Fluorocarbon C3F8 Properties. Table of Contents
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1 Fluorocarbon C3F8 Properties (octafluoropropane R218) Table of Contents 1. C3F Saturation line curve for C 3 F logp-h diagram for C 3 F Extended logp-h diagram for C 3 F Table of Saturation properties for C3F Saturation properties by 3M Company Properties of the superheated vapor of the C 3 F Densities [with extended pressure range down to 0.7 bar a ] Specicic heat [with extended pressure range down to 0.7 bar a ] Enthalpy Entropy Thermal conductivity Viscosity Extented Properties of the superheated vapor of the C 3 F Density Specific heat Enthalpy Entropy Thermal conductivity Viscosity Properties of the sub-cooled liquid of the C 3 F Density Specicic heat Enthalpy Entropy Thermal conductivity Viscosity Compatibility of fluorocarbons with materials...33
2 1. C3F8 Some selected thermophysical properties of the C 3 F 8 Fluorocarbon Chem.formula Mean Mol.Wt. 188 Boiling atm [ C] -37 Dens.[g/cm3] Liquid DynamicViscosity [10-3 Pa.s] PF5030 C3F8 C C Liquid Kinematic Viscosity [10-6 m 2 /s] 20 C Surface Tens.[dy/cm] Vapor press.@-10 C [Torr] [bara] Latent Heat Vap. [J/mole] [kj/kg] C Specific Heat [kj/kg.k] 1.05 Thermal conductivity [W/m.K] Liquid Vol. Flow (90 W load) [cm3/s] ~0.8 Gas Vol. Flow (90 W load) [cm3/s] ~50 Liquid-Gas Expansion -10 C ~60 DeltaP max for DeltaT=0.5 C [mbar] ~50
3 1.1 Saturation line curve for C 3 F 8 P - T Diagram for C3F8 Pressure [bar] 100 Pressure [bar] Poly. (Pressure [bar]) 10 1 y = 2E-08x 4 + 9E-06x x x Temperature [C]
4 1.2 logp-h diagram for C3F8
5 1.3 Extended logp-h diagram for C3F8
6 1.4 Table of Saturation properties for C3F8 C3F8 Saturation Properties between -40 and + 45 C By Vic Vacek, March 1999 PAGE1 Temp Pres Dens (L) Dens (V) Enth (L) Enth (V) Entr (L) Entr (V) Cp (L) Cp (V) SoS (L) SoS (V) Visc (L) Visc (V) Th C (L) Th C (V) [C] [bar] [kg/m^3] [kg/m^3] [kj/kg] [kj/kg] [kj/k-kg] [kj/k-kg] [kj/k-kg] [kj/k-kg] [m/s] [m/s] [µpa-s] [µpa-s] [W/m-K] [W/m-K]
7 Table of Saturation properties for C3F8 [continues] C3F8 Saturation Properties between -40 and + 45 C By Vic Vacek, March 1999 Temp Pres Dens (L) Dens (V) Enth (L) Enth (V) Entr (L) Entr (V) Cp (L) Cp (V) SoS (L) SoS (V) Visc (L) Visc (V) Th C (L) [C] [bar] [kg/m^3] [kg/m^3] [kj/kg] [kj/kg] [kj/k-kg] [kj/k-kg] [kj/k-kg] [kj/k-kg] [m/s] [m/s] [µpa-s] [µpa-s] [W/m-K] Reference state values according IIR
8 1.5 Saturation properties by 3M Company TABLE - Saturated Properties of PF C3F8 3M Data, digtalized by Vic Vacek; February 1999 at CERN Page1 T Tr Pvp Pr ρ (L) ρ (V) Vmol (L) Vmol (V) U (L) U (V) H (L) Hvap H (V) S (L) Svap S (V) [K] [-] [bar] [-] [kg/m^3] [kg/m^3] [L/mol] [L/mol] [kj/mol] [kj/mol] [kj/mol] [kj/mol] [kj/mol] [J/mol K] [J/mol K] [J/mol K]
9 TABLE - Saturated Properties of PF C3F8 3M Data, digtalized by Vic Vacek; February 1999 at CERN Page2 T Tr Pvp Pr ρ (L) ρ (V) Vmol (L) Vmol (V) U (L) U (V) H (L) Hvap H (V) S (L) Svap S (V) [K] [-] [bar] [-] [kg/m^3] [kg/m^3] [L/mol] [L/mol] [kj/mol] [kj/mol] [kj/mol] [kj/mol] [kj/mol] [J/mol K] [J/mol K] [J/mol K]
10 TABLE - Saturated Properties of PF C3F8 3M Data, digtalized by Vic Vacek; February 1999 at CERN Page3 T Tr Pvp Pr ρ (L) ρ (V) Vmol (L) Vmol (V) U (L) U (V) H (L) Hvap H (V) S (L) Svap S (V) [K] [-] [bar] [-] [kg/m^3] [kg/m^3] [L/mol] [L/mol] [kj/mol] [kj/mol] [kj/mol] [kj/mol] [kj/mol] [J/mol K] [J/mol K] [J/mol K] REFERENCE: Pure liquid at 180 K SYMBOLS AND UNITS: Pvp = v.p. [bar]; ρ = density [kg/m^3]; V = molar volume [L/mol]; U = int. energy [kj/mol]; H = enthalpy [kj/mol]; S entropy [J/mol.K]; = latent quantity (difference between sat. L and sat. V)
11 1.6 Properties of the superheated vapor of the C 3 F 8 in the pressure range between 1 and 20 bar a and temperature range between 35 ºC and 60 ºC Densities [with extended pressure range down to 0.7 bar a ]
12
13 1.6.2 Specicic heat [with extended pressure range down to 0.7 bar a ]
14
15 1.6.3 Enthalpy
16
17 1.6.4 Entropy
18 1.6.5 Thermal conductivity
19 1.6.6 Viscosity
20 1.7 Extented Properties of the superheated vapor of the C 3 F 8 in the extended pressure range between 15 and 20 bar a and extended temperature range between 40 ºC and 100 ºC Density
21 1.7.2 Specific heat
22 1.7.3 Enthalpy
23 1.7.4 Entropy
24 1.7.5 Thermal conductivity
25 1.7.6 Viscosity
26 1.8 Properties of the sub-cooled liquid of the C 3 F 8 in the pressure range between 1 and 18 bar a and temperature range between 30 ºC and 50 ºC Density
27 1.8.2 Specicic heat
28 1.8.3 Enthalpy
29 1.8.4 Entropy
30 1.8.5 Thermal conductivity
31 1.8.6 Viscosity
32
33 1.9 Compatibility of fluorocarbons with materials Communicated by Lionel Breuilly - 3M FRANCE 3M and various materials manufacturers have been contacted regarding their compatibility with Fluorinert: GOOD Acrylic (Acrylite / Acrysteel / Aristech / Cyrolite / Diakon / Kamax) *possible Buna-N - Nitrile rubber (NBR=Acrylonitrile butadiene rubber - Perbunan-NT / Hycar / Butacril / Chemigum / Isr-N / Stansolv / Sol-Vex) *good Nalgene - Polyurethane (PU/PUR=Polyurethane rubber - Vulkollan / Adiprene) *possible Neoprene W (CR=Polychloroprene rubber - Baypren / Neox / Stanzoil) *prohibited Silicone (SIR=Silicone rubber - Silastic) *possible BAD Nylon (PA=Polyamid - Stanyl / Capron / Ultramid / Maranyl / Zytel / Orgamid / Grilon / Rilsan / Reny / Vestamid) *possible Polypropylene (PP=Polypropylene - Celmar / Coprax / Giacogreen / Hostelen PP / Novolen / Appryl / Lacqtene / Propathene / Ektar FB / Fortilene / Marlex / Polyfine / Pro-Fax / Tenite) *possible PVC (PVC=Polyvinyl chloride - Betaglas / Darvic / Fiberlok / Trovidur / Hostalit / Vestolit / Tygon) *prohibited Teflon (PTFE=Polytetrafluoroethylene - Flubriflon / Fluon / Teflon TFE / Valflon F / Hostaflon TF / Furon / Gortex / Tfm / Rulon) *prohibited Tygon (PVC) *prohibited Viton (FKM=Fluoroelastomer - Fluorel) *prohibited (from our test) EPDM (Ethylene propylene rubber - Keltan / Nordel / Vistalon / Buna-AP / Pyrofil) *possible *CERN IS 41 classification regarding fire
34 C 6 F 14 - PIPING Rad Hard 1 Compatibility 2 Px10 10 (cm 3 mm/cm 2 s cm Hg) Gas Permeability (DATA: Angst+Pfister) GLOBAL RESULT SS Aluminum 1.10 OK 1.11 OK OK (if fluid is pure) 1.12 OK Not well know if fluid is contaminated with H 2 O, O 2, C-H due to F-production 0 OK 0 OK? PEEK rad 1.14 OK (Data: TIS-CFM/MTR/96-17) PUR 10 7 rad (Data: Angst+Pfister) 1.15 OK (Data: 3M) (Data: 3M) 5 N O CO 2 OK OK Polypropylene PP 10 7 rad (Data: Angst+Pfister) 3-5 N 2 ~10 O 2 ~ 35 CO 2? See Note Polyethylene PE Nylon (Polyamide 6) Rilsan (polyamide 11) 10 8 rad (Data: CERN 82-10) 1.16 OK (Data: DELPHI RICH 66) 10 7 rad (Data: CERN 82-10) 1.17 OK (Data: 3M) OK (Data: 3M) Discolaration, Weight loss, but mechanical prop. OK (Data: DELPHI RICH 66) 0.1 N 2 ~ 1 O CO 2 8 H 2 ~ 2 N 2 ~ 1 O CO 2 8 H 2 OK OK BAD Teflon (PTFE) PVC 1.18 BAD 1.19 BAD 10 8 rad (Data: Angst+Pfister) 1.20 Some effect (Data: 3M) 0.3 N 2 ~ 1 O CO 2 33 H 2 Note: one should avoid plastics with the fluorocarbons as they take out the plastiziser and the product becomes brittle. Source: G. Lenzem, DELPHI RICH and 3M. BAD BAD 1 BAD means that material does not show any damage up to the indicated dose. BAD means that it is affected well below 10 5 rad. 2 Effect means change of weight and/or volume after > 72h immersion in C 6 F 14. Some effect means > 1%. BAD means >4%.
35 C6F14 - O-rings How much weight/volume loss/increase is acceptable? SOME EFFECT means > 1%. BAD means > 4%. Suggested by 3M as best choices EPDM Perbunan (NBR) or caoutchouc or nitrile rubber 2. PVDF Neoprene Butyl rubber Kalrez Rad Hard < 10 8 rad (Data: CERN 82-10) 10 8 rad (Data: CERN 82-10) 10 7 rad (Data: CERN 82-10) < 10 5 rad (Data: CERN 82-10) 10 8 rad (Data: Angst+Pfister) 10 6 rad (Data: CERN Compatibility OK (Data: 3M) OK (but some effect) (Data: 3M) OK (Data: 3M) OK (Data: 3M) OK (but some effect) (Data: 3M) GLOBAL RESULT OK OK OK BAD < 10 7 rad Viton BAD BAD (Data: CERN 82-10) (Data: 3M) * Teflon (PTFE & PCTFE) BAD BAD BAD OK * Viton O-rings were used in DELPHI with no leak problems. Source: G. Lenzem, DELPHI RICH
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