Homework Help is Here – Start Your Trial Now!
Engineering
Mechanical Engineering
A combined cycle power plant uses mercury (Hg) for the high-temperature cycle (topping cycle shown in blue) and water (or steam) for the lower-temperature cycle (bottoming cycle shown in red), as in Fig. Q 2(a), where the temperatures and pressures are shown. The maximum temperature in the steam cycle (bottoming cycle) is where the steam leaves the superheater at state point 4 where it is 500°C. The mercury is dry saturated vapour at the inlet of mercury turbine. Sketch the schematic diagram again. Draw the cycle on T-s diagram by noting the corresponding state points designated by 1, 2,. and a, b,. on the schematic diagram. (Hint: Overlap both T-s diagrams on each other by considering the temperatures, not the pressures.) List all the assumptions before your analysis. Assume the mercury feed pump work input is very small. Determine: (a) the ratio of the mass flow rate of mercury to the mass flow rate of water in the heat exchanger that condenses mer- cury and boils the water, and (b) the thermal efficiency of this combined ideal cycle. The following Table Q 2 shows the saturation properties for mercury (Hg):

A combined cycle power plant uses mercury (Hg) for the high-temperature cycle (topping cycle shown in blue) and water (or steam) for the lower-temperature cycle (bottoming cycle shown in red), as in Fig. Q 2(a), where the temperatures and pressures are shown. The maximum temperature in the steam cycle (bottoming cycle) is where the steam leaves the superheater at state point 4 where it is 500°C. The mercury is dry saturated vapour at the inlet of mercury turbine. Sketch the schematic diagram again. Draw the cycle on T-s diagram by noting the corresponding state points designated by 1, 2,. and a, b,. on the schematic diagram. (Hint: Overlap both T-s diagrams on each other by considering the temperatures, not the pressures.) List all the assumptions before your analysis. Assume the mercury feed pump work input is very small. Determine: (a) the ratio of the mass flow rate of mercury to the mass flow rate of water in the heat exchanger that condenses mer- cury and boils the water, and (b) the thermal efficiency of this combined ideal cycle. The following Table Q 2 shows the saturation properties for mercury (Hg):

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
See similar textbooks
icon
Related questions
Question

q2

A combined cycle power plant uses mercury (Hg) for the high-temperature cycle (topping cycle shown in blue) and water (or steam) for the lower-temperature cycle (bottoming cycle shown in red), as in Fig. Q 2(a), where the temperatures and pressures are shown. The maximum temperature in the steam cycle (bottoming cycle) is where the steam leaves the superheater at state point 4 where it is 500°C. The mercury is dry saturated vapour at the inlet of mercury turbine. Sketch the schematic diagram again. Draw the cycle on T-s diagram by noting the corresponding state points designated by 1, 2,.. and a, b,.. on the schematic diagram. (Hint: Overlap both T-s diagrams on each other by considering the temperatures, not the pressures.) List all the assumptions before your analysis. Assume the mercury feed pump work input is very small. Determine: (a) the ratio of the mass flow rate of mercury to the mass flow rate of water in the heat exchanger that condenses mer- cury and boils the water, and (b) the thermal efficiency of this combined ideal cycle. The following Table Q 2 shows the saturation properties for mercury (Hg): Table Q 2 Tg hf Sf Sg kJ/(kg-K) 0.6073 MPa °C kJ/kg kJ/kg kJ/(kg-K) 0.04 309 42.21 335.64 0.1034 1.60 562 75.37 364.04 0.1498 0.4954 H,O H,0 260°C; 4.688 MPa Steam turbine 562°C; 1.6 MPa Wnet.ST Hg W. Mercury turbine net.MT 10 kPa 5 Condenser Mercury condenser and steam boiler 10 kPa 1 a 309°C; 0.04 MPa Hg Pump Pump b. Fig. Q 2 (a): Schematic diagram of the combined Hg-H,0 cycle. Steam superheater and mercury boiler www www
Transcribed Image Text:A combined cycle power plant uses mercury (Hg) for the high-temperature cycle (topping cycle shown in blue) and water (or steam) for the lower-temperature cycle (bottoming cycle shown in red), as in Fig. Q 2(a), where the temperatures and pressures are shown. The maximum temperature in the steam cycle (bottoming cycle) is where the steam leaves the superheater at state point 4 where it is 500°C. The mercury is dry saturated vapour at the inlet of mercury turbine. Sketch the schematic diagram again. Draw the cycle on T-s diagram by noting the corresponding state points designated by 1, 2,.. and a, b,.. on the schematic diagram. (Hint: Overlap both T-s diagrams on each other by considering the temperatures, not the pressures.) List all the assumptions before your analysis. Assume the mercury feed pump work input is very small. Determine: (a) the ratio of the mass flow rate of mercury to the mass flow rate of water in the heat exchanger that condenses mer- cury and boils the water, and (b) the thermal efficiency of this combined ideal cycle. The following Table Q 2 shows the saturation properties for mercury (Hg): Table Q 2 Tg hf Sf Sg kJ/(kg-K) 0.6073 MPa °C kJ/kg kJ/kg kJ/(kg-K) 0.04 309 42.21 335.64 0.1034 1.60 562 75.37 364.04 0.1498 0.4954 H,O H,0 260°C; 4.688 MPa Steam turbine 562°C; 1.6 MPa Wnet.ST Hg W. Mercury turbine net.MT 10 kPa 5 Condenser Mercury condenser and steam boiler 10 kPa 1 a 309°C; 0.04 MPa Hg Pump Pump b. Fig. Q 2 (a): Schematic diagram of the combined Hg-H,0 cycle. Steam superheater and mercury boiler www www
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 7 steps with 1 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Strain Energy
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.
Similar questions
Recommended textbooks for you
Elements Of Electromagnetics
Elements Of Electromagnetics
Mechanical Engineering
ISBN:
9780190698614
Author:
Sadiku, Matthew N. O.
Publisher:
Oxford University Press
Mechanics of Materials (10th Edition)
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:
9780134319650
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Thermodynamics: An Engineering Approach
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:
9781259822674
Author:
Yunus A. Cengel Dr., Michael A. Boles
Publisher:
McGraw-Hill Education
Control Systems Engineering
Control Systems Engineering
Mechanical Engineering
ISBN:
9781118170519
Author:
Norman S. Nise
Publisher:
WILEY
Mechanics of Materials (MindTap Course List)
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:
9781337093347
Author:
Barry J. Goodno, James M. Gere
Publisher:
Cengage Learning
Engineering Mechanics: Statics
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:
9781118807330
Author:
James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:
WILEY
SEE MORE TEXTBOOKS