FUND OF ENG THERMODYN-WILEYPLUS NEXT GEN
9th Edition
ISBN: 9781119840589
Author: MORAN
Publisher: WILEY
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Chapter 5, Problem 5.2P
a.
To determine
Performance of the system using Clausius's statement of the second law.
b.
To determine
Performance of the system using Kelvin-plank statement of the second law.
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Two reversible power cycles are arranged in series. The first cycle receives energy by heat transfer from a reservoir at temperature TH and rejects energy to a reservoir at an intermediate temperature T. The second cycle receives the energy rejected by the first cycle from the reservoir at temperature T and rejects energy to a reservoir at temperature TC lower than T. Derive an expression for the intermediate temperature T in terms of TH and TC when,a. The net works of the two power cycles are equalb. The thermal efficiencies of the two power cycles are equal
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FUND OF ENG THERMODYN-WILEYPLUS NEXT GEN
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- * \Q1 The refrigerator shown in Fig. P5.35 operates at steady state with a coefficient of performance of 4.5 and a power in- put of 0.8 kW. Energy is rejected from the refrigerator to the surroundings at 20°C by heat transfer from metal coils whose average surface temperature is 28°C. Determine (a) the rate energy is rejected, in kW. (b) the lowest theoretical temperature inside the refrigerator, in К. (c) the maximum theoretical power, in kW, that could be de- veloped by a power cycle operating between the coils and the surroundings. Would you recommend making use of this opportunity for developing power? Refrigerator B = 4.5 Surroundings, 20°C Coils, 28°C S. 0.8 kW إضافة ملفarrow_forwardQ2 In a system, 90 kJ of heat is supplied from state 1 to state 2 by constant volume process. The internal energy at state 1 is 100 kJ. The system rejects 105 kJ of heat from state 2 to state 3 by constant pressure process and 40 kJ of work is done on it. The system is brought back from state 3 to state 1 by a reversible adiabatic process. Calculate the adiabatic work and the values of internal energy at state 2 and state 3arrow_forward12arrow_forward
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