摘要
1-1-二氟乙烷(R152a)对大气臭氧层没有破坏作用,是制冷剂R12(二氟二氯甲烷)的有希望的替代物之一。本文在流动式高压气体比热实验台上测量了R152a气体的定压比热。温度范围为313～353 K,压力范围为0.4～2.3 MPa。为检验实验装置的可靠性和准确度,测定了R22气体的定压比热,经与文献值比较,测量偏差小于0.4％。本文还应用统计热力学中的微扰理论对所测范围内的测量点进行了比热的理论计算,计算结果与本文实验值的平均相对偏差为1.42％。
R152a is harmless to the ozone layer and is one of the hopeful substitutes of R12. In this work, the c_p of 1,1-difluoroethane (HFC152a) vapor was measured at temperatures from 313 to 353 K, pressures from 0.4 to 2.3MPa with the flow apparatus for measuring heat capacity of gases. The apparatus has been verified with the typical measurement of R22 which shows that the error of c_p measurement is less than 0. 4%. The c_p of R152a was also calculated with a new method derived from the perturbation theory of statistical thermodynamics, the average error of calculation results compared with experimental data is 1.42% in the investigated range.
出处
《高校化学工程学报》
EI
CAS
CSCD
1992年第4期290-296,共7页
Journal of Chemical Engineering of Chinese Universities
基金
国家自然科学基金
关键词
二氟乙烷
制冷剂
定压比热
Specific heat at constant pressure, Perturbation theory, Substitutes
