1- First law transient: A water storage tank initially contains 400 m³ of water. The average daily usage is40 m³. If water is added to the tank at an average rate of 20[exp(-t/20)] m³ per day, where t is time indays, for how many days will the tank contain water?2- First law steady state: A simple vapor powerplant operating at steady state with watercirculating through the components is shown. ThePi= 100 barT; = 520°CPower outTurbinemass flow rate of the water is 109 kg/s. Kineticand potential energy effects are negligible as areall stray heat transfers. Determine (a) the thermalefficiency, (b) the mass flow rate of the coolingwater passing through the condenser, in kg/s.P=0.08 barSteamX2= 90%+2Coolingwater in at 20°CgeneratorCondenser4 P= 100 barT = 43°CCoolingwater out at 35°CPumpP=0.08 barSaturated liquidPowerin3- First law steady state: Steam enters a well-insulated turbine operating at steady state with negligiblevelocity at 4 MPa, 320°C. The steam expands to an exit pressure of 0.07 MPa and a velocity of 90 m/s.The diameter of the exit is 0.6 m. Neglecting potential energy effects, plot the power developed by theturbine, in kW, versus the steam quality at the turbine exit ranging from 0.9 to 1.0.4- Second law steady state: Steam at 5 MPa and 600°C enters an insulated turbine operating at steadystate and exits as saturated vapor at 50 kPa. Kinetic and potential energy effects are negligible.Determine (a) the work developed by the turbine, in kJ per kg of steam flowing through the turbine. (b)the isentropic turbine efficiency.5- Second law steady state: An electrically-driven pump operating at steady state draws water from apond at a pressure of 1 bar and a rate of 40 kg/s and delivers the water at a pressure of 4 bar. There isno significant heat transfer with the surroundings, and changes in kinetic and potential energy can beneglected. The isentropic pump efficiency is 80%. Evaluating electricity at 8 cents/kWh estimate thehourly cost of running the pump.

1- First law transient: A water storage tank initially contains 400 m of water. The average daily usage is 40 m. If water is added to the tank at an average rate of 20[exp(-t/20)] m³ per day, where t is time in days, for how many days will the tank contain water? 2- First law steady state: A simple vapor power

1- First law transient: A water storage tank initially contains 400 m of water. The average daily usage is 40 m. If water is added to the tank at an average rate of 20[exp(-t/20)] m³ per day, where t is time in days, for how many days will the tank contain water? 2- First law steady state: A simple vapor power

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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