(Clausius Inequality) A thermodynamic cycle operates at steady state between reservoirs at 1000 K and 500...
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 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 power cycle operates between hot and cold reservoirs at 500 K and 310 K, respectively. At steady state, the cycle rejects energy by heat transfer to the cold reservoir at a rate of 16 MW. Determine the maxi- mum theoretical power that might be developed by such a cycle, in MW.
At steady-state, a refrigeration cycle operating between hot and cold reservoirs at 300 K and 275 K, respectively, removes energy by heat transfer from the cold reservoir at a rate of 600 kW. (a) If the coefficient of performance is 4, determine the power input required, in kW (b) Determine the minimum theoretical power required for any such cycle.
At steady-state, a refrigeration cycle operating between hot and cold reservoirs at 300 K and 275 K, respectively, removes energy by heat transfer from the cold reservoir at a rate of 600 kW. (a) If the coefficient of performance is 4, determine the power input required, in kW (b) Determine the minimum theoretical power required for any such cycle.
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.
Problem 5.040 SI At steady state, a refrigeration cycle operating between hot and cold reservoirs at 300 K and 275 K, respectively, removes energy by heat transfer from the cold reservoir at a rate of 100 kw. (a) If the cycle's coefficient of performance is 4, determine the power input required, in kW. (b) Determine the minimum theoretical power required, in kW, for any such cycle.
A system executes a power cycle while receiving heat transfer at a temperature of 1000 K and discharging 1000 kJ by heat transfer at a temperature of 450 K. There are ho other heat transfers. Appling the lausus Inequality, determine entropy generation, if the thermal efficiency is 50%. Also comment if the cycle is 15. Extra-credit (10 Pts.) reversible, irreversible, or impossible? Explain your reasoning. press entropy balance using heat engine efficiency in terms of O's. Remember this is not...
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...
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