Power-cycles

3. Operate at lower condenser of a Rankine Engine. P1=50 bar (saturated) P2=½bar=0.5 bar. Calculate the efficiency of cycle and engine using Mollier chart. Can you show step by steps solution using the formula given?

3. For the gas system power illustrated in Figure 3 (with the air-standard analysis assumptions), calculate thermal efficiency, back work ratio, and Weycle -10 P₁ = 100 kPa T₁ = 350 K Oia Heat exchanger Heat exchanger Qout T₁ - 1500 K Turbine Wycle 1 T₁ - 1500 K p= 1000 kPa p= 100 kPa T₁ = 350 K Figure 3. Operating condition of a gas power system cycle (The P-V and T-S diagram)

please written solution by hand and how can com h6 and s6 when  T turbine inlet = 130 C  , P heat exchanger = 20 bar , P condenser = 5 bar    , Tw . cond out = 25 C       Tw cond in = 17.5 C  efficiencies compressor = 67.5    efficiencies turbine = 78          m. refrig =0.4 kg/s

TOPIC: THERMODYNAMICS 2 (combined rankine cycle)  Plsss show the details of handwritten solution, with schematic and TS diagram. Thanksss! ❤️

Thermal engineering

6. Air as an ideal gas flows through the turbine and heat exchanger arrangement. Data for the two flow streams are shown on the figure. Heat transfer to the surroundings can be neglected, as can all kinetic and potential energy effects. Determine T3, in K, and the power output of the second turbine, in kW, at steady state.

Subject: Combustion Engineering   A rankine cycle has the specific conditions: Inlet of turbine: T= 368 degree celcius p= 11.17 mPa condenser pressure= 550 kpa   For specific volume and density, use steam table. g= 9.81 m/s²   Consider water to be incompressible, do not neglect the pump work. For below parameters:   mass flow rate= 1.5 kg/s length (L) in meters diameter (D) in meters L= 4D-1 meters   What is the value of the diameter (except 0) in cm that will give the maximum headloss?

ZV7 ZAIN IQ BigBlueButton - Reheat.. t014.rna1.blindsidenetworks.com 37:28 Rankine Cycle ... Ali Khaleel Kareem O Homework Example 2: 2.6 (Page 45) In a stream power plant, the steam mass flow rate is 80ton/h, the steam inters the turbine at 6MPA and 480 °C, condenser pressure = 0.06MPA, mechanical and electrical efficiencies are 0.96 & 0.95, respectively. Find the specific steam consumption and the power output. Example 3: 2.7 (Page 46) Find the cycle efficiency and specific steam consumption of a reheat cycle (Error! Reference source not found.) operating between pressures of 3MPA and 0.004MPA, with superheat temp of 450 °C. Assume that the first expansion is carried out to the point where the steam is dry saturated and then the steam is reheated to the original superheat temp. The feed pump term may be neglected.

A four-cylinder four-stroke petrol engine with the following specifications: - The bore(diameter) = 20 cm - The stroke = 30 cm - The compression ratio = 8 - The indicated power = 33 KW - The engine speed = 2500 rpm - The indicated thermal efficiency = 35% - The friction power = 25 kW - The calorific value ( heating value) = 42000 kJ/kg . Determine the following: a) The indicated mean effective pressure. b) Thermal efficiency. c) Specific fuel consumption per hour. d) The Torque (given K = 1.4)

Air passes from a fan exit into a turbofan engine core at the rate of 62 kg/s. The air then passes through a gas generator compressor, combustion chamber and turbine and then through a low pressure turbine which drives the fan on a separate shaft. This figure shows the arrangement and station numbers. M The engine component details are listed below: Fan Exit pressure 160.054 kPa Exit temperature 332.22K Power required 11.540 MW Gas generator compressor Pressure ratio 19.5 Isentropic efficiency 88.0% Pressure loss 4% of c-c inlet P Combustion chamber (c-c) Exit gas temperature 1620K Combustion efficiency 98.8% Fuel calorific value 43300 kJ/kg Isentropic efficiency 87.0% Gas generator turbine Mechanical efficiency 90.5 LP turbine (driving fan) Isentropic efficiency 83.0%

2 A six-cylinder, four-stroke, direct-injection oil engine is to deliver 120 kW at 1600 rpm. The fuel to be used has a calorific value of 43 M.J/kg and its percentage composition by mass is carbon 86.0%, hydrogen 13.0%, non combustibles 0%. The absolute volumetric efficiency is assumed to 80%, the indicated thermal efficiency 40% and the mechan- ical efficiency 80%. The air consumption to be required for theoretically correct e 1100 in excess of that (i) Estimate the volumetric comp Jlf of dry exhaust gas (ii) Determine the bore and stroke of t he engine, taking a stroke to bore ratio as 1.5. Assume the volume of 1 kg of air at the given conditions as 0.77 m3. Oxygen in air is 23% by mass and 21% by volume.

Calculate the power in the compressor, W(kW) Calculate the power-heat in the exchanger, Q(kW) Calculate the power in the turbine, W(kW)

3. Solve this using explaining step by step solution in words (detailed). Draw also a graph.

The Lithium Bromide water absorption cycle shown in the figure operates at the following temperatures: Generator, 5°C; Condenser, 35°C; Evaporators, 5°C; and Absorber, 30°C. The flow rate of solution delivered by the pump is 0.4 kg/sec. Determine the following:  What is the amount of heat, in kilowatts, rejected at the absorber? a. 71.8 b. 287.4 c. 205.3 d. 146.4 e. 104.5 What is the Absorber System Coefficient of Performance, in percentile? a. 146.4 b. 71.8 c. 205.3 d. 104.5 e. 287.4 What is the mass flow rate, in kg/sec, of the fluid at line 5? a. 0.129 b. 0.252 c. 0.180 d. 0.353 e. 0.092

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.___________________________

Q: During a steam generator performance test, the following datawere recorded:Fuel Data: Coal mass flow rate = 2.5 kg/s; HVC = 32.5 MJ/kgSteam Data: Pressure = 13 bar; quality = 99% dry; mass flow rate =25kg/sFeed water data: saturated at 50oC.Calculate the boiler efficiency

Answer the sub parts (iv) and (v) only.

5. Steam is generated at 6.10 MPa and 450OC and condensation occurs at 170 kPa. (a)For a Rankine engine operating between these limits, compute the thermal efficiency and the heat rate. (b) Considering that a Rankine cycle occurs between the limits, determine QA, QR, WNet, and eC. (c) What mass flow rate is required for a net output of 35 MW? Please answer what is asked in a, b and c. Thanks

If the Rankine cycle shown in the figure is an "Ideal Rankine cycle", what assumptions do you typically make? Select all that apply: Turbine Boiler Condenser - Qout (KL: 45 sec) (Chien-Ming: 1 min) RR: up to 1min NT = 100% O Wr > Wp O State 4 is a saturated liquid O X3 = 1

Power generation using steam is one of the most common method which can be found around the world. In these type of power plants, steam goes through a basic thermodynamic cycle called Rankine cycle which is shown in the following figure. Steam flow Boiler Qin Pump Wout Win Condenser •Qout For the proper operation of the cycle, water should be pumped to the boiler using pump which required work input (Wm) generate steam and then high pressure steam is fed to the turbine. By extracting the energy from high pressure steam, turbine is producing work output (Wout). Because of this, the steam pressure is reduced and low pressure steam is flowing into the condenser. Condenser removes heat energy from steam further (Qout) and steam is converted into liquid water. The liquid water can be pumped into the boiler again and the cycle continues. Performance of a Ranking cycle can be evaluated by using thermal efficiency (nth)which is determined from; the cycle. Heat energy should be supplied to the…

Pls answer thank you! The following data were obtained during performance test with a simple open cycle gas turbine engine: compressor inlet temperature, 520*R: compressor isentropic discharge temperature, 672"R: actual compressor discharge temperature, 691"R: turbine inlet temperature, 1500 R: turbine isentropic discharge temperature. 1184"R: and turbine actual discharge temperature, 1216°R. For these conditions calculate the thermal efficiency in percent.

1.) The ratio of the pressures in an Ericsson Cycle is 8. Determine the Thermal Efficiency in % 2.) The compression ratio of a Stirling Cycle is 11. What is the thermal efficiency in %? 3.) The compression ratio of a Stirling Cycle is 4. Heat is rejected at 90C. What is the highest temperature in the cycle in Celcius? ANSWER SHOULD BE ROUND OFF IN SIX SIGNIFICANT FIGURES

Please see question in pic thank you

26. At the design speed the following data apply to a gas turbine set employing the heat exchanger : Isentropic efficiency of compressor = 75%, isentropic efficiency of the turbine = 85%, mechanical transmission effi- ciency = 99%, combustion efficiency = 98%, mass flow = 22.7 kg/s, pressure ratio = 6 : 1, heat exchanger effectiveness = 75%, maximum cycle temperature = 1000 K. The ambient air temperature and pressure are 15°C and 1.013 bar respectively. Caleulate : (i) The net power output (iii) Thermal efficiency of the cycle. Take the lower calorific value of fuel as 43125 kJ/kg and assume no pressure-loss in heat exchanger and combustion chamber. (ii) Specific fuel consumption (Ans. (i) 2019 kW (iü) 0.4799 kg/kWh (iii) 16.7%)

I need answer typing clear urjent

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.____________________________

A gas turbine power plant working on Brayton cycle as per the following specifications Pressure and temperature of air at inlet to compressor = 1 bar and 10oC Power output of the plant = 8 MW Temperature at inlet to the turbine = 780 oC Pressure ratio = 12 Isentropic efficiency of compressor = 100% Isentropic efficiency of turbine = t(%)= 91 Perform the following: 1) Pressure, specific volume and temperatures at all the points of the cycle? 2) Mass flow rate required?

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The following is part of a power cycle; the purpose of this cycle is to generate work to run an electrical generator. R-410A is the working fluid. The turbine generates enough work to run the compressor and to send work to the electrical generator (Wnet). Determine the cycle efficiency.