show solution and all steps. thermo 2. first solve with cold air standard, then solve without cold air standard. label part 1 and part 2 9.6 A four-cylinder, four-stroke internal combustion engineoperates at 2800 RPM. The processes within each cylinderare modeled as an air-standard Otto cycle with a pressure of14.7 lbf/in.², a temperature of 80°F, and a volume of 0.0196 ft³at the beginning of compression. The compression ratio is10, and maximum pressure in the cycle is 1080 lbf/in.²Determine, using a cold air-standard analysis with k = 1.4,the power developed by the engine, in horsepower, and themean effective pressure, in lbf/in.²

Answered: Image /qna-images/answer/07606c28-c6e7-47a8-a44e-d4585832eb68.jpg

Answered: ed as an air-standard Otto cycle with a…

ed as an air-standard Otto cycle with a pr 2, a temperature of 80°F, and a volume of ginning of compression. The compression maximum pressure in the cycle is 1080

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

See similar textbooks

Similar questions

4. An ideal dual combustion cycle has a compression ratio of 10. At the beginning of compression, the pressure and temperature of air is 13 psia and 64 °F with a specific volume of 11.22 ft^3/lbm. Calculate the following if the heat added at constant volume and pressure is 150 BTU/lbm. a. The cycle temperature at the beginning of the heat rejection process in °R b. The cycle heat rejected, BTU/lb c. The cycle network, BTU/lb.
Consider an air-standard Diesel cycle. Operating data at principal states in the cycle are given in the table below. The states are numbered as in the figure below. State T(K) p(kPa) u (kJ/kg) h (kJ/kg) 1 380 100 271.5 380.6 1096 5194 841.9 1157 3 2000 5194 1676 2250 971.1 255.6 734.1 1013 Determine: (a) the cutoff ratio. (b) the heat addition per unit mass, in kJ/kg. (c) the net work per unit mass, in kJ/kg. (d) the percent thermal efficiency.
At the beginning of the compression process of air-standard Diesel cycle operating with a compression ratio of 18, the temperature is 300 K and the pressure is 0.1 MPa. The cut-off ratio for the cycle is 2 and the mass flow rate in the system is 1900 kg/hr. Cp= 1.006 kJ/kg K Cv= 0.717 kJ/kg K 1) which figure represents the diagram for the process 2) which formula should be used to determine the temperature after compression? 3) calculate the temperature after isentropic compression in the presentable unit 4)which formula should be used to determine the temperature after heating? 5) calculate the temperature after isentropic compression in the presentable unit? 6) calculate the temperature after isentropic expansion in the presentable unit? 7) calculate the pressure after compression in kPa ? 8) which formula should be used to determine the work output of the engine? 9) calculate the work output of the engine kW? 10) calculate the thermal efficiency of the cycle in %? 11) which…
I only need help with parts f to i. At the beginning of the compression process of an air standard Otto cycle, p1 = 1 bar, T1 = 300 K. The maximum temperature in the cycle is 2250 K and the compression ratio is 9.8. The engine has 4 cylinders and an engine displacement of Vd = 2.1 L. Determine per cylinder: a) the volume at state 1.b) the air mass per cycle.c) the heat addition per cycle, in kJ.d) the heat rejection per cycle, in kJ.e) the net work per cycle, in kJ.f) the thermal efficiency in %.g) the mean effective pressure, in bar.h) Develop a full exergy accounting per cycle, in kJ. Let T0 = 300 K, p0 = 1 bar.i) Devise and evaluate the exergetic efficiency for the cycle.
20. An SI engine operates on an air-standard four-stroke Otto cycle with turbocharging. Air-fuel enters the cylinders at 70°C and heat in by combustion equals Qin = 280 kJ/kg. Compression ratio rk = 8. Compute the theoretical exhaust temperature of the engine. a. 239.8634 C b. 239.8633 C c. 239.8635 C d. 239.8637 C
I only need help with parts h and i. At the beginning of the compression process of an air standard Otto cycle, p1 = 1 bar, T1 = 300 K. The maximum temperature in the cycle is 2250 K and the compression ratio is 9.8. The engine has 4 cylinders and an engine displacement of Vd = 2.1 L. Determine per cylinder: a) the volume at state 1.b) the air mass per cycle.c) the heat addition per cycle, in kJ.d) the heat rejection per cycle, in kJ.e) the net work per cycle, in kJ.f) the thermal efficiency in %.g) the mean effective pressure, in bar.h) Develop a full exergy accounting per cycle, in kJ. Let T0 = 300 K, p0 = 1 bar (See image below).i) Devise and evaluate the exergetic efficiency for the cycle. part h
I only need help with parts f to i. At the beginning of the compression process of an air standard Otto cycle, p1 = 1 bar, T1 = 300 K. The maximum temperature in the cycle is 2250 K and the compression ratio is 9.8. The engine has 4 cylinders and an engine displacement of Vd = 2.1 L. Determine per cylinder: a) the volume at state 1.b) the air mass per cycle.c) the heat addition per cycle, in kJ.d) the heat rejection per cycle, in kJ.e) the net work per cycle, in kJ.f) the thermal efficiency.g) the mean effective pressure, in bar.h) Develop a full exergy accounting per cycle, in kJ. Let T0 = 300 K, p0 = 1 bar.i) Devise and evaluate the exergetic efficiency for the cycle.
I only need help with parts d to i. At the beginning of the compression process of an air standard Otto cycle, p1 = 1 bar, T1 = 300 K. The maximum temperature in the cycle is 2250 K and the compression ratio is 9.8. The engine has 4 cylinders and an engine displacement of Vd = 2.1 L. Determine per cylinder: a) the volume at state 1.b) the air mass per cycle.c) the heat addition per cycle, in kJ.d) the heat rejection per cycle, in kJ.e) the net work per cycle, in kJ.f) the thermal efficiency.g) the mean effective pressure, in bar.h) Develop a full exergy accounting per cycle, in kJ. Let T0 = 300 K, p0 = 1 bar.i) Devise and evaluate the exergetic efficiency for the cycle.
4. The efficiency of an Otto cycle is 50% and y is 1.5. What is the compression ratio ? [Ans. 4]
Cylinder conditions at the start of compression in a spark ignition engine operating atwide open throttle on an air-standard Otto cycle are 60oC and 98kPa.The engine has a compression ratio of 9.5:1 and uses petroleum with an air-fuel ratio(AF) of 15.5.Combustion efficiency is 96%, and it can be assumed that there is no exhaust residual.If the petroleum has a heating value (QHV) of 43kJ/kg,Calculate the following: 1) Temperature in oC and Pressure in kPa at all states in the cycle 2) Specific work done during the power stroke in kJ/kg 3) Heat added during combustion in kJ/kg 4) Net specific work done in kJ/kg5) Indicated thermal efficiency
(8) An SI, six-liter, V8 race car engine operates at WOT (wide open throttle) on a four- stroke cycle at 6000 r.p.m. using stoichiometric nitromethane. fuel enters the engine at a rate of 0.198 kg and combustion efficiency is 99%. calculate: (a) Volumetric efficiency of engine. (%) sec (b) flow rate of air into engine. (ke sec (c) Heat added per cycle per cylinder. (kj) ANS: (a) 95, (b) 0.337, (c)5.35
1. An open Brayton cycle using air operates with a maximum cycle temperature of 1300°F .The compressor pressure ratio is 6.0. Heat supplied in the combustion chamber is 200 Btu/lb. The ambient temperature before the compressor is 95°F, and the atmospheric pressure is 14.7 psia. Using constant specific heat, calculate the temperature of the air leaving the turbine, °F; A. 959 °F C. 837°F D. 647°F B. 595°F