4 replies to this topic

[spectre]

Hi,

 

I've googled around the web looking for the specific heat capacity of propylene glycol on water,

(I've found only the one for the ethylene glycol)

 

 

Can someone tell me where to find a table for the specific heat capacity of propylene glycol on water?

with "on water" I mean the specific heat of the mixture related to the percentage used,

like "at 20% of prop.glycol mixed with water I will have 123456   [btu/lb °F] or [kjoule /kg/1°K]

 

 

thanks in advance,

Enrico

Edited by spectre, 03 March 2014 - 02:53 AM.

[ankur2061]

Enrico,

If you know the specific heat capacity of pure propylene glycol at a given temperature then you can estimate the propylene glycol solution specific heat capacity as follows:

 

Sp heat capacity of a given PG solution = (mol fraction of PG in solution*sp heat capacity of pure PG) + (mol fraction of water in solution*sp. heat capacity H2O)

 

Since sp. heat capacity of liquid water remains the same between 25-100°C, which is 4.18 kJ/kg-K or 1 kcal /kg-°C the formula reduces to:

 

PG solution specific heat (in kcal /kg-°C) = mol fraction PG in soln*Sp heat of pure PG + mol fraction of water

 

or 

 

PG solution specific heat (in KJ//kg-K) = mol fraction PG in soln*Sp heat of pure PG + mol fraction of water*4.18

 

Regards,

Ankur

[spectre]

Thanks Sir,

 

really appreciated

 

Regards

Enrico

[aroon]

Document in the below link can be used as ready graphs are available with respect to temperature.

 

http://www.lyondellb...echlit/2516.pdf

 

Rgds

Aroon

[breizh]

 

 

http://msdssearch.do...fromPage=GetDoc

Google should be your best friend , 

Hope this helps ,

Breizh