# 4. An air standard dual (limited pressure) cycle has a CR of 15 and compression begins at 0.1 MPa,40 °C. The maximum pressure is 6 MPa and heat added is 1.675 MJ/kg. Compute235 kJkg1440 kJ/k(a) The heat supplied at v = C per kg of air(b) the heat supplied at p = C per kg of air1 of 31014 k/kg]0.5%(c) the work done per kg of air,(d) the cycle efficiency(e) the temperature at the end of the v = C heating process,(f) the cut-off ratio, andL21 MP(g) the m.e.p. of the cycle.

Question
21 views help_outlineImage Transcriptionclose4. An air standard dual (limited pressure) cycle has a CR of 15 and compression begins at 0.1 MPa, 40 °C. The maximum pressure is 6 MPa and heat added is 1.675 MJ/kg. Compute 235 kJkg 1440 kJ/k (a) The heat supplied at v = C per kg of air (b) the heat supplied at p = C per kg of air 1 of 3 1014 k/kg] 0.5% (c) the work done per kg of air, (d) the cycle efficiency (e) the temperature at the end of the v = C heating process, (f) the cut-off ratio, and L21 MP (g) the m.e.p. of the cycle. fullscreen
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Step 2

Considering process 1-2 help_outlineImage TranscriptioncloseР. J V2 P 0.1x (154 P2 4.43 1Mpa T-313(15) T-924.657k cosidering process 2-3 T T Р, 6 T924.64 4.43 T3 1252.33k fullscreen
Step 3 help_outlineImage Transcriptionclose(4) calculating supplied at constant volume QC, (T,-T;) Q-0.718(1252.36-924.65) Q=235.295kjkg (B) heat suppliedat constant pressure=total heat-heat supplied during 2-3 =1.675x103-235.3 - 1439.7kj/kg considering process 3-4 heat transfer c (T4-T3) 1439.7=1.005(T4-1252.36) T-2685k fullscreen

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