Heavy Fuel Oil Thermal Prpoerties
Heavy Fuel Oil Thermal Prpoerties
(OP)
I am currently checking the steam requirement for an existing suction heater, however I am having trouble finding the thermal properties of the oil ie specific heat capacity, heat transfer coefficient and maximum heat flux at the various temperatures. Does any one know where I can get this information.
RE: Heavy Fuel Oil Thermal Prpoerties
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RE: Heavy Fuel Oil Thermal Prpoerties
RE: Heavy Fuel Oil Thermal Prpoerties
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Appearance: Black
Physical State: Viscous liquid
Odor: Heavy petroleum; asphalt-like
pH: Not applicable
Vapor Pressure (mm Hg): Negligible @ 100°F
Vapor Density (air=1): >1
Boiling Point/Range: >350°F / >177°C
Freezing/Melting Point: No Data
Solubility in Water: Negligible
Specific Gravity: 0.991
Evaporation Rate (nBuAc=1): <1
Viscosity: 205 SUS @ 122°F (50°C)
Bulk Density: 8.25 lbs/gal
Flash Point: 150°F / 66°C minimum (PMCC)
LEL: 0.5 / UEL: 7.0 Flammable/Explosive Limits (%):
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Specific Heat (based on 0.991 SG) should be 0.79 Btu/h/ft2/(Fº in)
Caragoe Equation gives Adiabatic Bulk modulus of 323000 psi
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RE: Heavy Fuel Oil Thermal Prpoerties
“No. 6 fuel oil, sometimes called residual, Bunker C, vacuum bottoms, or reduced crude is produced by many methods, but basically, it is the residue left after most of the light volatile products have been distilled from the crude. It is a very heavy oil, with a viscosity ranging from 900 to 9000 Saybolt Universal Secondary (SUS) at 100°F. Thus it can be used only in installations with heated storage tanks and with a recirculating piping return back to the tank in order to circulate hot oil at the burner front for correct atomisation. No. 6 oil essentially is a refinery by-product.
Due to the demand of low sulphur content and low fuel bound nitrogen fuel oil to meet the stringent limits dictated by the environmental protection agency regulations, light distillates with characteristics as having low sulphur content and low fuel bound nitrogen are blended with high sulphur and high fuel bound nitrogen residue to produce an improved fuel. However, blending light distillate oils with heavy #6 influence other properties of oil. For example, API gravity, heating value per gallon of oil; viscosity, and the ash content as well as the emissions.”
luis
RE: Heavy Fuel Oil Thermal Prpoerties
RE: Heavy Fuel Oil Thermal Prpoerties
The units given by BigInch apparently correspond to thermal conductivity, not HTC.
To convert to W/(m.K) multiply Btu/[ft2.hr(oF/in)] by 0.1442.
RE: Heavy Fuel Oil Thermal Prpoerties
25362 is right, I gave you the heat conductivity. Appologies.
Specific Heat is = 0.46 Btu/lbm-F
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RE: Heavy Fuel Oil Thermal Prpoerties
Regards
Crossbow
RE: Heavy Fuel Oil Thermal Prpoerties
Please note that the Pr number = Cp.μ/κ changes a lot with temperature. An engine oil, for example, would change its Pr from, say, 10,000 at 20oC to about 100 at 150oC mainly due to the viscosity factor μ.
RE: Heavy Fuel Oil Thermal Prpoerties
RE: Heavy Fuel Oil Thermal Prpoerties
See also, the theory of calculation of various properties,
http://thermo.korea.ac.kr/
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RE: Heavy Fuel Oil Thermal Prpoerties
For a ballpark estimate, a fuel having 180 cSt at 50oC would have ~300 cSt at 40oC and ~20 cSt at 100oC.
If you have a visc./temp. chart, and assuming you are far away from the fuel's pour point, an extrapolation to 20oC would give about 1500 cSt.
RE: Heavy Fuel Oil Thermal Prpoerties
Evidently, BigInch's message and mine were almost simultaneous.
RE: Heavy Fuel Oil Thermal Prpoerties
Thank you for your help.
RE: Heavy Fuel Oil Thermal Prpoerties
JMW
www.ViscoAnalyser.com
RE: Heavy Fuel Oil Thermal Prpoerties
In your post on 6th Sep you mention the Caragoe equation for calculating bulk modulus. I googled it but it only returned this website.
Can you give me some more info on this?
Thanks
STH
RE: Heavy Fuel Oil Thermal Prpoerties
Bulk_Modulus_PSI = 100000*EXP(1.9947-0.00013427*TF-0.79392/SG^2-0.002326*TF/SG^2)
TF = Temperature ºF = Temperature of SG measurement (usually 60ºF)
SG = Specific Gravity
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