[2] Repeat Example 8.1 (pages 303-305) but with the following exceptions: steam fed to the turbine is at 9,000 kPa & 600 °C, the turbine exhaust is at 10 kPa, and for parts b & c the efficiencies are both 0.8.
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- Steam is supplied to a two-stage turbine at 48 bar and 400 °C. It expands in the firstturbine until it is just dry saturated, then it is re-heated to 400 °C and expandedthroughthe second-stage turbine. The condenser pressure is 0.04 bar what is the pressure in bar at state 4 to 3 decimal places? what is the specific entropy in kJ/kg-K for state 5 to 4 d.p.?For R-22 Find the capacity of the compressor if the suction line mentioned , p=1.2 bar ,Mass flow rate equal 0.3 Kg/S and discharge line mention at super heated of 100 Celsius.3.43 A boiler feed pump delivers 0.05 m³/s of water at 240°C, 20 MPa. What is the mass flowrate (kg/s)? What would be the percent error if the properties of saturated liq- uid at 240°C were used in the calculation? What if the properties of saturated liquid at 20 MPa were used?
- Q2//The rotational-speed of an impulse turbine wheel is 3000 r.p.m. The nozzles are inclined at 20° and their efficiency is 0.89. The isentropic heat drop for the stage is 159 kJ/kg. If the blade speed ratio is 0.4, the blade speed coefficient is 0.82, and the blade efficiency is 0.76. Find for steam flow rate of 15 kg/s: 1. The mean blade ring diameter. 2. The power developed by the stage. B = 32.4°:Be : 38.5°). %3D %3D Answer (1.355m, 1613.2 kW,Student N 440 "C and p 1.5 bar, T; 160 C. The mass fowrate is 60 kgs Conditions in the inlet and evt of a team turhine are measured as p a) Assume the turbine is well insulated such that he creanao crocess is adiabatic. Calculate e power developed by the turbine, kW. b) Estimate that heat transfer rate from the steam to the environment is 2.5% of the net actual power developed and calculate this power developed by the turbine under this assumpbion. Potential and kinetic energy effects can be ignored.Ans. 3908 m/min. 14.5 Find the cylinder dimensions of a single-cylinder, double-acting compressor handling 28.32 e/revolution of air from 99.975 kPaa to 723.954 kPaa. Compression and reexpansion are in accordance with PV135 = C. Use the conventional volumetric efficiency; c = 5% and L/D = 1. %3D %3D
- You have invented a hydrogen‐fueled turbine engine that operates between a combustion temperature of 2500. K and an exhaust manifold temperature of 500. K. How much work does it produce per kilojoule of fuel energy if it operates at 75% of maximum theoretical efficiency?Ex. 4 Superheated water Vapor enters a Valve at 3 MPa . 320 c and exits at a pressure f o.5 MPa. The exp- ausion is a throttling process. Determine the speciffic Flow avaitabilityat the inlet & exit and the irevers- i bility per unit mass Eメ KJ floding, each in l). Let T.= 25°cr Po= atm.5. A steam engine develops 45 BHP with dry saturated steam at 1.03425 MPa and exhaust at 0.12411 MPa. Steam consumption is 750 kg/hr. Calculate the thermal efficiency of equivalent Rankine Engine, in percent. Show complete solution and THE INTERPOLATION SOLUTION
- 4.1 A gas turbine power plant is operating as follows. Compressor intake air temperature T, is 306 K, pressure p, is 100 kPa, and compressor pressure ratio B is 15. TIT T, is 1490 K. Isentropic efficiency of compressor N, is 0.88, and that of turbine n is 0.91. Air mass flow rate mi, is 636 kg/s. Fuel mass may be ignored. Calculate (i) actual temperatures at compressor and turbine exits, (ii) plant actual net specific work per kg air, (iii) plant actual power output, (iv) plant actual rates of heat addition and rejection, and (v) plant actual thermal efficiency.A turbine engine air intake is at pressure and temperature of air drawn 99 kPa and 29 °C respectively. The maximum pressure and temperature during the cycle is 990 kPa and 888 °C respectively. The adaibatic index as 1.4. After claculations, the pressure ratio of the cycle is compressor exit temperature is K, turbine exit temperature is K, net specific work output from the gas turbine engine is in k thermal efficiency_ is % and work ratio of the cycle is to I decimal place.You have a tank that is 0.01 m^3 and is initially evacuated. You then hook this up to a line that supplies N2 at a pressure of P_1 = 5 bar and a T_1 = 350 K. The tank fills adiabatically (you can assume there is no heat flow to the walls of the tank), and the filling ends when no more N2 flows into the tank. Find a) the final pressure of the gas in the tank, and b) the final temperature of the gas in the tank. You can assume N2 is an ideal gas with a CP* = 29 J/mol K. NOTE: Mainly I am confused on how the evacuated tank factors into the work for b). What I did was use the ideal gas formula to find a value for N2*T2 (601.395) but I am no longer certain how to continue in the work. I was assuming the practice question had meant the temperature of the tank was 0 initially but it leads to a negative mole value. For a) I got 5 bar, arguing the flow would stop when the pressure of tank and line are equal