1- An Otto cycle has non-isentropic content and expansionprocesses. Otto cycle display ratio is 6, isentropic efficiency85% and isentropic expansion efficiency 90%. At thebeginning of the compression process, the air has a pressureof 101.3 kPa and a temperature of 25 ° C. The maximumtemperature of the cycle can be taken as 1300 K and possible4 MPa. (The thermal source temperature is 2000 K and thedead state temperature is 293.15 K).a) Draw the T (K) - s (kJ / kgK) diagram to include isentropicand non-isentropic curves.b) Under the room supply constant specific heats approach,find the heat available [kJ / kg] and the net work output as [kJ/ kg].c) Find the heat use as [kJ / kg] and the net work output as[kJ / kg] under the variable specific heats approximation.d) Calculating the exergy destruction in [kJ / kg] for theexpansion process under variable specific heats approach.e) Find the energy and exergy efficiencies in [%] for the roomsupply constant specific heats approach cycle.f) Find the energy and exergy efficiencies for the cycle underwww dvariable specific heats approach as [%].

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cycle has nön expansion processes. Otto cycle display ratio is 6, isentropic efficiency 85% and isentropic expansion efficiency 90%. At the beginning of the compression process, the air has a pressure of 101.3 kPa and a temperature of 25 ° C. The maximum temperature of the cycle can be taken as 1300 K and possible 4 MPa. (The thermal source temperature is 2000 K and the dead state temperature is 293.15 K). www

cycle has nön expansion processes. Otto cycle display ratio is 6, isentropic efficiency 85% and isentropic expansion efficiency 90%. At the beginning of the compression process, the air has a pressure of 101.3 kPa and a temperature of 25 ° C. The maximum temperature of the cycle can be taken as 1300 K and possible 4 MPa. (The thermal source temperature is 2000 K and the dead state temperature is 293.15 K). www

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

1- An Otto cycle has non-isentropic content and expansion
processes. Otto cycle display ratio is 6, isentropic efficiency
85% and isentropic expansion efficiency 90%. At the
beginning of the compression process, the air has a pressure
of 101.3 kPa and a temperature of 25 ° C. The maximum
temperature of the cycle can be taken as 1300 K and possible
4 MPa. (The thermal source temperature is 2000 K and the
dead state temperature is 293.15 K).
a) Draw the T (K) - s (kJ / kgK) diagram to include isentropic
and non-isentropic curves.
b) Under the room supply constant specific heats approach,
find the heat available [kJ / kg] and the net work output as [kJ
/ kg].
c) Find the heat use as [kJ / kg] and the net work output as
[kJ / kg] under the variable specific heats approximation.
d) Calculating the exergy destruction in [kJ / kg] for the
expansion process under variable specific heats approach.
e) Find the energy and exergy efficiencies in [%] for the room
supply constant specific heats approach cycle.
f) Find the energy and exergy efficiencies for the cycle under
www d
variable specific heats approach as [%].

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