A fuel (H/C=1.78, LHV= 43 MJ/kg, MW=180 kg/kmol) is used to operate a diesel engine at an A/F=17. The fuel and air enter at standard conditions (298K) and the exhaust products exit at 800K. The fuel flow into the engine is 3.6 g/s. The power out is 57 kW.

A fuel (H/C=1.78, LHV= 43 MJ/kg, MW=180 kg/kmol) is used to operate a diesel engine at an A/F=17. The fuel and air enter at standard conditions (298K) and the exhaust products exit at 800K. The fuel flow into the engine is 3.6 g/s. The power out is 57 kW.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

IC engines

The term "engine" indicates a mechanical device/machine used to convert input energy to a specific mechanical output. The input energy may be in the form of chemical energy, thermal energy, or so on and mechanical output is in the form of mechanical energy (work done). Generally, the engines classify into two groups which are internal combustion type and external combustion type, and further, these two types can be classified into two types that are reciprocating and rotary engines.

Question

A fuel (H/C=1.78, LHV= 43 MJ/kg, MW=180 kg/kmol) is used to operate a diesel engine at
an A/F=17. The fuel and air enter at standard conditions (298K) and the exhaust products exit
at 800K. The fuel flow into the engine is 3.6 g/s. The power out is 57 kW.
а)
b)
Find x & y for the thermodynamically representative fuel, CxHy.
Find the fuel's heat of formation.
c)
Assuming complete combustion, find the heat loss from the engine, Q (kW).

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