9–71 Consider an ideal Ericsson cycle with air as the work- ing fluid executed in a steady-flow system. Air is at 27°C and 120 kPa at the beginning of the isothermal compression pro- cess, during which 150 kJ/kg of heat is rejected. Heat transfer to air occurs at 1200 K. Determine (a) the maximum pressure in the cycle, (b) the net work output per unit mass of air, and (c) the thermal efficiency of the cycle. Answers: (a) 685 kPa, (b) 450 kJ/kg, (c) 75.0 percent

9–71 Consider an ideal Ericsson cycle with air as the work- ing fluid executed in a steady-flow system. Air is at 27°C and 120 kPa at the beginning of the isothermal compression pro- cess, during which 150 kJ/kg of heat is rejected. Heat transfer to air occurs at 1200 K. Determine (a) the maximum pressure in the cycle, (b) the net work output per unit mass of air, and (c) the thermal efficiency of the cycle. Answers: (a) 685 kPa, (b) 450 kJ/kg, (c) 75.0 percent

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

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.

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PLEASE SHOW THE STEP-BY-STEP SOLUTION
ANSWER SHOULD BE: a) 685 kPa, (b) 450 kJ/kg, (c) 75.0 percent

9–71 Consider an ideal Ericsson cycle with air as the work-
ing fluid executed in a steady-flow system. Air is at 27°C and
120 kPa at the beginning of the isothermal compression pro-
cess, during which 150 kJ/kg of heat is rejected. Heat transfer
to air occurs at 1200 K. Determine (a) the maximum pressure
in the cycle, (b) the net work output per unit mass of air, and
(c) the thermal efficiency of the cycle. Answers: (a) 685 kPa,
(b) 450 kJ/kg, (c) 75.0 percent

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