I need solving question 2 only? Q1. In an Otto cycle air is compressed from an...

I need solving question 2 only?

Q1.

In an Otto cycle air is compressed from an initial pressure 120 kPa and temperature 350 (K). The cycle has compression ratio of 10. In the constant volume heat addition process 1000 kJ/kg heat is added into the air. Considering variation on the specific heat of air with temperature, determine,

(a) the pressure and temperature at the end of heat addition process (show the points on P-v diagram)

(b) the network output

(c) the thermal efficiency

(d) the mean effective pressure for the cycle

The gas constant of air is R = 0.287 kJ/kg.K

Q2.

Repeat Q1 using cold air standard assumption.

(Properties: The properties of air at room temperature are cp = 1.005 kJ/kg·K, cv = 0.718 kJ/kg·K, R = 0.287 kJ/kg·K, and k = 1.4)

Solutions

Expert Solution

samet mamat answered 1 year ago

Next > < Previous

Related Solutions

QUESTION NO 1 In an Otto cycle air is compressed from an initial pressure 120 kPa...

QUESTION NO 1 In an Otto cycle air is compressed from an initial pressure 120 kPa and temperature (T = 380). The cycle has compression ratio of 10. In the constant volume heat, addition process 1000 kJ/kg heat is added into the air. Considering variation on the specific heat of air with temperature, determine, (a) the pressure and temperature at the end of heat addition process (show the points on P-v diagram) (b) the network output (c) the thermal efficiency...

In an Otto cycle air is compressed from an initial pressure 120 kPa and temperature 370...

In an Otto cycle air is compressed from an initial pressure 120 kPa and temperature 370 T (K). The cycle has compression ratio of 10. In the constant volume heat addition process 1000 kJ/kg heat is added into the air. Considering variation on the specific heat of air with temperature, determine, (a) the pressure and temperature at the end of heat addition process (show the points on P-v diagram) (b) the network output (c) the thermal efficiency (d) the mean...

In an Otto cycle air is compressed from an initial pressure 120 kPa and temperature 370...

I need to design an air nozzle for a compressed air system with multiple outlets. All...

I need to design an air nozzle for a compressed air system with multiple outlets. All I know about the current system is there is 109 psi available in the air line. If I use the mass flow rate equation for a compressed ideal gas, how do I know the pressure hasn’t dropped in the line to decrease the Mach number as I increase the area of the nozzles? If the flow is choked, will the velocity remain constant as...

An Otto Cycle has air operating as the working fluid. The air begins the compression process...

An Otto Cycle has air operating as the working fluid. The air begins the compression process at 90 kPa and 40oC. During the heat addition process, the maximum temperature of the air (T3) is 2000oC. The compression ratio of the cycle is 9.2. Treating this as a “Hot Air Standard Cycle”, determine the temperature and pressure at the end of each process, the net work per kg of air produced in the cycle, the thermal efficiency of the cycle, and...

At the beginning of the compression process of an air standard Otto cycle, p1 = 1...

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 = 2.0 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...

At the beginning of the compression process of an air standard Otto cycle, p1 = 1...

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 = 2.6 L. Determine per cylinder: a) the volume at state 1. (IN LITERS) I have tried 2.8L 0.945 L and 0.789 L but i keep getting it wrong. b) the air mass...

An air-standard Otto cycle operates with a compression ratio of 8. At the start of the...

An air-standard Otto cycle operates with a compression ratio of 8. At the start of the compression stroke, the pressure is 15 psia and the temperature is 80 degrees F. The maximum pressure in the cycle is 550 psia. Find a) the thermal efficiency of the cycle, b) the specific volume at the start of the compression stroke, c) the specific volume at the end of the compression stroke, and d) maximum temperature in the cycle.

At the beginning of the compression process of an air standard Otto cycle, p1 = 1...

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 = 2.7 L. Determine per cylinder: 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...

At the beginning of the compression process of an air standard Otto cycle, p1 = 1...

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 = 2.7 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...

Subjects