The thermal arrangement of a 30,000 SHP power plant shown in Figure 1 is upgraded to...

  

 

 

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The thermal arrangement of a 30,000 SHP power plant shown in Figure 1 is upgraded to a regenerative cycle 30,000 SHP power plant as shown in Figure 2. In the regenerative cycle power plant, a breeding steam stream is taken from the crossover pipe between the HP and LP Q-490 h-1250 2.300 Q-1810 F.O.HTG 0-1050 SOOT BLWA Q-760 103.6 916-4 SYSTEM LOSS 0-900 650 PG h-1453.5 950F Q-177920 H.P. Q-175620 Q-163800 TURB. T.G. SET h 1481.2 Q-10920 MOTOR DRIVEN FEED PUMP SURGE TANK 1200 KW 0-10670 Q-50 L.P. TURS. 0-250 1921-4 OOK GLAND EXHAUST CONDENSER- h-64.7 Q-176276 200 F Q-594 MAKE UP FEED 0991 D CONO 1.5 HG ABS, Q-163558-196 125 F Q-FLOW, LB/HR h. ENTHALPY, BTU/LB 91.7 F Q=176276 EXHAUST FAN 200 F <<-294 200 F Q-1050 Figure 1 Thermal Arrangement of 30,000 SHP Power Plant h-1250 0-490 turibnes at 86.5 psia and 1,273 Btu/lb. After a pressure regulator, the steam stream becomes 50 psia to the deaerating feedwater tank. In the tank, the maxture of the feedwater is at the saturated state and the temperature is 281 °F (250.1 Btu/lb enthalpy). Obviously, bleeding steam from the crossover wil result in reduction of the horse power developed in the plant since less steam passes through the low pressure turbine. To compensate for the breeding and keep the same 30,000 SHP, the steam out of the boiler must be increased. h=1250 02309 0-1010 Q-490 F.O.MTG 0-1050 SOOT BLWR Q-760 SYSTEM LOSS 0-900 850PG ho1483.3 9507 he14 1.7 0-10920 Q₁ (INCREASED FLOW) MOTOR DRIVEN FEED PUMP T.G. SET H.P. TURB. 86.5 psia h-1273 DEAERATING FEEDWATER TANK 281 F h-250.1 1200 KW Q-10870 Q-50 Q₁ 50 psia L.P. TURS. 0-250- 1021-y GLAND EXHAUST CONDENSER h64.7 Q-176276 200 F Q-300 Q-594 CONO 1.5 HG ABS -Q-163550 ▬▬▬▬▬▬▬▬▬▬▬ -MAKE UP FEED 0991-0 21.7 F Q=176276 Q=196 125 F Q-FLOW, LB/HR h = ENTHALPY, BTU/L8 EXHAUST FAN h-1250 Q-490 200 F - Q-294 200 F Q-1050 Figure 2 Upgraded Regenerative Cycle 30,000 SHP Power Plant owing that the steam entering to the main condenser (1.5" Hg abs) is in saturated state and suming that Q, is the quantity of the steam bled in lb/hr and Q, is the increase in steam out o e boiler required in lb/hr, feed pump regain per pound of water is 6 Btu/lb, determine 1. Net heat input to the boiler, Btu/hr. 2. Fuel oil consumption, lb/hr, assuming fuel heating value of 18,546 Btu/lb and boiler efficiency of 88%. 3. Specific fuel rate, lb/shp-hr. The thermal arrangement of a 30,000 SHP power plant shown in Figure 1 is upgraded to a regenerative cycle 30,000 SHP power plant as shown in Figure 2. In the regenerative cycle power plant, a breeding steam stream is taken from the crossover pipe between the HP and LP Q-490 h-1250 2.300 Q-1810 F.O.HTG 0-1050 SOOT BLWA Q-760 103.6 916-4 SYSTEM LOSS 0-900 650 PG h-1453.5 950F Q-177920 H.P. Q-175620 Q-163800 TURB. T.G. SET h 1481.2 Q-10920 MOTOR DRIVEN FEED PUMP SURGE TANK 1200 KW 0-10670 Q-50 L.P. TURS. 0-250 1921-4 OOK GLAND EXHAUST CONDENSER- h-64.7 Q-176276 200 F Q-594 MAKE UP FEED 0991 D CONO 1.5 HG ABS, Q-163558-196 125 F Q-FLOW, LB/HR h. ENTHALPY, BTU/LB 91.7 F Q=176276 EXHAUST FAN 200 F <<-294 200 F Q-1050 Figure 1 Thermal Arrangement of 30,000 SHP Power Plant h-1250 0-490 turibnes at 86.5 psia and 1,273 Btu/lb. After a pressure regulator, the steam stream becomes 50 psia to the deaerating feedwater tank. In the tank, the maxture of the feedwater is at the saturated state and the temperature is 281 °F (250.1 Btu/lb enthalpy). Obviously, bleeding steam from the crossover wil result in reduction of the horse power developed in the plant since less steam passes through the low pressure turbine. To compensate for the breeding and keep the same 30,000 SHP, the steam out of the boiler must be increased. h=1250 02309 0-1010 Q-490 F.O.MTG 0-1050 SOOT BLWR Q-760 SYSTEM LOSS 0-900 850PG ho1483.3 9507 he14 1.7 0-10920 Q₁ (INCREASED FLOW) MOTOR DRIVEN FEED PUMP T.G. SET H.P. TURB. 86.5 psia h-1273 DEAERATING FEEDWATER TANK 281 F h-250.1 1200 KW Q-10870 Q-50 Q₁ 50 psia L.P. TURS. 0-250- 1021-y GLAND EXHAUST CONDENSER h64.7 Q-176276 200 F Q-300 Q-594 CONO 1.5 HG ABS -Q-163550 ▬▬▬▬▬▬▬▬▬▬▬ -MAKE UP FEED 0991-0 21.7 F Q=176276 Q=196 125 F Q-FLOW, LB/HR h = ENTHALPY, BTU/L8 EXHAUST FAN h-1250 Q-490 200 F - Q-294 200 F Q-1050 Figure 2 Upgraded Regenerative Cycle 30,000 SHP Power Plant owing that the steam entering to the main condenser (1.5" Hg abs) is in saturated state and suming that Q, is the quantity of the steam bled in lb/hr and Q, is the increase in steam out o e boiler required in lb/hr, feed pump regain per pound of water is 6 Btu/lb, determine 1. Net heat input to the boiler, Btu/hr. 2. Fuel oil consumption, lb/hr, assuming fuel heating value of 18,546 Btu/lb and boiler efficiency of 88%. 3. Specific fuel rate, lb/shp-hr.

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Income January 633333 February 633333 Total 1266667 Expenses January Re... View the full answer