A gas turbine power plant is combined with a regenerative steam power plant as shownin Figure B. Assume the bleeding steam from the turbine is 0.8 kg/s. Answer the following:[1] In terms of enthalpies only, find the steam flow rate (ms)[2] In terms of enthalpies only, find the flow rate ratio (m/m)[3] In terms of enthalpies and flow rate (ms), find the power of the steam turbine[4] State which pressure is higher, P4 or P7?[5] If T5 is known and the effectiveness of the heat exchanger is perfect, which temperaturewill be known also?C.C2Comp3GTmg 1Heat Exchanger5wwms478PumpST11y610FWH9Condenser1213Figure (B)

Step 1: finding the steam flow rate(m5) Step 2:finding the flow rate ratio Step 3:Finding the power…

Answered: A gas turbine power plant is combined…

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

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use steam tables in English units or EES. a. Saturated steam at 445 ⁰F is throttled adiabatically to 110 psia in a steady flow process. Calculate the lost work of the process if the surroundings are at temperature 70 ⁰F. [Answer: 68.9 Btu/lb.] b. Saturated steam 445 ⁰F is expanded reversibly and adiabatically in a turbine to 110 psia. Calculate the work of the turbine (= ideal work). [Note that some steam must condense. Answer: 811 Btu/lb.] c. What fraction of steam condensed in part b.? [Answer: 10%.]
(a) An Ocean Thermal Energy Converter (OTEC) pumps 200 m^3/s through a heat exchanger in which the temperature (expressed in Kelvins) drops by 1%. All the heat extracted is delivered to the ammonia boiler [11. The ammonia temperature. THT at turbine inlet is equal to the mean temperature of the water in the warm water heat exchanger minus 1 °K. The temperature, TCT, of the ammonia leaving the turbine is kept at 10 °C by the cooling effect of 250 m³/s of cold water. The efficiency of turbine/generator system is 90% of the Carnot efficiency of a heat engine working between THT and TCT . 12 MW of the produced electricity is used for pumping. Heat capacity of water is 4.2 MJ m³ K-1. Calculate the intake temperature of the warm water for the following cases: i) A total of 20 MW of electricity is available for sale? ii) The OTEC produces exactly equal to the amount of power needed for pumping?
a (a) Air in (b) (c) Diffuser Compressor Combustors 2 State State 1 80 State 2 3300 State 3 3200 State 4 400 State 5 80 wwww Pressure (kPa) 3 Turbine 4 Figure 1: Figure for Problem 2. In a modern jet engine, air passes through the following states from the inlet to the outlet, as shown in Figure 1: Product gases out 260 780 1500 900 640 K 5 > Nozzle justify them) to find the compressor specific work. Temperature (K) For this problem, you may neglect any heat transfer, as well as neglect kinetic energy except at the outlet (state 5). Use the tables for obtaining properties (do not assume constant specific heat). Assume air is an ideal gas with ideal gas constant of R = 0.287 kJ/kg-K. Use the appropriate conservation equations and make approximations (and In a similar manner, find the turbine specific work. And finally, using similar arguments, find the nozzle exit velocity.
A 2.00 mol sample of an ideal diatomic gas is taken through a reversible cycle A → B → C → A as shown in the figure below. Process A → B is isothermal expansion. For the cycle, calculate: a) the work done by the gas, b) the heat energy added to the gas, c) the heat energy exhausted by the gas, d) the thermal efficiency, e) the change in entropy of the gas. f) Determine the efficiency of a Carnot engine operating between the same temperature extremes, R = 8.314 J/mol K Data at vertices for the above PV diagram are as follow: PA = 5.00 x 105 Pa, VA = 1.00 x 10 -2 m3, PB = 1.25 x 105 Pa, VB = 4.00 x 10 -2 m3 PC = 1.25 x 105 Pa, VC = 1.00 x 10 -2 m3
Separate streams of steam and air flow through the turbine and heat exchanger arrangement shown in the figure below, where air enters location 5 at a rate of 1000 kg/min. The left turbine (Turbine 1) is able to produce 12,000 kW of power. Steady-state operating data are provided on the figure. Heat transfer with the surroundings can be neglected, as can all kinetic and potential energy effects. W2 = ? Turbine Turbine 2 P3 = 10 bar T3 = ? T2 = 400°C_ P2= 10 bar T = 240°C P4 = 1 bar Steam in P1 = 20 bar +6 T = 600°C www T5 = 1500 K -5 Ps = 1.35 bar Heat exchanger V T = 1200 K P6 = 1 bar Air in Determine: T3, in °C. • the mass flow rate of steam at 1, in kg/s. • the power output of the second turbine, in kW. • the magnitude of heat transfer between the steam and air, in kW. • the direction of the heat transfer (i.e., to the steam or from the steam).
Shown in the figure below is the cycle undergone by a Heat Pump. Your heat pump runs using 38.55 moles of monatomic Helium gas. At point a in the figure, the temperature is T₂ = 321 Kelvin and the pressure is Pa = 216000 Pascals. During the process a→b, the Volume of the system Quadruples. P Cv= Cp Y = C с a STATE a b isothermal P (Pa) b V Joules/(mole. K); Joules/(mole K); V (m³) T (K) PROCESS W (J) a-b b-c c-a Total Qhot = Qcold = Performance Coefficient = Joules; Joules; Q (J) AU (J) Activate Windows Go to Settings to activate Window
1 kg of steam at initial conditions of 5.1 MPa and 370 °C expands in a turbine until it becomes saturated. It is withdrawn and reheated to 340°C. After further expansion in the turbine to 160 , part of the steam is extracted for feedwater heating. The remaining steam expands to the condenser pressure of 0.018 MPa. find Wnet, Ec, Ee and the ideal steam rate. Remember, 1. For values taken from the steam tables: Use them as is, do not round off. 2. For values obtained by interpolation and final answers obtained by solving, use FOUR (4) decimal places. 3. PLEASE USE THE STEAM TABLE PROVIDED: https://drive.google.com/drive/folders/15t3WMv7xSTHmwXWXp0X2ZV6aYWhXuRCS?usp=sharing
Q1) Steam is supplied to a turbine at 30 bar and 350°C. The turbine exhaust pressure is 0.08 bar. The main condensate is heated regeneratively in two stages by steam bled from the turbine at 5 bar and 1.0 bar respectively. Calculate masses of steam bled off at each pressure per kg of steam entering the turbine and the theoretical thermal efficiency of the сycle. 1 kg Turbine 1- m- m2 0 1- m, 1- m,-m2 m. h, m2. h2 Condenser 1 kg twwww www meel 1 kg Heater-1 Drain cooler m, m,+ m2 (Н.P.) Heater-2 (L.P.)
10 kg/s of steam (H2O) enters a turbine at 10 m/s and a specific enthalpy of 3500 kJ/kg and leaves at an outlet 10m below the inlet with a specific enthalpy of 2500 kJ/kg and a velocity of 20 m/s. Assume steady-state steady-flow. If the heat lost from the turbine is 20% that of the turbine work, determine a.) the turbine horsepower. If the turbine is coupled to a generator with a 90% electrical efficiency, and the turbine horsepower has an 80% mechanical efficiency, b.) how much income will a power plant generate in one year if the electrical energy is sold at PhP 3.51 per kW-hr? (Hint: Mechanical efficiency = actual turbine work / ideal turbine work. Electrical efficiency of a generator = electrical output / actual turbine work.)
A condensing steam turbine is used to expand HPS (high pressure steam) polytropically from a pressure of 60 bar at 450 C to 2 bar at 150 C. Estimate a. turbine output steam temperature when the expansion is isentropic! Use the steam table in the Smith-Van Ness-Abbott book as a guide!b. Calculate the ideal and actual specific steam consumption! Use the steam table in the Smith-Van Ness-Abbott book as a guide!
This is a Diesel cycle Ideal gas model, constant specific heat R= 0.287 kj/kg-k Cv = 0.717 (kj/kg-k) Cp=1.004 [ kj/kg-k) gamma = 1.4 find entropy at each state s (kj/kg-k) at state 1 P1=200Kpa T1 =300K at state 2 P2=7000KPA T2=828.48K at state 3 P3=7000KPA T3=1500K at state 4 P4=459.16Kpa T4=688.74K Example @stATE 1 p1= 95 KPA t1 = 290K ANSWER : s1 = 1 kj/kg-k how it happen?
In a steam generator, a dry steam of (14 bar) enters the superheater which increase the steam temperature by (65 C) and reduce the flue gases temperature by (100 C°). Calculate the flue gases mass flow rate per (1 kg/s) of steam flow rate, if the specific heat capacity of the flue gases is (1.005 kj/kg.K).

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