Thermodynamics lab: Heat Engine Examination

[CptJackWest]

Homework Statement

Calculate the Power, Efficiency, air to fuel ratio.

torque-3.809Nm
speed-3137.207 l/min
T1 Temperature Exhaust=412.598degC
T2 Temperature Ambient=19.141degC
T3 Temperature Fuel=18.994degC
dv/dt Volumetric Flow Air=109.954 l/min
p fuel Fuel Pressure= 21.475 mbar
calorific value of fuel= 435kj/kg

The only thing I am not sure on is how to calculate the mass flow rate of the fuel.
no formula is given, but tried Q=m(T2-T1) but I don't know Q. any help or tips would be great.
Cheers
Jack

 

[SteamKing]

You have speed as 3137.207 l/min. Speed of what? Are these units correct?

 

[CptJackWest]

Thanks for helping.
This problem is from an experiment we did involving an engine.The speed was to stated but I am taking it as the speed of the shaft in the engine. That units that i wrote is what is the data sheet I was given. I did not like the look of them either, but I am now assuming that it in meters per minute.

 

[SteamKing]

If you measured the speed of an operating engine with a tachometer, then 3137 is more likely measured in revolutions per minute (RPM).

 

[CptJackWest]

Thanks for the help, my teacher ended up explaining the whole thing to me and it is now a lot clearer. The speed was not the speed but the mass flow rate in litres per min.
Thanks a lot for trying to help.
cheers