Identify the working substance, specify the kind of system and sketch the system boundary Example: Nitrogen, at a pressure of 200 kPa and a temperature of 25C, flows at a velocity of 20 m/s through a pipe with a diameter of 35-mm. Working Substance: Nitrogen System: Open Nitrogen 1. Oxygen is compressed in a piston-cylinder arrangement Working Substance: System: Drawing: 2. An adiabatic condenser receives 100 kg/s of steam at 92% quality and 60 kPa. The steam leaves at 60 kPa and 600C. The cooling water enters at atmospheric pressure and 400C and discharges at 600C. Working Substance: System: Drawing 3. Two streams of air are mixed in a steady-flow mixing chamber that has two inlets and a single exit Working Substance: System: Drawing

Identify the working substance, specify the kind of system and sketch the system boundary Example: Nitrogen, at a pressure of 200 kPa and a temperature of 25C, flows at a velocity of 20 m/s through a pipe with a diameter of 35-mm. Working Substance: Nitrogen System: Open Nitrogen 1. Oxygen is compressed in a piston-cylinder arrangement Working Substance: System: Drawing: 2. An adiabatic condenser receives 100 kg/s of steam at 92% quality and 60 kPa. The steam leaves at 60 kPa and 600C. The cooling water enters at atmospheric pressure and 400C and discharges at 600C. Working Substance: System: Drawing 3. Two streams of air are mixed in a steady-flow mixing chamber that has two inlets and a single exit Working Substance: System: Drawing

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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Please show system sketches and related energy flows for all problems. 1.1 Determine the electrical power supplied to a boiler when the temperature of the entering water is 20 C and the exiting temperature is 89 C. The flow of the pressured water is 2 Kg/s. There is a negligible pressure drop through this boiler and it operates at a constant pressure of 3 bars. The specific heat is c = 4,370 J/(Kg K). There is a 1.5(105 ) W rate of heat loss from the boiler during this process to a surrounding at 293.2 k. Consider steady state conditions. 1.4 Calculate the mass flowrate of fuel (natural gas, CH4) required to heat the water flow to the conditions of problem 1.1 if the electrical heating device is replaced with a gas fired boiler. The high heating value (HHV) of the fuel is 50.02 MJ/kg. 1.5 Calculate the exergy destroyed in the process described by problem 1.4. The exergy of the fuel entering this process is 51.82 MJ/Kg. The dead state temperature is 293.2 K and pressure is 1 bar. The…
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