25. In a gas turbine plant, air is compressed through a pressure ratio of 6 : 1 from 15°C. It is then heated to the maximum permissible temperature of 750°C and expanded in two stages each of expansion ratio V6 , the air being reheated between the stages to 750°C. A heat exchanger allows the heating of the compressed gases through 75 per cent of the maximum range possible. Calculate : (i) The cycle efficiency (ii) The work ratio (iii) The work per kg of air. The isentropic efficiencies of the compressor and turbine are 0.8 and 0.85 respectively. (Ans. (i) 32.75% (ii) 0.3852 (iii) 152 kJ/kg)

25. In a gas turbine plant, air is compressed through a pressure ratio of 6 : 1 from 15°C. It is then heated to the maximum permissible temperature of 750°C and expanded in two stages each of expansion ratio V6 , the air being reheated between the stages to 750°C. A heat exchanger allows the heating of the compressed gases through 75 per cent of the maximum range possible. Calculate : (i) The cycle efficiency (ii) The work ratio (iii) The work per kg of air. The isentropic efficiencies of the compressor and turbine are 0.8 and 0.85 respectively. (Ans. (i) 32.75% (ii) 0.3852 (iii) 152 kJ/kg)

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

Related questions

Q: The Stirling cycle, shown in the figure, is useful to de power systems. Find the efficiency of the…

A: GivenThe strirling cycle

Q: Design, analyze, and optimize a triple pressure heat recovery steam generator (HRS arge advanced…

Q: It has been decided to operate a steam power station on a Rankine Cycle with a relatively high…

A: Process 1 - 2 : Isentropic expansion process (Turbine).Process 2 - 3 : Constant pressure heat…

Q: steam power plant operates on the basis c 40091 ass out pas ! 01 ndopcor. The turb

A: Given: The pressure limit in the condenser is, P1=15 KPa. The pressure limit in the boiler is, P2=10…

Q: ankine cycle using superheat and reheat applications. Steam enters the stage 1 turbine at 8 MPa and…

A: To determine: : A) the thermal efficiency of the cycle, B) the mass flow rate of the steam, C) the…

Q: Consider the operation an ideal Brayton cycle used for electrical power generation with air as the…

A: A Brayton cycle is a thermodynamic cycle which involves two isentropic processes and two isobaric…

Q: A gas turbine power plant operates on a simple thermodynamic cycle. The ambient conditions are 100…

A: NOTE:- As per our company guidelines we are supposed to answer only first 3 sub-parts. Kindly repost…

Q: Water is the working fluid in an ideal Rankine cycle with regeneration. All steam enters the first…

A: Initial conditions State 1 P1 = 12 MPa T1 = 520 °C Enthalpy h1 = 3404 kJ/kg Entropy S1 = 6.5584…

Q: (a) A simple Rankine cycle uses water as the working fluid (Figure Q3). IN gin 4s 4 gout Figure Q3.…

A: Since you have asked a question with multiple parts in a single request we would be answering only…

Question

25. In a gas turbine plant, air is compressed through a pressure ratio of 6 : 1 from 15°C. It is then heated to the
maximum permissible temperature of 750°C and expanded in two stages each of expansion ratio V6 , the
air being reheated between the stages to 750°C. A heat exchanger allows the heating of the compressed
gases through 75 per cent of the maximum range possible. Calculate : (i) The cycle efficiency (ii) The work
ratio (iii) The work per kg of air.
The isentropic efficiencies of the compressor and turbine are 0.8 and 0.85 respectively.
[Ans. (i) 32.75% (ii) 0.3852 (ii) 152 kJ/kg]

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Step 5

Trending now

This is a popular solution!

Step by step

Solved in 5 steps with 5 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

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

How does the a Regenerative Rankine Cycle improve the simple rankine cycle? How much improvement in efficiency is gained? What are the disadvantages of a Regenerative Rankine Cycle? What are the Difference of a Open Heater to a Closed heat exchanger?
A gas turbine power plant operates on a simple thermodynamic cycle. The ambient conditionsare 100 kPa and 24 °C. The air at this condition enters the engine at 150 m/s whose diameteris 0.5 m. The pressure ratio across the compressor is 18 k and the temperature at the turbineinlet is 1400 K. Assuming ideal operation for all components and specific heats for air andproducts separately. In addition, neglect the mass of fuel burned. Do the followings:a. Choose the suitable thermodynamic cycleb.Draw pv and Ts diagram and label itCalculate the power required by the compressordDetermine the pressure and the temperature at the turbine exit,Compute the power produced by the turbinef.Available specific workg.The thermal efficiency
A steam turbine is supplied with steam at a pressure of 100 bar, and exhausts to a condenser at a pressure of 0.10 bar. The turbine efficiency is at 70%. Detemine the Rankine cycle efficiency when the initial steam condition is superheated to 400°C.
Ocean thermal energy conversion (OTEC) plants use the temperature difference in the ocean (80°F at the surface and 40°F at 2000 ft. depth) in a Rankine cycle to generate electricity. Ammonia is the working fluid. Ammonia is boiled using the 80°F surface water, and condensed against the 40°F deep water, which is pumped to the surface. Very large heat exchangers are required, due to the small LMTDs and the low plant thermal efficiency (2.5%). The heat exchangers will comprise 40 % of the plant cost. In order to reduce the condenser cost, we will evaluate the condenser tube material savings provided by the use of a vertical fluted "Gregorig" condensing surface. The reference smooth tube condenser design uses 1.0 in. I.D. aluminum tubes, 0.062 in. wall x 30 ft. long. Sea water flows on the tube-side at 8 ft/sec. Ammonia condenses at 50°F on the outer surface of the vertical tubes with 4Tvs = 4°F. The ammonia properties at 48°F are: p= 39.1 lbm/ft³, k₁= 0.307 Btu/hr-ft- °F, и 1.426 × 10-2…
Assuming a compression ignition engine having a cut-off ratio of 2 and a compression ratio of 20. Before the compression stroke, air is at 100kPa, 20°C and a volume of 500 cm³. Determine (in kPa) the mean effective pressure of the cycle
A Brayton cycle is used to estimate the performance of an aircraft engine with nitrogen as the working fluid. The engine generates a net power of 10 MW. Nitrogen enters the compressor of the engine at 250 K and 80 kPa and is compressed to a pressure of 400 kPa. The gas exits the turbine of the engine at 450 K and 80 kPa.a. Calculate the mass flow rate of nitrogen through the engine.b. Calculate the thermal efficiency of the cycle.c. Determine the irreversibility per unit mass for each process and for the cycle if TH = 1500 K and TL = To = 250 K.d. Which process has the largest irreversibility?
Four stroke compression ignition engine operating on ideal Diesel cycle with air as the working fluidhas a compression ratio of 20 and a cutoff ratio of 1.3. At the beginning of the compression process, theworking fluid is at 100 kpa, 40 C, and 120 m3. This engine is operated at 2500 rpm. Assuming cold-airstandard assumptions, determine the following:(a) The net-power output (kW), The thermal efficiency, The mean effective pressure (kPa)(b) The mean effective pressure (kPa) and net-power output (kW) in the cycle if a two stroke engine isbeing used.