A reversible power cycle whose thermal efficiency is 40% receives 50 kJ by heat transfer from a...
Homework Answers
1-(tc/th)=0.4
tc=360k
for reversible engine
1-qc/qh=0.4
qc=30kj
nth=40 percent
1-(tc/th)=0.4
tc=360k
by first law of thermodynamics
for reversible engine
1-qc/qh=0.4
qc=30kj
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A reversible power cycle whose thermal efficiency is 40% receives 50 kJ by heat transfer from a...
A reversible power cycle whose thermal efficiency is 39% receives 50 kJ by heat transfer from a hot reservoir at 310oC...
A reversible power cycle whose thermal efficiency is 39% receives 50 kJ by heat transfer from a hot reservoir at 310oC and rejects energy by heat transfer to a cold reservoir at temperature TC. Determine the energy rejected, in kJ, and TC, in oC. Determine the entropy production for the cycle, σcycle, in kJ/K.
As shown in the figure, a reversible power cycle receives energy QH by heat transfer from...
As shown in the figure, a reversible power cycle receives energy
QH by heat transfer from a hot reservoir at TH and rejects energy
QC by heat transfer to a cold reservoir at TC.
a) If TH = 1600 K, TC = 400 K, what is the thermal
efficiency?
b) If TH = 500oC, TC = 20oC, and Wcycle = 1000 kJ, what are QH and
QC, each in kJ?
c) If ? = 60% and TC = 40oF, what...
A power cycle operating between two thermal reservoirs receives energy QH by heat transfer from a...
A power cycle operating between two thermal reservoirs receives energy QH by heat transfer from a hot reservoir at TH = 2000 K and rejects energy QC by heat transfer to a cold reservoir at TC = 400 K. For each of the following cases determine whether the cycle operates reversibly, operates irreversibly, or is impossible. (a) QH = 1000 kJ, ƞ = 60% (b) QH = 1000 kJ, Wcycle = 850 kJ (c) QH = 1000 kJ, QC =...
I only need C and D please! As shown in the figure below, a reversible power...
I only need C and D please!
As shown in the figure below, a reversible power cycle receives energy OH by heat transfer from a hot reservoir at TH and rejects energy a) If T 600 K and Tc-400 K, what is the thermal efficiency (b) If TH -500°C, Tc-20°C, and Wcydle 1800 kJ, what are Qn and Qc, each in k? (c) If η-50% and Te-40.-F, what is T., in of? (d) In-40% and TH-727"C, what is To in°C?
Problem 1: Two reversible refrigeration cycles are arranged in series. The first cycle receives energy by...
Problem 1: Two reversible refrigeration cycles are arranged in series. The first cycle receives energy by heat transfer from a cold reservoir at temperature Tc and rejects energy by heat transfer to a reservoir at an intermediate temperature T greater than Te. The second cycle receives energy by heat transfer from the reservoir at temperature T and rejects energy by heat transfer to a higher-temperature reservoir at TH. Obtain an expression for the coefficient of performance of a single reversible...
Operating in series are two reversible heat pumps. Heat transfer gives energy to the first cycle...
Operating in series are two reversible heat pumps. Heat transfer
gives energy to the first cycle from a cold reservoir at 105 K and
rejects energy by heat transfer to a reservoir at an intermediate
temperature T greater than 105 K. The second cycle receives energy
by heat transfer from the reservoir at T and rejects energy by heat
transfer to a higher-temperature reservoir at 1200 K. If the heat
pump cycles have the same co-efficient of performance, calculate:
Low...
A power cycle operates between hot and cold reservoirs at 600 K and 300 K, respectively. At steady state the cycle deve...
A power cycle operates between hot and cold reservoirs at 600 K and 300 K, respectively. At steady state the cycle develops a power output of 0.45 MW while receiving energy by heat transfer from the hot reservoir at the rate of 1 MW. (a) Determine the thermal efficiency and the rate at which energy is rejected by heat transfer to the cold reservoir, in MW. (b) Compare the results of part (a) with those of a reversible power cycle...
A reversible heat engine receives heat of 2000 kJ from a furnace at temperature of 600...
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Problem 1 (10 points). Consider a newly invented power cyclic device performing a power cycle whi...
Problem 1 (10 points). Consider a newly invented power cyclic device performing a power cycle while interacting with two thermal reservoirs. The device absorbs 2000 kJ from the hight temperature reservoir at 1000 K, and releases certain amount of heat to the low temperature reservoir at 500 K. Now consider three claims on its thermal efficiency or per ormance: η 70, η 0%, and Y-40%. (a, 4 points) Formulate the entropy production for the cyclic process in terms of the...
2. The thermal efficiency of a power cycle is 37.5% and the heat rejected to a...
2. The thermal efficiency of a power cycle is 37.5% and the heat rejected to a cold reservoir is 40 MJ. Determine the net work done by the cycle. [7 points]
As shown in the figure, a reversible power cycle receives energy
QH by heat transfer from a hot reservoir at TH and rejects energy
QC by heat transfer to a cold reservoir at TC.
a) If TH = 1600 K, TC = 400 K, what is the thermal
efficiency?
b) If TH = 500oC, TC = 20oC, and Wcycle = 1000 kJ, what are QH and
QC, each in kJ?
c) If ? = 60% and TC = 40oF, what...
I only need C and D please!
As shown in the figure below, a reversible power cycle receives energy OH by heat transfer from a hot reservoir at TH and rejects energy a) If T 600 K and Tc-400 K, what is the thermal efficiency (b) If TH -500°C, Tc-20°C, and Wcydle 1800 kJ, what are Qn and Qc, each in k? (c) If η-50% and Te-40.-F, what is T., in of? (d) In-40% and TH-727"C, what is To in°C?
Problem 1: Two reversible refrigeration cycles are arranged in series. The first cycle receives energy by heat transfer from a cold reservoir at temperature Tc and rejects energy by heat transfer to a reservoir at an intermediate temperature T greater than Te. The second cycle receives energy by heat transfer from the reservoir at temperature T and rejects energy by heat transfer to a higher-temperature reservoir at TH. Obtain an expression for the coefficient of performance of a single reversible...
Operating in series are two reversible heat pumps. Heat transfer
gives energy to the first cycle from a cold reservoir at 105 K and
rejects energy by heat transfer to a reservoir at an intermediate
temperature T greater than 105 K. The second cycle receives energy
by heat transfer from the reservoir at T and rejects energy by heat
transfer to a higher-temperature reservoir at 1200 K. If the heat
pump cycles have the same co-efficient of performance, calculate:
Low...
Problem 1 (10 points). Consider a newly invented power cyclic device performing a power cycle while interacting with two thermal reservoirs. The device absorbs 2000 kJ from the hight temperature reservoir at 1000 K, and releases certain amount of heat to the low temperature reservoir at 500 K. Now consider three claims on its thermal efficiency or per ormance: η 70, η 0%, and Y-40%. (a, 4 points) Formulate the entropy production for the cyclic process in terms of the...
2. The thermal efficiency of a power cycle is 37.5% and the heat rejected to a cold reservoir is 40 MJ. Determine the net work done by the cycle. [7 points]
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