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Mechanical EngineeringQ&A LibraryAn air-standard dual cycle has a compression ratio of 9.1 and displacement of Vd = 2.2 L. At the beginning of compression, p1 = 95 kPa, and T1 = 290 K. The heat addition is 4.5 kJ, with one quarter added at constant volume and the rest added at constant pressure. Determine:a) each of the unknown temperatures at the various states, in K.b) the net work of the cycle, in kJ.c) the power developed at 3000 cycles per minute, in kW.d) the thermal efficiency.e) the mean effective pressure, in kPa.Question

Asked Jul 7, 2019

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An air-standard dual cycle has a compression ratio of 9.1 and displacement of *V*_{d}_{ }= 2.2 L. At the beginning of compression, *p*_{1 }= 95 kPa, and *T*_{1} = 290 K. The heat addition is 4.5 kJ, with one quarter added at constant volume and the rest added at constant pressure. Determine:

a) each of the unknown temperatures at the various states, in K.

b) the net work of the cycle, in kJ.

c) the power developed at 3000 cycles per minute, in kW.

d) the thermal efficiency.

e) the mean effective pressure, in kPa.

Step 1

Part(a).

Given:

Compression ratio = 9.1

V_{d} = 2.2L

P_{1 }= 95kPa

T_{1 }= 290K

Q_{total} = 4.5kJ

Step 2

Solution:

T_{1}=290K

T_{2}=701.51K

T_{3}=1423.6K

T_{4}=2971.8K

T_{5}=1561.9K

Step 3

Part (b):

Net work of the c...

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