The pressure and temperature at the beginning of the compression are 1 bar and 27°C. Assuming...

The pressure and temperature at the beginning of the compression are 1 bar and 27°C. Assuming an ideal engine in which the compression ratio and the expansion ratio for a C.I engine are (15+ ? ???) and (8− ? ???) respectively. Determine the mean effective pressure, the ratio of maximum pressure to mean effective pressure and cycle efficiency. Also, find the fuel consumption per kWh if the indicated thermal efficiency is 50% of ideal efficiency, mechanical efficiency is 80% and the calorific value of diesel oil is 42000 kJ/kg. Assume for air: cp = 1.005 kJ/kg K ; cv = 0.718 kJ/kg K, γ = 1.4. [7 Marks] Where n is 17

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samet mamat answered 5 months ago

In an ideal standard dual cycle, the pressure and temperature at the beginning of compression are...

In an ideal standard dual cycle, the pressure and temperature at the beginning of compression are 1 bar and 47°C, respectively. The heat supplied in the cycle is 1250kJ/kg, two third of this heat is being added at constant volume and the remaining heat is added at constant pressure. If the compression ratio is 16, determine i. the maximum temperature in cycle ii. thermal efficiency of the cycle iii. the mean effective pressure

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

At the beginning of the compression process of an air-standard Otto cycle, p1 = 1 bar and T1 = 300 K. The compression ratio is 3.5 and the heat addition per unit mass of air is 1400 kJ/kg. Determine: (a) the maximum temperature of the cycle, in K. (b) the net work, in kJ/kg. (c) the percent thermal efficiency of the cycle. (d) the mean effective pressure, in kPa.

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

At the beginning of the compression process of an air-standard Otto cycle, p1 = 1 bar, T1 = 290 K, V1 = 400 cm3. The maximum temperature in the cycle is 2200 K and the compression ratio is 8. Determine (a) the heat addition, in kJ. kJ (b) the net work, in kJ. kJ (c) the thermal efficiency. % (d) the mean effective pressure, in bar. bar (e) Develop a full accounting of the exergy transferred to the air during...

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

At the beginning of the compression process of an air-standard Otto cycle, p1 = 1 bar and T1 = 300 K. The compression ratio is 8.5 and the heat addition per unit mass of air is 1200 kJ/kg. Determine: (a) the maximum temperature of the cycle, in K. (b) the net work, in kJ/kg. (c) the percent thermal efficiency of the cycle. (d) the mean effective pressure, in kPa.

Consider a compressor in which air enters at 1 bar, 27°C and exits at 3.5 bar,...

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At the beginning of compression of an ideal Diesel cycle the gas has a temperature and...

At the beginning of compression of an ideal Diesel cycle the gas has a temperature and pressure of 400C and 90 kN/m2, respectively. The volume ratio of compression is 16:1. The maximum temperature of the cycle is 14000C. Determine, for the cycle, the pressure and temperature at each of the cycle process change points, [8] the work done/kg gas, [4] the thermal efficiency, [4] the work ratio, [3] the mean effective pressure,...

Toluene vapors at 1.013 bar, 150°C, are cooled under constant pressure to a final temperature of...

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Argon gas is initially at a pressure of 10 bar and temperature of 45oC (state 1),...

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The compression ratio is 10 in the air standard Otto cycle. Pressure at the beginning of...

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3 Kg mass of water is heated to a temperature of 99.5 C at 1 bar...

3 Kg mass of water is heated to a temperature of 99.5 C at 1 bar of pressure. It is slowly poured into a heavily insulated beaker containing 7.5 Kg of water at a temperature and pressure of 4 C, 1 bar, respectively. The specific heat of the water, an incompressible material is, c = 4.1 KJ/(Kg K). The beaker can be considered to be an adiabatic system. The two water mass’ reach an equilibrium temperature. There is no kinetic...

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The pressure and temperature at the beginning of the compression are 1 bar and 27°C. Assuming...

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