A power cycle operating between two 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 the cases below you will be asked to determine the cycle n and whether the cycle operates Reversibly, Irreversibility, or is Impossible. Assume: Сycle Сycle Сycle n = nCarnot п< псarnot п > nCarnot 1. The maximum thermal efficiency nCarnot for the cycle is equal to а. 0.2 b. 0.8 с. 1.0 d. none of the above. 2. If QH = 1100 kJ and the Weycle = 900 kJ then the cycle is Reversible b. Irreversible c. Impossible d. none of the above. а. 3. If QH = 1000 kJ and Qc = 200 kJ then the cycle is a. Reversible b. Irreversible c. Impossible d. none of the above. 4. If Wcycle 1400 kJ and Qc= 600 kJ then the cycle is

Elements Of Electromagnetics
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A power cycle operating between two reservoirs receives energy \( Q_H \) by heat transfer from a hot reservoir at \( T_H = 2000 \, \text{K} \) and rejects energy \( Q_C \) by heat transfer to a cold reservoir at \( T_C = 400 \, \text{K} \). For the cases below you will be asked to determine the cycle \( n \) and whether the cycle operates Reversibly, Irreversibly, or is Impossible.

**Assume:**

\( n = n_{Carnot} \) Cycle _________  
\( n < n_{Carnot} \) Cycle _________  
\( n > n_{Carnot} \) Cycle _________  

**1.** The maximum thermal efficiency \( n_{Carnot} \) for the cycle is equal to  
a. 0.2  
b. 0.8  
c. 1.0  
d. none of the above.

**2.** If \( Q_H = 1100 \, \text{kJ} \) and the \( W_{cycle} = 900 \, \text{kJ} \) then the cycle is  
a. Reversible  
b. Irreversible  
c. Impossible  
d. none of the above.

**3.** If \( Q_H = 1000 \, \text{kJ} \) and \( Q_C = 200 \, \text{kJ} \) then the cycle is  
a. Reversible  
b. Irreversible  
c. Impossible  
d. none of the above.

**4.** If \( W_{cycle} = 1400 \, \text{kJ} \) and \( Q_C = 600 \, \text{kJ} \) then the cycle is  
a. Reversible  
b. Irreversible  
c. Impossible  
d. none of the above.

**5.** If \( n = 50\% \) then the cycle is  
a. Reversible  
b. Irreversible  
c. Impossible  
d. none of the above.
Transcribed Image Text:A power cycle operating between two reservoirs receives energy \( Q_H \) by heat transfer from a hot reservoir at \( T_H = 2000 \, \text{K} \) and rejects energy \( Q_C \) by heat transfer to a cold reservoir at \( T_C = 400 \, \text{K} \). For the cases below you will be asked to determine the cycle \( n \) and whether the cycle operates Reversibly, Irreversibly, or is Impossible. **Assume:** \( n = n_{Carnot} \) Cycle _________ \( n < n_{Carnot} \) Cycle _________ \( n > n_{Carnot} \) Cycle _________ **1.** The maximum thermal efficiency \( n_{Carnot} \) for the cycle is equal to a. 0.2 b. 0.8 c. 1.0 d. none of the above. **2.** If \( Q_H = 1100 \, \text{kJ} \) and the \( W_{cycle} = 900 \, \text{kJ} \) then the cycle is a. Reversible b. Irreversible c. Impossible d. none of the above. **3.** If \( Q_H = 1000 \, \text{kJ} \) and \( Q_C = 200 \, \text{kJ} \) then the cycle is a. Reversible b. Irreversible c. Impossible d. none of the above. **4.** If \( W_{cycle} = 1400 \, \text{kJ} \) and \( Q_C = 600 \, \text{kJ} \) then the cycle is a. Reversible b. Irreversible c. Impossible d. none of the above. **5.** If \( n = 50\% \) then the cycle is a. Reversible b. Irreversible c. Impossible d. none of the above.
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