatic shield. The temperature difference between the bomb and the inner adiabatic shield was less than 0.2 K throughout the experiment. In order to verify the reliability of the experimental setup, the isochoric specific heat capacity data of isobutane were measured over temperatures from 279.10 K to 323.68 K. Satisfactory agreement with published heat capacity data is found and the average absolute relative deviation between this data and the values calculated from REFPROP 9.1 is 0.88%.关键词
比定容热容/热力学性质/绝热量热计/辐射/异丁烷/压缩液体/状态方程Key words
isochoric specific heat capacity/ thermodynamic property/ adiabatic calorimeter/ radiation/ isobutane/compressed liquid/ equation of state分类
能源科技引用本文复制引用
钟权,董学强,赵延兴,王敬洲,张海洋,沈俊,公茂琼..一种比定容热容测量装置[J].化工学报,2019,70(z2):20-24,5.基金项目
国家重点研发计划项目(2018YFB0904400) （2018YFB0904400）
国家自然科学基金项目(51676200) （51676200）
北京市自然科学基金项目(3171002) （3171002）
