Qin The engineering group proposed a new idea of going for overheating the vapor stage to produce more power. The condenser site was planned to leave as it is with the same parameters. The flow rates stays the same. See the figure below for the data. Again, this an ideal case: S2=S1; S3=S4. T1-155 C Boiler P1=36.29bar. W. Turbine Condenser Pump 3 P2=2.26 bar 2 T6=? 6. Qout T5=15C 5 Cooling water saturated liquid

Qin The engineering group proposed a new idea of going for overheating the vapor stage to produce more power. The condenser site was planned to leave as it is with the same parameters. The flow rates stays the same. See the figure below for the data. Again, this an ideal case: S2=S1; S3=S4. T1-155 C Boiler P1=36.29bar. W. Turbine Condenser Pump 3 P2=2.26 bar 2 T6=? 6. Qout T5=15C 5 Cooling water saturated liquid

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter47: High-pressure, Low-pressure, And Absorption Chilled-water Systems

Section: Chapter Questions

Problem 13RQ: The subcooling temperature in a condenser can be measured by taking the difference between the A....

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The condensing pressure for a Rankine engine is 0.001325 MPavac. Calculate the following for steam flow rate = 1 kg/sec of steam when the steam at the beginning of expansion is at 119.6 deg SH and 4.0 Mpaa. Draw the TS and equipment diagrams for the ideal and actual case and find for the following for the ideal case: Ideal turbine work (KW). Ans.____________________________ Heat rejected at condenser (KJ/sec). Ans.____________________________ Mass of cooling water in kg/sec if cp H2O = 4.18 KJ/kg-K, and inlet temp of water to condenser = 20 deg C, outlet temp is 35 deg C. Ans.____________________________ Pump work in KW. Ans.___________________________
The condensing pressure for a Rankine engine is 0.001325 MPavac. Calculate the following for steam flow rate = 16.3846 kg/sec of steam when the steam at the beginning of expansion is at 119.6 deg SH and 4.0 Mpaa. Draw the TS and equipment diagrams for the ideal and actual case and find for the following for the ideal case: Combined work (KW) . Ans.____________________________ Combined steam rate in kg/KW-hr. Ans.___________________________ Actual heat rate( KJ/KW-hr). Ans.____________________________
The condensing pressure for a Rankine engine is 0.001325 MPavac. Calculate the following for steam flow rate = 1 kg/sec of steam when the steam at the beginning of expansion is at 119.6 deg SH and 4.0 Mpaa. Draw the TS and equipment diagrams for the ideal and actual case and find for the following for the ideal case: Pump work in KW. Ans. Ideal heat rate in KJ/KW-hr. Ans. Rankine engine efficiency (%). Ans. Cycle thermal efficiency ( %). Ans
The condensing pressure for a Rankine engine is 0.001325 MPavac. Calculate the following for steam flow rate = 16.3846 kg/sec of steam when the steam at the beginning of expansion is at 119.6 deg SH and 4.0 Mpaa. Draw the TS and equipment diagrams for the ideal and actual case and find for the following for the ideal case: PV and TS diagrams of the cycle showing ideal and actual process lines Heat rejected at condenser (KJ/sec). Ans.____________________________ Mass of cooling water in kg/sec if cp H2O = 4.18 KJ/kg-K, and inlet temp of water to condenser = 20 deg C, outlet temp is 35 deg C. Ans.___________________________
Example 2 - Super-Reheat 3 TA high-P Low-P turbine turbine Rankine Cycle high-P 3 5 turbine 4 boiler] pump 6 condenser S We are going to add a low pressure turbine (5-6) to the system we just analyzed. Before going into the L-P turbine, the exit steam from the first turbine (3-4) is reheated in the boiler at a constant pressure. Assume both 4 & 6 are at 100% saturated vapor state and the vapor exiting from the H-P turbine (state 4) expands to a lower pressure of 2 MPa (P4-2 MPa) before it is being reheated at a constant pressure to the state 5. Recalculate (a) the thermal efficiency of the system. low-P turbine -
To produce more power the upper management decided to modify the power plant by placing the stage 2 as a saturated liquid stage. The condenser site was planned to leave as it is with the same parameters. The flow rates stays the same. See the figure below for the data. Again, this an ideal case: S2-S1; S3=S4. Boiler P1=36.29bar Lin Turbine Condenser P2=2.26 bar -2 Saturated vapor T6=? 6 Cour ||T5=15C 5 Cooling water Pump 3 saturated liquid
5. Sketch a Rankine eycle on T-s diagram and derive the thermal efficiency for a rankine eycle from its 4 steps. Show on T-S plot and discuss what is the effect of a. Increasing superheat b. decreasing condenser pressure c. Adding friction at pump and turbine