Thermodynamics total engine displacement help

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SUMMARY

The discussion focuses on calculating various thermodynamic properties of a 6-cylinder engine operating on a four-stroke ideal Otto cycle. Key parameters include a bore of 115mm, stroke of 145mm, and a clearance volume of 300 cubic centimeters. The engine operates at 3000 RPM with intake air at 25°C and 101 kPa. The calculations required include total engine displacement, compression ratio, work done per cycle, engine power, heat added per second, and efficiency.

PREREQUISITES
  • Understanding of thermodynamic cycles, specifically the Otto cycle
  • Familiarity with engine displacement calculations
  • Knowledge of heat transfer principles in thermodynamics
  • Proficiency in using equations of state for gases
NEXT STEPS
  • Calculate total engine displacement using the formula: Displacement = (π/4) × Bore² × Stroke × Number of Cylinders
  • Determine the compression ratio using the formula: Compression Ratio = (Volume at Bottom Dead Center) / (Volume at Top Dead Center)
  • Analyze the work done per cycle (Wkcycle) using the first law of thermodynamics for the Otto cycle
  • Evaluate engine power output using the formula: Power = Work per Cycle × Engine Speed / 2π
USEFUL FOR

This discussion is beneficial for mechanical engineers, automotive engineers, and students studying thermodynamics or engine design, particularly those focused on internal combustion engines and their performance analysis.

Matrixhunter
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Homework Statement


A 6 cylinder engine has cylinders wirh a bore of 115mm and a stroke of 145mm Each cylinder also has a clearance volume of 300 cubic centimeter. This engine operates on a four stroke ideal otto cycle and at 3000 rpm. The temperature and pressure of the intake air is 25 Celsius and 101kPa respectively. In addition, 900 kJ/kg of heat is rejected during the constant volume heat rejection process. Determine the following
A. total engine displacement
B. Compression ratio for this engine
C. P, V, T, at the four states
D. Wkcycle
E. Power of engine
F. Total heat added per second Qin
G. Efficiency

Homework Equations


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The Attempt at a Solution


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Please answer this problem for me step by step with units and coversions with the equations used i need every single detail
 
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An ideal dry compression refrigeration cycle operates at steady state with refrigerant 134a as the working fluid . Saturated vapor enters the compressor at -10C and saturated liquid leaves the condenser at 25C. The mass flow rate of refrigerant is 5 kg/min Determine
A) enthalpy at state 3
B) the compressor power in kW
C) Rate of heat transfer (Qin) in kJ/s
D) Rate of heat transfer (Qrej) in kJ/s
E) COP
F) COR
Please include step by step with units and conversions and equations i need every detail
 
An air conditioner operates on an ideal wet compression cycle using Refrigerant-22. the refrigerant is at -5 Celsius in the evaporator and 40 Celsius in the condensor. if the mass flow rate of the refrigerant is 5kg/min, determine:
A) the compressor power in kW
B) rate of heat transfer (Qin) in kJ/s
C) rate of heat transfer (Qrej) in kJ/s
D) COP
E) COR

i need every single step with units and coversions and all the equations used i need every detail
 

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