HFO R-1234yf la se frijent la nan tan kap vini an. Oswa, omwen, se sa ki jan li te maket. Yf te refrijerasyon an premye HFO yo we atansyon endikap. Yon kek ane tounen te gen anpil presyon nan Inyon Ewopeyen an yo sispann le li sevi avek HFC R-134a pou otomobil kondisyone. Te presyon an te gen akoz potansyel la tre wo Global chofaj (GWP) ki R-134a gen. R-134a gen yon GWP nan yon sel-mil kat san ak trant. Li se klase kom yon polyan Super.
Repons lan nan pwoblem nan mond lan te vini ak anonsman an nan nouvo HFO refrijerant la li te ye tankou R-1234yf. Yf frijent gen yon Potansyel chofaj Global nan selman kat. Sa se yon gwo diferans le yo konpare li bay lot refrijerans sou mache a jodi a. Inisyasyon an selman pou yf se ke li se rated kom yon ti kras flanmable oswa 2L soti nan ASHRAE ak lot oganizasyon kondisyone.
Inyon Ewopeyen an byen vit fase desann ak soti R-134a e yo te gen nouvo machin yo komanse pran R-1234yf. Pandan ke akseptasyon an nan yf se pi dousman isit la nan Etazini gen anpil manifaktire machin ki te komanse le li sevi avek sa a frijide nan machin nouvo model yo. Avek chak ane ki pase pi plis ak plis machin komanse pran yf.
1234yf Presyon Tablo
Youn nan etap sa yo tre premye le li rive dyagnostike kondisyone yon veyikil la se konprann tanperati a ak presyon aktyel la ke sistem ou an ap opere nan. Eske ou gen bagay sa yo ansanm akpwen satire,ikol, aksuperheatnimewo pou frijide a ou ap travay sou yo esansyel le li rive vreman konprann ki sa ki pral mal ak sistem ou.
Tablo ki anba a detay presyon yo ak pwen an satire, oswa pwen bouyi, R-1234yf:
| °F | °C | PSI | KPA |
| -94 | -70 | -9.82 | -67.7 |
| -90.4 | -68 | -9.26 | -63.8 |
| -86.8 | -66 | -8.65 | -59.6 |
| -83.2 | -64 | -7.99 | -55.1 |
| -79.6 | -62 | -7.27 | -50.1 |
| -76 | -60 | -6.49 | -44.7 |
| -72.4 | -58 | -5.65 | -39.0 |
| -68.8 | -56 | -4.73 | -32.6 |
| -65.2 | -54 | -3.75 | -25.9 |
| -61.6 | -52 | -2.69 | -18.5 |
| -58 | -50 | -1.55 | -10.7 |
| -54.4 | -48 | -0.33 | -2.3 |
| -50.8 | -46 | 0.99 | 6.8 |
| -47.2 | -44 | 2.39 | 16.5 |
| -43.6 | -42 | 3.89 | 26.8 |
| -40 | -40 | 5.49 | 37.9 |
| -36.4 | -38 | 7.19 | 49.6 |
| -32.8 | -36 | 9.01 | 62.1 |
| -29.2 | -34 | 10.94 | 75.4 |
| -25.6 | -32 | 12.99 | 89.6 |
| -22 | -30 | 15.17 | 104.6 |
| -18.4 | -28 | 17.47 | 120.5 |
| -14.8 | -26 | 19.91 | 137.3 |
| -11.2 | -24 | 22.49 | 155.1 |
| -7.6 | -22 | 25.21 | 173.8 |
| -4 | -20 | 28.08 | 193.6 |
| -0.4 | -18 | 31.11 | 214.5 |
| 3.2 | -16 | 34.29 | 236.4 |
| 6.8 | -14 | 37.64 | 259.5 |
| 10.4 | -12 | 41.17 | 283.9 |
| 14 | -10 | 44.87 | 309.4 |
| 17.6 | -8 | 48.75 | 336.1 |
| 21.2 | -6 | 52.82 | 364.2 |
| 24.8 | -4 | 57.09 | 393.6 |
| 28.4 | -2 | 61.56 | 424.4 |
| 32 | 0 | 66.23 | 456.6 |
| 35.6 | 2 | 71.11 | 490.3 |
| 39.2 | 4 | 76.21 | 525.4 |
| 42.8 | 6 | 81.54 | 562.2 |
| 46.4 | 8 | 87.09 | 600.5 |
| 50 | 10 | 92.89 | 640.5 |
| 53.6 | 12 | 98.92 | 682.0 |
| 57.2 | 14 | 105.21 | 725.4 |
| 60.8 | 16 | 111.75 | 770.5 |
| 64.4 | 18 | 118.55 | 817.4 |
| 68 | 20 | 125.63 | 866.2 |
| 71.6 | 22 | 132.98 | 916.9 |
| 75.2 | 24 | 140.62 | 969.5 |
| 78.8 | 26 | 148.54 | 1024.1 |
| 82.4 | 28 | 156.77 | 1080.9 |
| 86 | 30 | 165.3 | 1139.7 |
| 89.6 | 32 | 174.15 | 1200.7 |
| 93.2 | 34 | 183.32 | 1263.9 |
| 96.8 | 36 | 192.82 | 1329.4 |
| 100.4 | 38 | 202.65 | 1397.2 |
| 104 | 40 | 212.85 | 1467.5 |
| 107.6 | 42 | 223.39 | 1540.2 |
| 111.2 | 44 | 234.29 | 1615.4 |
| 114.8 | 46 | 245.57 | 1693.1 |
| 118.4 | 48 | 257.24 | 1773.6 |
| 122 | 50 | 269.31 | 1856.8 |
| 125.6 | 52 | 281.76 | 1942.7 |
| 129.2 | 54 | 94.75 | 653.3 |
| 132.8 | 56 | 100.09 | 690.1 |
| 136.4 | 58 | 105.62 | 728.2 |
| 140 | 60 | 111.34 | 767.7 |
| 143.6 | 62 | 117.26 | 808.5 |
| 147.2 | 64 | 123.38 | 850.7 |
| 150.8 | 66 | 129.71 | 894.3 |
| 154.4 | 68 | 136.26 | 939.5 |
| 158 | 70 | 143 | 986.0 |
