Question: Show that the thermal efficiency of a combined gas-steam power plant ncc can be expressed as ncc = ng + ns ngns where ng

Show that the thermal efficiency of a combined gas-steam power plant ncc can be expressed as ncc = ng + ns – ngns where ng = Wg/Qin and ns = Ws/Qg, out there thermal efficiencies of the gas and steam cycles, respectively. Using this relation, determine the thermal efficiency of a combined power cycle that consists of a topping gas-turbine cycle with an efficiency of 40 percent and a bottoming steam-turbine cycle with an efficiency of 30 percent.

Step by Step Solution

★★★★★

3.42 Rating (155 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

It is to be demonstrated that the thermal efficiency of a combined gassteam power plant ncc can b... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

E-ME-T (2559).docx

120 KBs Word File

Students Have Also Explored These Related Mechanical Engineering Questions!

Show that the thermal efficiency of a combined gas-steam power plant ï¨cc can be expressed as where ï¨g = Wg /Qin and ï¨s = Ws /Qg,out are the thermal efficiencies of the...

The thermal efficiency of a general heat engine is 35 percent, and it produces 60 hp. At what rate is heat transferred to this engine, in kJ/s?

Show that any discrete-time signal x(n) can be expressed as where u(n - k) is a unit step delayed by k units in time, thatis, E Irik) xtk - Dluin -- k) x(n) u(n - k) = 10, otherwise

It can be shown that the thermal efficiency of a combined gas-steam power plant ï¨cc can be expressed in terms of the thermal efficiencies of the gas- and the steamturbine cycles as Prove...

Part a ( 9 0 / 1 0 0 ) a 1 - Consider a combined gas - steam power cycle similar to the figure below. The topping cycle is a simple Brayton cycle that has a pressure ratio of 7 . 5 ( P 8 P 7 ) . Air...

Consider the combined gas - steam power cycle shown in figure. The topping cycle is a gas - turbine cycle that has a pressure ratio of 8 . The gas turbine power is 5 0 0 MW . Air enters the...

Write a MATLAB program to analyze the combined gas-steam power plant shown below. The top cycle" generates 800 MW of power Air enters the compressor at 310 K, the combustion chamber at 700 K and the...

Also calculate heat rate for the cycle and power for the steam turbine only. Write a MATLAB program to analyze the combined gas-steam power plant shown below. The "top cycle" generates 800 MW of...

4 . Consider a combined gas - steam cycle power plant that consists of a simple Brayton cycle for the topping cycle and simple reheat Rankine cycle for the bottoming cycle. The net power produced by...

Q1.The gas-turbine cycle of a combined gas-steam power plant has a pressure ratio of 8. Air enters the compressor at 290K and the turbine at 1400K. The combustion gases leaving the gas turbine are...

Pick one layer and describe typical attacks in that layer and the controls that are employed in the layer to minimize the attack or vulnerability that leads to the attack. Layer 1: Physical; Layer 2:...

The following information comes from the accounts of James Company: Required a. There was $190,000 of sales on account during the accounting period. Write-offs of uncollectible accounts were $1,450....

Find r ' ( t ) . r ( t ) = e - t i 8 j 4 t e t k r ' ( t ) =

A heat pump driven by a 0.4 kW electric motor provides heating for a building on a day when the outside air is at 10C. The energy lost through the walls and roof at steady state is estimated to be at...

Why these commands are used in Matlab (10) 1. subplot (m, n, p) 2. text (x,y,text) 3. zeros(m,n) 4. size (A) 5. length(A)

13 This is part of Sian's homework. a Explain why Sian's method is wrong. b Work out the correct answer. Show all your working. Question The 10th term of a sequence is 243 The term-to-term rule is...

Use the following information in order to answer questions 5, 6 and 7. The trial balance for Nicon Limited as at 30 September 2012 is as follows: 110 Dr Cr 000 000 Revenue 57,678 Purchases 35,322...

Discuss using no more than 2 pages of single spacing What is financial market regulations? How banks and non-banking financial institutions are regulated? What is the purpose of financial regulation?...

Answer as soon as possible Problem 3-8 DuPont identity Lo3l Jiminy Cricket Removal has a profit margin of 9 percent, total asset turnover of 1.03, and ROE of 14.43 percent. Required: What is this...