[TRNSYS-users] type 907

[Federica Azzarri S238292]

Hi TRNSYS users,

I need to use type 907 to simulate an Internal Combustion (IC) engine. 
I'm having some problems in the implementation of the efficiency map as 
an external file to this type. I already saw the example 
IC_Engine_Sample_Spreadsheet.xls, but I don't understand the values I 
must insert in the cells regarding two columns: 'Exhaust Heat' and 
'Rejected to Atmosphere'. Is 'Exhaust Heat' the value calculated as the 
exhaust flow rate multiplied by the specific heat of the exhaust gas and 
by the difference between the exit temperature of the exhaust gas and 
the intake air temperature?
What about the value I must insert as 'Rejected to Atmosphere'?

Moreover I noticed that all the values required in the efficiency map 
refer to a certain air intake temperature and that in the examples it is 
specified more than one intake air temperature inside of the map. The 
datasheet of my IC engine refers to only one value of air intake 
temperature, is it possible to use just one value?

Thanks in advance to anyone will try to help me,
Federica.