Question 1. [5 marks]

A power generation

plant is as illustrated

in the figure below.

On the right (above),

thermodynamic data

A

to

Boler

Pump

Location

Leaving boiler

Entering turbine

Leaving turbine,

entering condenser

Leaving condenser.

entering pump

Pump work= 4 kJ/kg

Turbine

Ⓡ

Pressure

2.0 MPa

1.9 MPa

15 kPa

14 kPa

b. Turbine work.

c. Heat transfer in the condenser.

d. Heat transfer in the boiler.

Condenser >- given:

Temperature

or Quality

300°C

290°C

90%

45°C

are provided for

such a power

plant. In addition

from the steam

tables the

following are

h1 = 3023.5

kJ/kg

h2 = 3002.5 kJ/kg

h3 = 226.0+ 0.9(2373.1) = 2361.8 kJ/kg

h4 = 188.5 kJ/kg

No changes in kinetic or potential energy will be

considered in the solution.

Calculate the following quantities per kilogram

flowing through the unit:

a. Heat transfer in the line between the boiler and

turbine.