Engineering, 21.03.2020 03:00, jasminelynn135owmyj1
The idealized cycle taking place inside a diesel cylinder differs only slightly from the Otto cycle discussed in class for a gasoline engine. The compression stroke is similarly adiabatic, but the fuel burning takes place at constant pressure (not constant volume like gasoline). The rest of the diesel cycle is the same as gasoline, an ad abatic power stroke (expansion) and a constant volume cooling of the gas.
Consider a diesel motor operating a cylinder (volume-0.80 L) with compression ratio of 16 using an Argon gas starting at 50 C Gjust before compression) and atmospheric pressure. Assume the heat released from burning vaporized diesel fuel in the cylinder releases 350 J of heat.
a) Draw a Pressure-Volume diagram for the diesel cycle. Indicate heat flow in, out or zero, as appropriate for each segment of the cycle. Display with shading the net work done by the gas during the cycle.
b) Calculate the work done by the gas on each segment of the cycle. What is the net work done by the gas?
c) Calculate the heat exchanged by the gas on each segment of the cycle. What is the net heat exchanged by the gas?
d) Compare your results for the net work and heat in b) and c). Explain your result?
e) Calculate the thermal efficiency of this diesel motor?
Answers: 2
Engineering, 03.07.2019 15:10, brooklyn674
Apiston-cylinder with a volume of 0.25 m3 holds 1 kg of air (r 0.287 k/kgk) at a temperature of 100 c. heat transfer to the cylinder causes an isothermal expansion of the piston until the volume triples. how much heat is added to the piston-cylinder?
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Engineering, 04.07.2019 18:10, ahmedeldyame
Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.
Answers: 1
Engineering, 04.07.2019 18:10, hadellolo8839
Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false
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The idealized cycle taking place inside a diesel cylinder differs only slightly from the Otto cycle...
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