Question #$1$:

In an ideal reversible non$-$ regenerative steam cycle the initial steam pressure

and temperature are $150$ bar and $500C$ respectively, and the condenser

pressure is $0\mathrm{.}04$ bar. If the work input to the feed pump may not be

neglected.

a$)$ Draw a box $($schematic$)$ diagram showing all components of the plant.

b$)$ Sketch a T$-$S & h$-$s diagram for the complete cycle.

c$)$ Calculate the cycle thermal efficiency for the following cases:

$1-$ When there is no reheating

When the steam is reheated to $500C$ at $60$ bar.

Question #$2$:

If a single stage regenerative FWH $($of the open type$)$ was added to the cycle

of a steam power plant having terminal conditions $\frac{15}{b}ar,300C$ and $0\mathrm{.}07$

bar.

If the steam was extracted to the heater feed water at a pressure is $1\mathrm{.}7$ bar

Determine the percentage efficiency improvement in this power plant as a

result of adding the FWH$.$

Assume an isentropic expansion turbine and pump work may be neglected.

Question #$3$:

A steam cycle with H$.$P & L$.$P turbines separated by a water extractor. Live

steam conditions $400C,70$ bar. Pressure at entry to extractor $1$ bar.

High pressure turbine internal efficiency is $86\%.$

Low pressure turbine internal efficiency is $75\%.$

Estimated extraction efficiency $50\%$ with $0\mathrm{.}34$ bar loss of pressure in the

water extraction process. If the Condenser pressure is $0\mathrm{.}034$ bar:

Draw a box$-$diagram of the cyele.

Sketch the cycle on a T$-$s diagram.

Calculate the thermal efficiency of the cycle.

In an ideal reversible non$-$ regenerative steam cycle the initial steam pressure

and temperature are $150$ bar and $500C$ respectively, and the condenser

pressure is $0\mathrm{.}04$ bar. If the work input to the feed pump may not be

neglected.

a$)$ Draw a box $($schematic$)$ diagram showing all components of the plant.

b$)$ Sketch a T$-$S & h$-$s diagram for the complete cycle.

c$)$ Calculate the cycle thermal efficiency for the following cases:

$1-$ When there is no reheating

$2-$ When the steam is reheated to $500C$ at $60$ bar.