5 replies to this topic

[infinitys_7th]

My project is to design a heat exchanger to heat kerosene (API 40) from 80 F to 280 F using Dowtherm 4000 at 350 F. I have gotten a lot of physical property information on Dowtherm 4000 from Dow, but kerosene and both fouling resistances are giving me trouble. Ideally, I need:

For kerosene:

Viscosity
Density
Thermal Conductivity
Heat Capacity
Information on fouling resistance

For Dowtherm, I really just need fouling information (which was not really provided in the literature I received from Dow, except in mentioning maintenance).

I have looked up information on the fouling resistances and found that there are no correlations for them.

Any help would be greatly appreciated.

[Art Montemayor]

Infinity:

We can help. But please help us help you. Tell us what you have done to look for the physical properties you are searching for. Where have you looked? Don't make us go through the same circles.

If you are using clean, filtered Dowtherm and Kerosene, then you shouldn't have any fouling to worry about. Do you expect fouling? Explain why, if you do.

[infinitys_7th]

Part of the reason I expect fouling is because my professor told us to include it in our calculations. However, from the Dowtherm 4000 information I have it looks like there will be little fouling because of the inhibitors in the fluid. For kerosene, fouling looks to be more of an issue.

I forgot to mention in my initial post that this is API 40 kerosene. For kerosene, I really do not know where to begin. I started by simply googling it, and only found values for kerosene at specific temperatures, not charts for temperature. I actually found a post on this forum from someone in my class (different values for required cooling, but the same overall project) who had their question answered partly:

http://www.cheresour...?showtopic=5564

However, there is nothing helpful there, either. We do not have access to equipment for testing.

I have also tried looking up the values in various texts at my library (McGraw-Hill Chemical Properties Handbook, and Perry's Chemical Engineer's Handbook for fouling at the suggestion of Dow's literature) and using physical property databases my university has access to (Knovel, CRC). Perry's suggested using Tubular Exchanger Manufacturers Organization Standards for fouling data, but my library does not have it.

[omarax]

hi infinitys
i will provide a solution for your problem concerning kerosene but i don't know about its accuracy... i have data about kerosene physical properties but at different temperatures so i will post them and may be you can get a correlation from a plot of each physical property at different temperatures....

@ 210 C
viscosity: 0.21 cP
sp. gravity: 0.642
thermal cond.: 0.087 Kcal/h.m.C
spec heat: 0.662 Kcal/kg. C

@ 55 C
viscosity: 0.8 cP
sp. gravity: 0.765
thermal cond.: 0.106 Kcal/h.m.C
spec heat: 0.523 Kcal/kg. C

@ 38 C
viscosity: 1 cP
sp. gravity: 0.776
thermal cond.: 0.108 Kcal/h.m.C
spec heat: 0.505 Kcal/kg. C

Kerosene fouling:
0.0002 m^2.h.C/kCal

Note: i am not sure that this data is for Kerosene API 40

[Anandh kumar C]

Hi i m Anandh kumar working as process Engr...
Production of liquid sulfur Di oxide from sulfur... From that i want general production design with flow sheet, energy balance,material balance and all details abt sulfur Di oxide

pl send to my mail
anandhkumar70@yahoo.com

[srfish]

Hi,

You can also find all of the physical propeties except heat capacity in the engineering data book of GPSA. It is in volume II.

Some older references are:
Data Book on Hydrocarbons by Maxwell
Petroleum Refinery Engineering by Nelson