杜邦R407C（SUVA 407C）環(huán)保制冷劑 DuPont R407C Refrigerant

有關(guān)R407C（SUVA 407C）制冷劑
R407C制冷劑是一款由HFC類物質(zhì)組成混配制冷劑，不含任何破壞臭氧層的物質(zhì)，其ODP值為零。R407C的性能與R22非常接近，可的利用現(xiàn)有R22系統(tǒng)的設(shè)計(jì)，替換冷媒時(shí)只需對(duì)少量的部件進(jìn)行更換或調(diào)整。由于R407C為非共沸制冷劑，相變進(jìn)程存在較大的溫度滑移，因此不能采用滿液式換熱器作為蒸發(fā)器，并且在售后維修再補(bǔ)充過(guò)程中，在某些情況下，可能需要排掉系統(tǒng)中剩余的制冷劑然后再重新加注；同時(shí)為了保證制冷劑的成分不發(fā)生改變，R407C必須以液態(tài)形式充注。R407C是家用空調(diào)中R22制冷劑的過(guò)渡性替代品。

R407C（SUVA 407C）制冷劑的主要應(yīng)用
R407C 主要應(yīng)用于家用空調(diào)、中小型中央空調(diào)、機(jī)房空調(diào)、除溫機(jī)、汽車空調(diào)、船用空調(diào)等。

R407C（SUVA 407C）制冷劑的用油參考
絕大多數(shù)壓縮機(jī)生產(chǎn)商建議使用多元醇酯POE（Polyol Ester）冷凍機(jī)油。

R407C（SUVA 407C）制冷劑包裝
包裝：凈重11.35kg/瓶（Net Weight 25lb）；850kg/瓶（要回收包裝鋼瓶）。

表 1 提供了R-407C（SUVA 9000）和R-410A（SUVA 9100）的主要物化性質(zhì)

物理性質(zhì)                                    單位                       R-407C                    R-410A                      R-22
分子量                                        g/mol                     86.2                         72.58                         86.47
25℃下的蒸氣壓力                      Kpa.abs                1174.1                     1652.9                       1043.1
                                                   Psia                       170.29                     239.73                       151.40
沸點(diǎn)（1atm）                             ℃                           -43.56                     -51.53                        -40.80
                                                    ℉                            -46.40                     -60.76                         -41.40
臨界溫度                                     ℃                           86.74                       72.13                          96.24
                                                    ℉                            188.13                     161.83                        205.24
臨界壓力                                      Kpa.abs                 4619.10                  4926.10                      4980.71
                                                    Psia                        669.95                    714.5                          722.39
臨界密度                                     kg/m3                      527.30                   488.90                         524.21
                                                   1b/ft3                       32.92                      30.52                          32.73
25℃下的液體密度                      kg/m3                      1134.0                    1062.4                        1194.68
                                                   1b/ft3                        70.80                      66.32                         74.53
25℃下飽和氣體密度                   kg/m3                      41.98                       65.92                         44.21
                                                   1b/ft3                        2.62                         4.12                           2.76

表 2 列出了R-407C、R-410A、R-22的理論循環(huán)性能

制冷劑                                        R-22                         R-407C                      R-410A
制冷容量                                    1.00                          1.00                           1.45
有效系數(shù)                                    6.43                          6.27                           6.07
壓縮比（率）                             2.66                          2.83                           2.62
壓縮機(jī)釋放溫度 ℃(℉)                 77.3(171.2)              75.1(167.1)                (166.37)
壓縮機(jī)釋放壓力 kpa （Psia）   1662(241.0)              1763(255.6)                 -
溫度滑移                                     0(0)                          4.9(8.9)                       0(0)

注：溫度如下——冷凝器：43.3℃，蒸發(fā)器： 7.2℃，低溫冷卻： 2.8℃，過(guò)熱： 8.3℃。