DOI: https://doi.org/10.15673/0453-8307.2/2015.39352

РІВНЯННЯ ДЛЯ РОЗРАХУНКУ В'ЯЗКОСТІ ТА ТЕПЛОПРОВІДНОСТІ ХОЛОДОАГЕНТУ R134а

А.С. Бойчук

Анотація


Складені рівняння для розрахунку в’язкості та теплопровідності альтернативного холодоагенту R134а через змінні температуру та густину. Коефіцієнти рівнянь визначені методом найменших квадратів по експериментальним даним. Рівняння описують в’язкість в інтервалі температур від 248 до 439 К при тиску до 6,0 МПа та теплопровідність в інтервалі температур від 248 до 533 К при тиску до 60,9 МПа. Точність складених рівнянь цілком прийнятна для інженерних розрахунків.


Ключові слова


Холодоагент – R134а – В’язкість – Теплопровідність – Рівняння.

Повний текст:

PDF (Русский)

Посилання


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Пристатейна бібліографія ГОСТ


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23. Gross U., Song Y.W., Hahne E. Thermal Conductivity of the New Refrigerants R134a, R152a, and R123 Measured by the Transient Hot-Wire Method // Int. J. Thermophysics. – 1992. – V.13. – № 6. – P. 957 – 983. doi: 10.1007/bf01141209

24. Perkins R.A., Laesecke A., Nieto de Castro C.A. Polarized Transient Hot Wire Thermal Conductivity Measurements // Fluid Phase Equilibria. – 1992. – V.80. – P. 275 – 286. doi: 10.1016/0378-3812(92)87074-w

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29. Tsvetkov O.B., Laptev Yu.A., Asambaev A.G.
Thermal Conductivity of Refrigerants R123, R134a, and R125 at Low Temperatures // Int. J. Thermophysics. – 1994. – V.15. – № 2. – P. 203 – 214.doi: 10.1007/bf01441582

30. Tsvetkov O.B., Laptev Yu.A., Asambaev A.G. Experimental study and correlation of the thermal conductivity of 1,1,1,2-tetrafluoroethane (R134a) in the rarefied gas state // Int. J. Refrigeration. – 1995. – V.18. – № 6. – P. 373 – 377.doi: 10.1016/0140-7007(95)98159-i

31. Hammerschmidt U. Thermal Conductivity of a Wide Range of Alternative Refrigerants Measured with an Improved Guarded Hot-Plate Apparatus // Int. J. Thermophysics. – 1995. – V.16. – № 5. – P. 1203 – 1211. doi: 10.1007/bf02081288

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33. Assael M.J., Malamataris N., Karagiannidis L. Measurements of the Thermal Conductivity of Refrigerants in the Vapor Phase // Int. J. Thermophysics. – 1997. – V.18. – № 2. – P. 341 – 352.doi: 10.1007/bf02575165

34. Gurova A.N., Mardolcar U.V., Nieto de Castro C.A. The Thermal Conductivity of Liquid 1,1,1,2-Tetrafluoroethane (HFC 134a) // Int. J. Thermophysics. – 1997. – V.18. – № 5. – P. 1077 – 1087.doi: 10.1007/bf02575250

35. Le Neidre B., Garrabos Y. Measurements of the Thermal Conductivity of HFC-134a in the Temperature Range from 300 to 530 K and at Pressures up to 50 MPa // Int. J. Thermophysics. – 1999. – V.20. – № 5. – P. 1379 – 1401. doi: 10.1023/a:1021480803361

36. Le Neidre B., Garrabos Y., Gumerov F., Sabirzianov A. Measurements of the Thermal Conductivity of HFC-134a in the Supercritical Region // J. Chem. Eng. Data. – 2009. – V.54. – P. 2678 – 2688.doi: 10.1021/je900210h

37. Baginsky A.V., Shipitsyna A.S. Thermal conductivity and thermal diffusivity of the R134a refrigerant in the liquid state // Thermophyics and Aeromechanics. – 2009. – V.16. – № 2. – P. 267 – 273.doi: 10.1134/s0869864309020115