Question

In: Mechanical Engineering

A Carnot engine operates on air between high and low pressures of 3 MPa and 100...

A Carnot engine operates on air between high and low pressures of 3 MPa and 100 kPa with a low temperature of 20°C. For a compression ratio of 15, calculate

the thermal efficiency?,

the MEP?

, and the work output?

Solutions

Expert Solution


Related Solutions

A heat engine operates between a high-temperature reservoir at 610 K and a low-temperature reservoir at...
A heat engine operates between a high-temperature reservoir at 610 K and a low-temperature reservoir at 320 K. In one cycle, the engine absorbs 6800 J of heat from the high-temperature reservoir and does 2200 J of work. A) What is the net change in entropy as a result of this cycle?
A Carnot heat engine operates between two thermal reservoirs ( T1 > T2 ) to generate...
A Carnot heat engine operates between two thermal reservoirs ( T1 > T2 ) to generate as much power as required as to drive a machine ( input power requirement of 30 kW ) plus to drive an ideal heat pump working between 2 temperature limits ( T3 and T4 ) ( T3 > T4 ) . The pump takes 17 kW of heat from the low temperature reservoir where T1 = 1200K, T2= T3 =335 K, T4 = 278...
An engine operates in a Carnot cycle. At point A in the cycle, 2.34 mol of...
An engine operates in a Carnot cycle. At point A in the cycle, 2.34 mol of a monatomic ideal gas has a pressure of 1,400 kPa, a volume of 10.0 L, and a temperature of 720 K. The gas expands isothermally to point B and then expands adiabatically to point C, where its volume is 24.0 L. An isothermal compression brings it to point D, where its volume is 15.0 L. An adiabatic process returns the gas to point A....
A Carnot engine operates between temperatures of 200 K and 350 K. In each cycle, 4000...
A Carnot engine operates between temperatures of 200 K and 350 K. In each cycle, 4000 J of heat is added to the ideal gas. This engine works on 0.5 mols of a diatomic gas. A) Calculate the volume ratio for just the adiabatic expansion. B) Determine the compression ratio - the highest volume divided by the lowest. C) If you reversed the cycle, how much work would be necessary to pull 100 J of heat from the cold temperature...
A Carnot heat engine operates between temperature levels of 600 K and 300 K with 8...
A Carnot heat engine operates between temperature levels of 600 K and 300 K with 8 MW heat transferred in the boiler. It drives a compressor, which compresses steam from 200 kPa, 200°C to 1 MPa, 500°C. If mass flow rate of the steam is 5 kg/s. determine the following: (a) The power output of the heat engine (kW). (b) The power input of the compressor (kW). (c) The efficiency of the compressor.
A Carnot engine uses air as the working substance, receives heat at a temperature of 315oC,...
A Carnot engine uses air as the working substance, receives heat at a temperature of 315oC, and rejects it at 65oC. The maximum possible cycle pressure is 6.0MPa and the minimum volume is 0.95 liters. When heat is added, the volume increases by 250%. Determine the pressure and volume at each state in the cycle.
8-12)A heat engine operates in a Carnot cycle between 84.0°C and 355°C. It absorbs 21,600 J...
8-12)A heat engine operates in a Carnot cycle between 84.0°C and 355°C. It absorbs 21,600 J of energy per cycle from the hot reservoir. The duration of each cycle is 3.00 s. (a) What is the mechanical power output of this engine? kW (b) How much energy does it expel in each cycle by heat? kJ 12)A Carnot engine operates between 105°C and 18°C. How much ice can the engine melt from its exhaust after it has done 4.0 ✕...
A Carnot heat engine within a piston cylinder has 10 kg of air as the working...
A Carnot heat engine within a piston cylinder has 10 kg of air as the working fluid and operates between 1000 K and 350 K. During the heat addition process the pressure changes by a factor of 2.5. The volume at the end of the isentropic compression process is 5m^3. Determine the pressure at each state in kPa and the net heat of the cue in KJ assuming Constant Heats at 300 K. Draw a P-v and T-s diagram
Consider an automobile engine which operates on the ideal Otto cycle. In this engine, air is...
Consider an automobile engine which operates on the ideal Otto cycle. In this engine, air is compressed with a compression ratio of 10. At the beginning of the compression process, air is at 105 kPa and 17oC, and in the combustion process 640 kJ/kg of heat is added to air. Taking into account the variation of specific heats with temperature, determine (a) the pressure and temperature at the end of the heat-addition (combustion) process, (b) the net work output, (c)...
A gas turbine air- standard cycle operates between a low pressure of 14.7 Psia and a...
A gas turbine air- standard cycle operates between a low pressure of 14.7 Psia and a high pressure of 60 Psia. The temperature of the gas at the inlet to the compressor and turbine are 60 and 1000 respectively. If 40,000 ft3 /min. of air enter the compressor and assuming k=1.41, compute: a) The theoretical net power output, and b) The air – standard thermal efficiency
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT