more rankine examples

more rankine examples - Qin 2 boiler Win pump condenser 1...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Superheat Rankine Cycle Example Turbine pump condenser 1 2 3 4 Q out Q in W out W in boiler Consider the same Rankine power cycle as we analyzed before. But this time we are going to superheat the steam in the boiler before allowing it to enter the turbine at 6 MPa. The steam exits from the turbine will be 100% saturated vapor as shown. After condensing, saturated liquid enters the pump at a pressure of 0.1 MPa. Determine (a) the rate of heat transfer into the boiler per unit mass, (b) the net power generation per unit mass. (c) the thermal efficiency, T s 1 2 3 4
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
solution 4 44 (4) Let us analyze state 4 first, when the steam exits from the turbine 0.1( ), From saturated steam table C-2 s 7.3602( / ), 2675.5( / ) (1) Now look at the state 1 when the steam en gg PM P a s kJ kgK h h kJ kgK = == 11 3 1 ters the pump, again use C-2 s 1.3029( / ), 417.4( / ) 0.001043( / ) (2) From 1-2, the pump compressed the saturared liquid into compressed liquid The process is isentropic, s=const ff f s kJ kgK h h kJ kgK vv m k g 2 21 1 2 1 1 ant, therefore, from the Tds equation ,0 , , i n t Since the substance is compressed liquid, v=constant ( ) (0.001043)(6000 100) 6.15( / ) pump Tds dh vdP ds dh vdP egrate h h vdP h h vdP v P P kJ kg W hh =− = = = −= =
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 8

more rankine examples - Qin 2 boiler Win pump condenser 1...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online