Question

In: Mechanical Engineering

The intial conditions for an air-standard Otto cycle operating with a compresssion ratio of 8:1 are...

The intial conditions for an air-standard Otto cycle operating with a compresssion ratio of 8:1 are 14.7 psia and 60degF. At the beginning of the compression stroke, the cylinder volume of 270 in^3 and 9 Btu of heat are added to the gas during the constant-volume heating process. Calculate the thermal efficiency and the mean effective pressure of the cycle.

Solutions

Expert Solution

samet mamat answered 2 years ago
Next > < Previous

Related Solutions

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.
The compression ratio is 10 in the air standard Otto cycle. Pressure at the beginning of...
The compression ratio is 10 in the air standard Otto cycle. Pressure at the beginning of the compression stroke is 1XY kPa and the temperature is 15 ºC. The heat transfer to the air for each cycle is 18XY kJ / kg air. Draw the T-s and P-v diagrams. (x=9 y=8). Note: Accept that specific temperatures do not change with temperature. Take k = 1.4 and Cp = 1.0031 kJ / kg-K. a) For question 1, we draw the temperature...
An ideal cold air-standard Otto cycle has a compression ratio of 9.2. At the end of...
An ideal cold air-standard Otto cycle has a compression ratio of 9.2. At the end of the expansion process, the pressure is 110 psi, the temperature is 1020 °R and the specific volume is 3.435 ft3/lbm. The heat rejection from the cycle is 92 BTU/lbm of air. Evaluate specific heat at 100 °F and calculate the following by hand: What is the mean effective pressure (psi)? The correct answer is 231.8 psi. Show every step and calculation with units necessary.to...
The compression ratio of an air-standard Otto cycle is 9.5. Prior to the isentropic compression process,...
The compression ratio of an air-standard Otto cycle is 9.5. Prior to the isentropic compression process, the air is at 100 kPa, 35°C and 600 cm3 . The temperature at the end of the isentropic expansion process is 800 K. Using specific heat values at room temperature (25°C), determine (a) the highest temperature and pressure in the cycle (b) the amount of heat transferred in during the cycle (kJ) (c) the thermal efficiency (d) the mean effective pressure Part (a)...
A cold air-standard Otto cycle has a compression ratio of 6 and the temperature and pressure...
A cold air-standard Otto cycle has a compression ratio of 6 and the temperature and pressure at the beginning of the compression process are 520°R and 14.2 lbf/in.2, respectively. The heat addition per unit mass of air is 500 Btu/lb. Assume constant specific heats evaluted at 520°R. Determine: (a) the maximum temperature, in °R. (b) the maximum pressure, in lbf/in.2 (c) the percent thermal efficiency. (d) the mean effective pressure, in lbf/in.2
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...
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...
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 = 2.2 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...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT