A cyclic machine, shown in Fig. P5.56, receives 300 kJ from a 1000-K energy reservoir. It rejects 120 kJ to a 400-K energy reservoir, and the cycle produces 180 kJ of work as output. Is this cycle reversible, irreversible, or impossible?

A cyclic machine, shown in Fig. P5.56, receives 300 kJ from a 1000-K energy reservoir. It rejects 120 kJ to a 400-K energy reservoir, and the cycle produces 180 kJ of work as output. Is this cycle reversible, irreversible, or impossible?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Related questions

Q: A power cycle operates between hot and cold reservoirs at 500 K and 310 K. At steady state the cycle…

Q: Shown below is P-V diagram for a reversible cycle enclosed by 4 reversible process curves. The curve…

Q: A system executes a power cycle while receiving 1000 kJ by heat transfer at a temperature of 500 K…

A: (a) The cycle entropy production is 0.5 kJ/K. (b) The cycle operates irreversibly.

Q: system undergoes a power cycle while receiving 1450 kJ by heat transfer from a thermal reservoir at…

Q: During a throttling process, the enthalpy (flow energy + internal energy) of a fluid remains…

A: Since there is not clearly mentioned what needs to be answered. I assume that this about the…

Q: The second-law efficiency of naturally occurring processes is zero if none of the work potential is…

Q: An oil pump operating at steady state delivers oil at a rate of 12 lb/s through a 1-in.-diameter…

A: Givenm= 12 lb/s=5.443 kg/sd=1 in =0.0254mρ=55 lb/ft3=881 kg/m3∆P=40 lbf/in2=275.79kPa

Q: There is no entropy transfer associated with energy transfer as work? Explain.

A: The energy transfer from the system is in the form of work represents that the energy transfer from…

Q: As in mechanical systems, friction in the workplace is bound to generate entropy and reduce…

A: Entropy is associated with the irreversibility of a system, it denotes the degree of randomness of a…

Q: One kilogram of water in a piston- cylinder assembly undergoes the two internally reversible…

Q: A feedwater heater in a vapor power plant operates at steady state with liquid water entering at…

A: Given data At inlet 1 (liquid water) P1 = 9.0 bar T1 = 45oC = (45 +273)K = 318 K m˙1= 3.2*105 kg/h…

Q: Air enters a nozzle operating at steady-state at 800°R, with a negligible velocity, and exits with a…

A: Given : Temperature at inlet (T1) = 8000 R Velocity at Exit (V2) = 1500 ft/s Heat Transfer (Q/m) = -…

Q: 2. In an irreversible process, there is a (a) loss of heat (b) gain of heat (c) no loss of work (d)…

A: As per the guidelines of BARTLEBY we are subjected to solve only three sub parts of a question.…

Q: An oil pump operating at steady state delivers oil at a rate of 6 kg/s through a 2.5-cm- diameter…

A: The density of oil is .The mass flow rate is .The rise of pressure from inlet to outlet is .The…

Q: An oil pump operating at steady state delivers oil at a rate of 10 lb/s through a 1-in-diameter exit…

Q: An inventor claims to have developed a refrigerator that at steady state requires a net power input…

A: The net power input is 1.1 horsepower. Thus,

Q: 3.5 A heat pump is a closed system that operates steadily (or in cycles) while requiring the…

A: Solution

Q: An electrically-driven pump operating at steady state draws water from a pond at a pressure of 1…

A: GivenP1=1 barP2=4 barQ=40kg/sηisen=80%

Q: A power cycle receives 5000 Btu by heat transfer from a reservoir at 1500°F and discharges energy by…

Concept explainers

Laws of thermodynamics

Thermodynamics is a field of research, which needs the creation of absolute and ideal states and logical and practical examination of the actual conditions. By considering all the laws and theories of thermodynamics, the chemical reactions, the occurrence of processes, and physiological functions can be predicted with this field.

Question

A cyclic machine, shown in Fig. P5.56, receives 300 kJ from a 1000-K energy reservoir. It rejects 120 kJ to a 400-K energy reservoir, and the cycle produces 180 kJ of
work as output. Is this cycle reversible, irreversible, or impossible?
TH= 1000 K
JL,
QH
= 300 kJ
Суclic
machine
W = 180 kJ
QL = 120 kJ
T = 400 K
%3D

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Defining the problem

VIEW

Final solution

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

If a closed system undergoes a process for which S2=S1, the process must be internally reversible. - True or False One of the Carnot principles states that all power cycles operating between the same two thermal reservoirs have the same thermal efficiency. - True or False One statement of the second law of thermodynamics recognizes that the extensive property entropy is produced within systems whenever internal irreversibilities are present. - True or False
An oil pump operating at steady state delivers oil at a rate of 10 lb/s through a 1-in.-diameter exit pipe. The oil, which can be modeled as incompressible, has a density of 70 lb/ft3 and experiences a pressure rise from inlet to exit of 40 lb/in². There is no significant elevation difference between inlet and exit, and the inlet kinetic energy is negligible. Heat transfer between the pump and its surroundings is negligible, and there is no significant change in temperature as the oil passes through the pump. Determine the velocity of the oil at the exit of the pump, in ft/s, and the power required for the pump, in hp. Determine the power required for the pump, in hp.
In a cycle what always happens when an ideal process is replaced by a real process The efficiency decreases. The internal energies decrease. The mass flow rate increases. The enthalpies decrease. The enthalpies increase.
All reversible heat engines operating between the same two reservoirs have the same efficiency (the second Carnot principle).
As shown in the figure, a reversible power cycle R and an irreversible power cycle I operate between the same hot and cold thermal reservoir. Cycle I has a thermal efficiency equal to one-third of the thermal efficiency of cycle R. (b) If each cycle develops the same net work, determine which cycle (i) receives greater energy by heat transfer from the hot reservoir, (ii) discharges greater energy by heat transfer to the cold reservoir. WR R Hot reservoir m Qc=QH-WR l'c=QH-W₁ Cold reservoir W₁
The entropy change between two specified states is the same whether the process is reversible or irreversible.
A system executes a power cycle while receiving 900 Btu by heat transfer at a temperature of 900°R and discharging 600 Btu by heat transfer at a temperature of 540°R. There are no other heat transfers. Determine the cycle thermal efficiency. Use the Clausius Inequality to determine ocycle, in Btu/°R. Determine if this cycle is internally reversible, irreversible, or impossible.
T-12
A system executes a power cycle while receiving 1000 Btu by heat transfer at a temperature of 900oR and discharging 600 Btu by heat transfer at a temperature of 540oR. There are no other heat transfers.Determine the cycle thermal efficiency. Use the Clausius Inequality to determine σcycle, in Btu/oR. Determine if this cycle is internally reversible, irreversible, or impossible.
A refrigerator operates at steady-state with a COP of 4.5 and power input of 0.8kW. If energy is rejected from the refrigerator to the surroundings at 20°C because of heat transfer from metal coils, the rate of energy rejection is computed as kW and the lowest theoretical temperature inside the refrigerator would be °C.
Water stored in a large, well-insulated storage tank at 21oC, and atmospheric pressure is being pumped at steady state from this tank by a pump at the rate of 40m3/h. The motor driving the pump supplies energy at the rate of 8.5 k.W. The water is used as a cooling medium and passes through a heat exchanger where 255 k.W of heat is added to the water. The heated water then flows to a second large, vented tank, which is 25 m above the first tank. Determine the final temperature of the water delivered to the second tank.
Discuss thermal energy reservoirs, reversible and irreversible processes, heat engines, refrigerators, and heat pumps.