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Specific Heat of Lubricating Oil

Specific Heat of Lubricating Oil

Specific Heat of Lubricating Oil

(OP)
writing a program for cooling of lubricating oil used in natural gas engines and compressors.  Any web site showing the specific heat as a function of viscousity and temperature?
thanks

RE: Specific Heat of Lubricating Oil

hi
the back of any heat transfer book has to have an appendix of fluid properties as functions of temperature.
but, that aside ...light oil at 150F , Cp = .48 BTU/lbm/F (per Kreith, Table A-3)

daveleo

RE: Specific Heat of Lubricating Oil

Heat Transfer by J.P.Holman, Table A-4, gives for an unused engine oil the following data:

t,oC              Cp, kJ/(kg.K)   

0                       1.796         
20                     1.880        
40                     1.964       
60                     2.047
80                     2.131
100                   2.219       
120                   2.307
140                   2.395         
160                   2.483   

It also provide viscosities and othe relevant thermophysical properties.       

RE: Specific Heat of Lubricating Oil

For mineral oils, Cp, kJ/(kg.oC)

Cp = (1.69+0.0034t)d-0.5

where t is in deg C, and d is density of the oil at 20 deg C.

Common Cp values at 20 deg C:

Polyhydric alcohols, 2.43; petroleum oils, 1.88; silicones, 1.47.

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