Question

In: Mechanical Engineering

A piston-cylinder heat engine has five kilograms of air as the working fluid. Analyze this engine...

A piston-cylinder heat engine has five kilograms of air as the working fluid. Analyze this engine as a Carnot engine and determine the work of expansion and the amount of heat rejected in KJ assuming constant specific heat at 300k. During the heat rejection, the temperature is 300?. There is a temperature difference of 600 degrees in the engine. At the beginning of the heat rejection process, the pressure is .2MPa and during heat addition the volume doubles. Draw the P-v diagram and T-s diagram for the cycle.

Solutions

Expert Solution


Related Solutions

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
Q2. Two kilograms of air within a piston-cylinder configuration execute a Carnot power cycle between temperatures...
Q2. Two kilograms of air within a piston-cylinder configuration execute a Carnot power cycle between temperatures 750 K and 300 K. The isothermal expansion is associated with a heat input of 60 kJ from the surroundings. The volume after expansion has occurred isothermally is 0.4 m3 . Assuming air behaves as an ideal gas, calculate: (i) thermal efficiency for the cycle (ii) pressure and volume at the beginning of the isothermal expansion, in kPa and m3 , respectively. (iii) the...
Fundamentals of Engineering Thermodynamics By Michael J.Moran 8th edition 5.83)Two kilograms of air within a piston-cylinder...
Fundamentals of Engineering Thermodynamics By Michael J.Moran 8th edition 5.83)Two kilograms of air within a piston-cylinder assembly execute a Carnot power cycle with maximum and minimum temperatures of 750 K and 300 K, respectively. The heat transfer to the air during the isothermal expansion is 60kJ. At the end of the isothermal expansion the volume is 0.4m^3. Assuming the ideal gas model for the air, determine (a) the thermal efficiency (b) the pressure and volume at the beginning of the...
Q2. Two kilograms of air within a piston-cylinder configuration execute a Carnot power cycle between temperatures...
Q2. Two kilograms of air within a piston-cylinder configuration execute a Carnot power cycle between temperatures 750 K and 300 K. The isothermal expansion is associated with a release of 60 kJ of heat into the surroundings. The volume after expansion has occurred isothermally is 0.4 m3 . Assuming air behaves as an ideal gas, calculate: (i) thermal efficiency for the cycle (ii) pressure and volume at the beginning of the isothermal expansion, in kPa and m3 , respectively. (iii)...
An ideal diesel engine uses air as the working fluid and operates with a thermal efficiency...
An ideal diesel engine uses air as the working fluid and operates with a thermal efficiency ?th =0.5 with a rate of heat addition Qin=120 kW. The temperature at the beginning and the end of the addition heat (combustion) are respectively: T2=900 K and T3=2100 K. Assume constant specific heats (Cp and Cv). The air properties at a room temperature T1=293.0 K are: Cp=1.005 kJ/kg.K, Cv=0.718KJ/kg.K, the gas constant of air is R=0.287 kJ/kg.K and the ratio of specific heats...
Consider a Carnot heat engine cycyle executed in a closed system (piston-cylinder device) using 0.01848695 kg...
Consider a Carnot heat engine cycyle executed in a closed system (piston-cylinder device) using 0.01848695 kg of stem as the working fluid. It is known that the maximum absolute temperature in the cycle is three times the minimum absolute temperature, and the net-work output of the cycle is 90 KJ assuming no kinetic and potential energy changes. If the steam changes from saturated vapor (state 3=h_g) to saturated liquid(state 4=h_f) during heat rejection (process3-4) determine a) the thermal efficiency of...
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.
Two kilograms of CO2 gas is contained in a piston-cylinder assembly at a pressure of 6.5...
Two kilograms of CO2 gas is contained in a piston-cylinder assembly at a pressure of 6.5 bar and a temperature of 300 K. The piston has a mass of 5000 kg and surface area of 1m2. The friction of the piston on the walls is significant and cannot be ignored. The atmospheric pressure is 1.01325 bar. The latch holding the piston in position is suddenly removed and the gas is allowed to expand. The expansion is arrested when the volume...
1. An aluminum air-cooled engine cylinder head for a single cylinder, 2-stroke engine is to be...
1. An aluminum air-cooled engine cylinder head for a single cylinder, 2-stroke engine is to be die-cast. The overall diameter of the cylinder head is 101.6 mm. If the projected plan area of the runners and gating system is 100 mm2 and the casting pressure is 10 MPa (1500 psi), what minimum locking force is required for the die-casting machine in kN.
A 0.2 m^3 piston/cylinder contains air at 400 K and 400 kPa and receives heat from...
A 0.2 m^3 piston/cylinder contains air at 400 K and 400 kPa and receives heat from a constant temperature heat source at 1300 K. The piston expands at constant pressure to a volume of 0.6 m^3. Determine the change of availability of the system. Assume To= 300K and Po = 100kPa. Answer should be 210.3 kJ.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT