The figure shows an organic Rankine cycle plant using n-pentane as the working fluid. According to the system operating conditions given in the table a)Working fluid in the cycle mass flow rate [kg / s] b)Generated power in the turbine [kW] c)The amount of irreversibility in the turbine [kW] d)The power consumed in the pump [kW] e)Energy efficiency of the power plant f)Calculate the exergy efficiency of the plant. Note:The properties of the compressed liquid can be taken equal to the properties of the saturated liquid at a given temperature.

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Chapter3: Transient Heat Conduction
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The figure shows an organic Rankine cycle plant using n-pentane as the working fluid. According to the system operating conditions given in the table

a)Working fluid in the cycle mass flow rate [kg / s]

b)Generated power in the turbine [kW]

c)The amount of irreversibility in the turbine [kW]

d)The power consumed in the pump [kW]

e)Energy efficiency of the power plant

f)Calculate the exergy efficiency of the plant.

Note:The properties of the compressed liquid can be taken equal to the properties of the saturated liquid at a given temperature.

Flow
T (°C)
h(kJ/kg)
s(kJ/kg.K)
Fluid
phase
(КРа)
(kg/s)
no
1
300
120
water
12
compressed liquid
2
250
85
12
water
compressed liquid
3
468.8
90
saturated vapor
467.4
1.329
n-pentan
n-pentan
n-pentan
n-pentan
4
210
70
superheated vapor
438.8
1.332
5
210
59.2
saturated liquid
80.1
0.2541
468.8
59.2
80.27
0.2533
compressed liquid
compressed liquid
7
dead state
200
25
8.
dead state
200
30
compressed liquid
101.3
20
83.9
0.2962
dead state
dead state
compressed liquid
101.3
20
-13.61
-0.04507
dead state n-pentan
compressed liquid
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Transcribed Image Text:Flow T (°C) h(kJ/kg) s(kJ/kg.K) Fluid phase (КРа) (kg/s) no 1 300 120 water 12 compressed liquid 2 250 85 12 water compressed liquid 3 468.8 90 saturated vapor 467.4 1.329 n-pentan n-pentan n-pentan n-pentan 4 210 70 superheated vapor 438.8 1.332 5 210 59.2 saturated liquid 80.1 0.2541 468.8 59.2 80.27 0.2533 compressed liquid compressed liquid 7 dead state 200 25 8. dead state 200 30 compressed liquid 101.3 20 83.9 0.2962 dead state dead state compressed liquid 101.3 20 -13.61 -0.04507 dead state n-pentan compressed liquid Windows u ETkinleştir
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