THE OTTO CYCLE: (Gioradano, problem 16.61) The Otto cycle is shown in the accompanying figure, and is the idealized cycl

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The Otto Cycle Gioradano Problem 16 61 The Otto Cycle Is Shown In The Accompanying Figure And Is The Idealized Cycl 1 (48.37 KiB) Viewed 94 times

THE OTTO CYCLE: (Gioradano, problem 16.61) The Otto cycle is shown in the accompanying figure, and is the idealized cycle for an internal combustion engine. Consider an Otto cycle that operates on 0.070 mole of ideal gas be- tween volumes V=V₁ = V₂=0.20 L and V=V₁ = V 1.60 L. PART A: In which parts of the cycle (12, 23, 34, 41) is work done on the system? In which parts does heat flow into or out of the system? PART B: Path 41: Adiabatic transition: The lowest temperature is 323K at point 4, where the ex- haust valve is open and the pressure is 1.0 atm. Find the temperature at point! Hint: Use equation: P= 1/7 (adiabatic process) to first find the pressure, of the ideal gas. Assume that y- 5/3. PART C: Path 1-2: The combustion of fuel in stroke 1-2 supplies 100 J of energy to the gas. Calculate the change in tem- perature of the gas and find the temperature of the gas at point 2. PART D: What is the pressure at point 2? PART E: Path 2-3: Adiabatic transition: Find the temperature and pressure at point 3, the end of the "power stroke". PART F: Path 3-4: Determine the heat loss during stroke 34. PART G: Determine then efficiency for this Otto engine: e-W/QH. Note: Heat loss and friction in a real Otto engine will reduce this ideal effi- ciency. PART H: Calculate and compare to the efficiency of a Carnot engine running between the same high and low temperatures. Otto cycle 3