TITLE.PM5

538 ENGINEERING THERMODYNAMICS dharm \M-therm\Th11-2.pm5 The amount of excess air supplied varies with the type of the fuel and ...

FUELS AND COMBUSTION 539 dharm \M-therm\Th11-2.pm5 Stoichiometric air-fuel ratio by mass for combustion of petrol is (a) 5 (b) ...

540 ENGINEERING THERMODYNAMICS dharm \M-therm\Th11-2.pm5 What are secondary fuels? List some important secondary fuels. Write a ...

FUELS AND COMBUSTION 541 dharm \M-therm\Th11-2.pm5 The percentage composition of a sample of fuel was found to be C = 85%. H 2 ...

542 ENGINEERING THERMODYNAMICS dharm \M-therm\Th11-2.pm5 The analysis of the dry exhaust from and internal-combustion engine ga ...

12 Vapour Power Cycles 12.1. Carnot cycle. 12.2. Rankine cycle. 12.3. Modified Rankine cycle. 12.4. Regenerative cycle. 12.5. Re ...

544 ENGINEERING THERMODYNAMICS dharm \M-therm\Th12-1.pm5 Since there is no exchange of heat during isentropic operations (1-2) a ...

VAPOUR POWER CYCLES 545 dharm \M-therm\Th12-1.pm5 T s p 1 p 2 2 ′ 2 2 ′′ 4 3 1 ′′ 1 ′ 1 (b) p v 4 3 1 ′ 11 ′′ p 1 p 2 2 ′^22 ′′ ...

546 ENGINEERING THERMODYNAMICS dharm \M-therm\Th12-1.pm5 (iii)For condenser, we get h 2 = Q 2 + hf 3 ∴ Q 2 = h 2 – hf 3 ...(12.4 ...

VAPOUR POWER CYCLES 547 dharm \M-therm\Th12-1.pm5 Effect of Operating Conditions on Rankine Cycle Efficiency The Rankine cycle e ...

548 ENGINEERING THERMODYNAMICS dharm \M-therm\Th12-1.pm5 Condenser pressure Efficiency (c) Fig. 12.5. Effect of operating condit ...

VAPOUR POWER CYCLES 549 dharm \M-therm\Th12-1.pm5 1 Boiler Turbine 0.1 bar, 0.9 dry 0.09 bar 2 Saturated liquid 3 Wp 4 70 bar Q ...

550 ENGINEERING THERMODYNAMICS dharm \M-therm\Th12-1.pm5 (iv) Diameter of the pipe connecting turbine with condenser, d : π 4 d ...

VAPOUR POWER CYCLES 551 dharm \M-therm\Th12-1.pm5 Example 12.3. In a steam turbine steam at 20 bar, 360°C is expanded to 0.08 ba ...

552 ENGINEERING THERMODYNAMICS dharm \M-therm\Th12-1.pm5 T s 4 3 5 1 p = 80 bar 1 p = 0.1 bar 2 2 Fig. 12.8 [and hf 4 = 2.008 + ...

VAPOUR POWER CYCLES 553 dharm \M-therm\Th12-1.pm5 Actual pump work = 8072. ηpump = 8 072 08 . . = 10.09 kJ/kg Specific work (Wne ...

554 ENGINEERING THERMODYNAMICS dharm \M-therm\Th12-1.pm5 ∴ x 2 = 2104 521 809 − = 0.728 ∴ h 2 = hf 2 + x 2 hfg 2 = 151 ...

VAPOUR POWER CYCLES 555 dharm \M-therm\Th12-1.pm5 From steam tables : At 35 bar : h 1 = hg 1 = 2802 kJ/kg, sg 1 = 6.1228 kJ/kg K ...

556 ENGINEERING THERMODYNAMICS dharm \M-therm\Th12-1.pm5 (i)Final condition of steam ; (ii)Rankine efficiency ; (iii)Relative ef ...

VAPOUR POWER CYCLES 557 dharm \M-therm\Th12-1.pm5 ∴ mf = 5000 0 9 0 5 40000 0 85 0 98 /. bg ××× = 0.3335 kg/s or 1200.6 kg/h. (A ...