Specific Heat of Lubricating Oil

[bigdumbaggie79]

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

 

[magicme]

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

 

[25362]

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.

 

[25362]

For mineral oils, C_p, kJ/(kg.^oC)

C_p = (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 C_p values at 20 deg C:

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