2008
DOI: 10.1007/s10765-007-0369-6
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Thermodynamic Properties of HFC-236ea

Abstract: The density of gaseous and liquid 1,1,1,2,3,3-hexafluoropropane (HFC-236ea) and the speed of sound in liquid HFC-236ea have been studied by a γ -attenuation technique, an ultrasonic interferometer, and an isochoric piezometer method over the temperature range of 263-423 K at pressures up to 4.05 MPa. The purity of the samples used throughout the measurements is 99.68 mol%. The pressures of the saturated vapor were measured over the same temperature range. The experimental uncertainties of the temperature, pres… Show more

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Cited by 9 publications
(9 citation statements)
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“…In the vapor phase, speed-of-sound measurements of Benedetto et al 4 show deviations of 0.01 %, and those of Zhang et al 66 show deviations of 0.05 %. During the initial development of the equation, only the data of Gruzdev et al 21 and Pires et al 47 were available in the liquid phase, and these data differed by more than 1 %, as shown in Figure 6. In order to resolve this discrepancy, Meier and Kabelac 43 took measurements of the speed of sound with a high-accuracy instrument designed for this specific task.…”
Section: Experimental Data and Comparisons To The Equations Of Statementioning
confidence: 99%
“…In the vapor phase, speed-of-sound measurements of Benedetto et al 4 show deviations of 0.01 %, and those of Zhang et al 66 show deviations of 0.05 %. During the initial development of the equation, only the data of Gruzdev et al 21 and Pires et al 47 were available in the liquid phase, and these data differed by more than 1 %, as shown in Figure 6. In order to resolve this discrepancy, Meier and Kabelac 43 took measurements of the speed of sound with a high-accuracy instrument designed for this specific task.…”
Section: Experimental Data and Comparisons To The Equations Of Statementioning
confidence: 99%
“…С недавнего времени, R236EA используется в качестве рабочей жидкости в системах, работающих по низкотемпературному органическому циклу Ренкина для утилизации низкопотенциальной теплоты. Хотя исследованию R236EA в последнее время посвящено большое число работ [18][19][20][21][22][23][24][25][26], практически все они посвящены изучению свойств этого холодильного агента в регулярной области параметров состояния. Известные публикации об экспериментальных исследованиях свойств хладагента R236EA приведены в табл.…”
unclassified
“…где a i -постоянные коэффициенты; p c -критическое давление; α -критический индекс изохорной теп-лоемкости; Δ -«неасимптотический» критический индекс; n i -массив из натуральных чисел; Поиск коэффициентов уравнения (7) осуществлялся на массиве экспериментальной и расчетной информации [18][19][20][21][22][23][24][25][26][27] путем поиска минимума функционала Ф:…”
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