2] An adiabatic feed pump in a steam cycle delivers water to the steam generator at atemperature of 200 ocand a pressure of 10 MPaa. The water enters the pump as saturated liquid at 180 °C. 1fthe mass flow rate of water is 20 kg/s, determine a) the discharge volume flo rate of thepump; and b) the pump power input. c) What is the percentage error if the exit conditionsare assumed to be a saturated liquid ant 200 C.

(a) Write the formula for discharge of the pump. V˙=m˙ρ Here, V˙ is the discharge of the pump, m˙ is…

Answered: 2] An adiabatic feed pump in a steam…

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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There are two turbine stages with a reheater in between, as shown below and the following conditions are provided. Assume the mass flow rate of air = 1 Kg/s. Turbine stage 1 Stream 1 2 3 4 Reheat combustor P (kPa) T (K) 1200 350 350 100 1200 1200 3 Turbine stage 2 h (kJ/kg) W cycle • Determine the total work developed, which is the sum of the work developed by the first stage and the work developed in the second stage. • Determine the heat added in the reheater. • If the reheat is turned off, streams 2 and 3 no longer exist and we go directly from 1 to a new state at stream 4. What is h4 and what is the work generated in the turbine in this case?
The turbine and compressor are adiabatic. Determine for this cycle, whether it is Perpetual Motion Machine and its kind? a) No b) Yes, PMM 2 c) Yes, PMM 1
6. The following image shows Carnot cycle beginning from the point A and returns back to A. a) Using adiabatic expansion and isothermal expansion, prove that this cycle (1-4) has no net change in entropy. (dS = 0) b) Prove that the efficiency of any machine is only dependent on the temperature difference of hot source and cold sink. work performed 71- heat absorbed fro hot source c) In an ideal heat engine, the cold sink is at 5 °C. If 250.0 kJ of heat is withdrawn from the hot source and 200.0 kJ of work is generated, what is the initial temperature of the hot source? Pressure p D Adiabat 1 Isotherm Adiabat Isotherm 3 Volume, V B
1. A two-stage regenerative steam power plant produces 37 MW. The steam leaving the boiler is at 6.0 MPa and 500°C. The turbine has a design back pressure of 5 kPa. The extraction points are 1.4 MPa and 150 kPa for feedwater heating using open heaters. Determine a) The cycle efficiency b) The steam flow rate at the turbine inlet c) The fractions of the steam extracted for feedwater heating d) The quality of steam at turbine exit
The air entering a compressor with a pressure ratio of 10 at 100kPa at 27°C leaves at 600K. It enters the turbine at a temperature of 1300 K and exits at a temperature of 800 K. Since the power of the gas turbine is 10 MW, a) Draw the T-s diagram of the cycle b) Find the amount of fluid circulating in the installation. c) Find the adiabatic efficiencies of the gas turbine and the compressor. d) Find net work Note. Assume that the specific heat of heating of the air is constant. cp=1 kj/kgC cv=07181 kj/kgC
Q 4) A simple vapour compression plant produces (5 tonnes) of refrigeration. The enthalpy values at inlet to compressor, at exit from the compressor, and at exit from the condenser are (183.19, 209.41 and 74.59 kJ/kg) respectively. Determine :- (i) The refrigerant flow rate, (ii) The C.O.P. (ii) The power required to drive the compressor. (iv) The rate of heat rejection to the condenser.
7.) A Rankine cycle is used for a steam power plant. Liquid first enters the turbine at 2.25 MPa and 300C then exits at 0.025 MPa. The pump receives saturated liquid from the condenser before sending it to the boiler at the original pressure. a.) Draw the T-S diagram. b.) Find the dryness at turbine exit, c.) Wp, d.) Qa, e.) Qr, f.) Wt, g.) Wnet (kJ/kg), h.) Efficiency (%), and i.) Steam rate (kg/KVWH) 100%, 3.12 kJ/kg, 3016.3 kJ/kg, 2346.3 kJ/kg, 522.3 kJ/kg, 35.22%, 4.63 kg/kWh • 95.21%, 2.27 kJ/kg, 2809.6 kJ/kg, 1875.21 kJ/kg, 815.33 kJ/kg, 31.29%, 3.51 kg/kWh 83.73%, 2.27 kJ/kg, 2742.1 kJ/kg, 1964.48 kJ/kg, 779.89 kJ/kg, 28.36%, 4.63 kg/kWh 100%, 0 kJ/kg, 3016.3 kJ/kg, 271.93 kJ/kg, 2798 kJ/kg, 100%, 1 kg/kWh
A regenerating brayton cycle that uses air as the fluid has a pressure ratio of 7. The minimum and maximum temperatures in the cycle are 30 ° C and 890 ° C. assuming an efficiency of 72% for the compressor, 82% for the turbine and an effectiveness of 62% for the regenerator. determine: a) the turbine air outlet temperature b) net labor output c) the thermal efficiency of the cycle
A heat exchanger uses medium pressure steam at 10 bar and 350 C to heat cyclohexane vapor from 100 C up to 275 C as shown in the figure below. The steam is available at a flowrate of 32 kg/h and it condenses completely in the heat exchanger and exits as saturated liquid condensate at 10 bar. a) How much heat (in kW) can be provided by the steam? b) How much cyclohexane can be processed in kg/h? Vapor Cyclohexane T = 100 C P = 1 atm Steam T = 350 C = 10 bar Condensate P Vapor Cyclohexane T = 275 C P = 1 atm P = 10 bar
The last 3 parts B,D,E

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