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產品名稱：R245fa
HFC-245fa is known as pentafluoropropane and by its chemical name 1,1,1,3,3,-pentafluoropropane. Unlike CFC and HCFC blowing agents formerly used for this purpose, it has no ozone depletion potential and is nearly non-toxic. Although it is intended to remain trapped within the foam insulation, it is practically non biodegradable with a lifetime of 7.2 years when it eventually does escape into the atmosphere. It does have a high GWP of 950 (950 times the global warming effect of CO2)
GENERAL INFORMATION
| ASHRAE # | R-245fa |
| Class | HFC |
| Refrigerant Type | Single Component Fluid |
| Typical Lubricant | Synthetic (P)E, PVE, etc.) |
| Substitutes | CFC-11 |
| Notes | Equipment redesign, ORC heat transfer fluid |
PHYSICAL PROPERTIES
| Chemical Name | Pentafluoropropane |
| Chemical Notation | CF3CH2CHF2 |
| Molecular Weight (lbm/lbmol) | 134 |
| Boiling Point @ 1 Atm, (°F) | 58.8 |
| Freezing Point @ 1 Atm, (°F) | -160 |
| Critical Temperature (°F) (ASTM D-1321) | 309.29 |
| Critical Pressure* (psia) | 527.94 |
| Saturated Liquid Density @ 86°F, (lb/ft3) | 82.7 |
| Specific Heat of Liquid @ 86°F, (Btu/lb•°F) | 0.32 |
| Specific Heat of Vapor @ Constant Pressure* (Cp), @ 86° and 1 Atm, (Btu/lb•°F) | 0.2 |
| Flammable range, %vol. in air (Based on ASHRAE Standard 34 with Match Ignition) | None |
| ANSI/ASHRAE Standard 34-1992 Safety Group Classification | B1 |
