Problem 1: Two reversible refrigeration cycles are arranged in series. The first cycle receives energy by...
two
reversible cycles arranged in series each produce the same net work
As shown in Fig. P5.26, two reversible cycles arranged in series each produce the same net work. W The first cycle receives energy QB by heat transfer from a hot reservoir at 1000 degree R and rejects energy Q by heat transfer to a reservoir at an intermediate temperature, T. The second cycle receives energy Q by heat transfer from the reservoir at temperature T and rejects energy...
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...
Data are provided for two reversible refrigeration cycles. One cycle operates between hot and cold reservoirs at 27°C and 15°C, respectively. The other cycle operates between the same hot reservoir at 27°C and a cold reservoir at -20°C Weycle, If each refrigerator removes the same amount of energy by heat transfer from its cold reservoir, determineeyclc the ratio of the net work input values of the two cycles. Weycle,2 Weycle,1
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 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.
4.A reversible refrigeration cycle operates between cold and hot reservoirs at temperatures TC and TH, respectively. If the coefficient of performance is 3.3 and TH = 75°F, determine TC, in °F. 5.A reversible refrigeration cycle operates between cold and hot reservoirs at temperatures TC and TH, respectively. If TC = -26°C and TH = 40°C, determine the coefficient of performance.
5.43
A refrigeration cycle operating between two reservoirs receives energy QC from a cold reservoir TC = 275 K and rejects energy QH to a hot reservoir at TH = 315 K, For each of the following cases, determine whether the cycle operates reversibly, operates irreversibly, or is impossible: QC = 1000 kJ, Wcycle = 80 kJ. QC = 1200 kJ. QH = 2000 kJ. QH = 1575 kJ. Wcycle = 200 kJ. beta = 6.
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 =...
A reversible power cycle whose thermal efficiency is 40% receives 50 kJ by heat transfer from a hot reservoir at 600 K and rejects energy by heat transfer to a coldreservoir at temperature Tc. Determine the energy rejected in KJ
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?