STUDY ON THE THERMOPHYSICAL PROPERTIES IN MIXTURES OF NON-CHLORINE HYDROCARBON REFRIGERaNTS

非氯烃类制冷剂混合物的热物理性质研究

• 批准号: 04650854
• 负责人: TAKAGI Toshiharu
• 金额: $ 1.28万
• 依托单位: KYOTO INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04650854/
• 关键词: ALTERNATIVE REFRIGERANT; BINARY MIXTURE; VAPOR PRESSURE; ULTRASONIC SPEED; PVT; 代替フロン

Among hydrochlorofluorocarbons, HCFCls, chlorodifluoromethane, CHCIF_2 (HCFC-22, critical temperature, T_c=369.30 K ; critical pressure, p_c=4.988MPa) is widely used today as working fluidsinair-conditioning and refrigeration technology. The ozone depletion potential, ODP, due to the evolution of HCFCs, is presumed to be the comparatively lower compared with those for chlorofluorocarbons, CFCs. However, wity the use in a large quantity of HCFC-22 including chlorine atom, the various harmful influences giving to the earth environmental are anxious in the near future. Suitable replacement compounds for CHCIF_2 may be trifluoromethane, CHF_3 (HFC-23), difluoromethane, CH_2F_2 (HFC-32), pentafluoroethane CHF_2CF_3 (HFC-125) and 1,1,1,2-tetrafluoroethane, CF_3CH_2F (HFC-134a), which those have nearly the same vapor pressures and critical parameters with those for CHCIF_2, and/or their binary mixtures.In this project, the vapor pressure, ultrasonic speed and density (PVT) in the liquid phase for binary mixtures of CHF_3+CF_3CH_2F and CH_2F_2+CF_3CH_2F were measured along isotherms from 243 to 333 K and at pressures up to about 30MPa. A sing-around technique were used for the measurement of vapor pressure and ultrasonic speed. And the density (PVT) was observed by a direct weighing technique. The temperature, pressure and/or composition variations for these values are found to give a powerful clue to measure the thermophysical properties for each system of binary mixtures. The results obtained in the lower region of CH_2F_2 + CF_3CH_2F system, which indicated the nearly same properties, may be noted as a alternative fluid of chlorodufluoromethane CHCIF_2.

在氢氯氟化合物中，HCFCL，氯二氟甲烷，CHCIF_2（HCFC-22，临界温度，T_C = 369.30 K;临界压力，P_C = 4.988MPA）如今已被广泛用于工作流动性液体结构和拨出技术。由于HCFC的进化，臭氧耗尽电势被认为与氯氟化碳，CFC相比相对较低。然而，智慧在包括氯原子在内的大量HCFC-22中使用，在不久的将来，对地球环境的各种有害影响都焦虑。 Suitable replacement compounds for CHCIF_2 may be trifluoromethane, CHF_3 (HFC-23), difluoromethane, CH_2F_2 (HFC-32), pentafluoroethane CHF_2CF_3 (HFC-125) and 1,1,1,2-tetrafluoroethane, CF_3CH_2F （HFC-134A），这些蒸气压力几乎与CHCIF_2和/或它们的二进制混合物具有相同的蒸气压力和关键参数。在该项目中，在CHF_3+CF_3+CF_3CH_2F WADER的二进制混合物中，蒸气压力，超声速度和密度（PVT）以及液相的液相相位243， 333 K，压力大约30MPA。使用一种唱片技术来测量蒸气压力和超声速度。通过直接称重技术观察到密度（PVT）。发现这些值的温度，压力和/或组成变化为测量每个二元混合系统的热物理特性提供了强大的线索。在CH_2F_2 + CF_3CH_2F系统的较低区域中获得的结果，该系统表明几乎相同的特性，可以将其视为氯氟甲烷CHCIF_2的替代流体。

项目成果

Kenji Mishima: "Bubble point pressures fro chlorodifluoromethane+1,2-dichloro-1,1,2,2-tetrafluoroethane" Journal of Chemical and Engineering Data. 38. 49-52 (1993)

Kenji Mishima：“一氯二氟甲烷 1,2-二氯-1,1,2,2-四氟乙烷的泡点压力”《化学与工程数据杂志》。

T.TAKAGI: "ULTRASONIC SPEED IN LIQUID 1,1-DICHLORO-1-TRIFLUOROETHANE AT TEMPERATURES FROM 283 TO 373K AND UP TO 75MPA" J.CHEM.ENG.DATA. 38. 60-62 (1993)

T.TAKAGI：“液体 1,1-二氯-1-三氟乙烷中的超声波速度，温度从 283 到 373K，压力高达 75MPA”J.CHEM.ENG.DATA。

T.TAKAGI: "ULTRASONIC SPEED IN LIQUID DIFLUOROMETHANE UNDER HIGH PRESSURES" HIGH TEMP.-PRES. (inpress).

T.TAKAGI：“高压下液态二氟甲烷的超声波速度”

Kenji Mishima: "Bubble point pressures for chlorodifluoromethane+1,2-dichloro-1,1,2,2-tetrafluoroethane,bromotrifluoromethane+1,2,dichloro1,1,2,2-tetrafluoroethane,and---." Journal of Chemical and Engineering Data. 38. 49-52 (1993)

Kenji Mishima：“氯二氟甲烷 1,2-二氯-1,1,2,2-四氟乙烷、溴三氟甲烷 1,2、二氯 1,1,2,2-四氟乙烷和---的泡点压力。”

Toshiharu Takagi: "Ultrasonic spedds in liquid difluoromethane under high pressures" High Temperatures High Pressures. (発表予定). (1994)

Toshiharu Takagi：“高压下液态二氟甲烷的超声波加速”（高温高压）（即将发表）。