Steam passes steadliy through a turbine and condenser as shown in the figure below. After expanding through the turbine and producing 1000kW of power, the steam is at a pressure of 0.08 bar and a quality of 87.4%; it enters a shell-and-tube heat exchanger where the steam now condenses on the outside of tubes through which cooling water flows; this condensate continues to flow, finally exiting as saturated liquid at 0.08 bar. The mass flow rate of the condensing steam is 58kg/s. In order to condense the steam, cooling water enters the tubes at 15°C and flows as a separate stream to exit at 35°C with negligible change in pressure. Stray heat transfer is negligible as are kinetic and potential effects. Considering the steam inside the turbine as a system, is the system best described as open, closed or isolated? What is the mass flow rate of steam entering the turbine in kg/s? What is the enthalpy at the inlet of the turbine in k/kg?

Steam passes steadliy through a turbine and condenser as shown in the figure below. After expanding through the turbine and producing 1000kW of power, the steam is at a pressure of 0.08 bar and a quality of 87.4%; it enters a shell-and-tube heat exchanger where the steam now condenses on the outside of tubes through which cooling water flows; this condensate continues to flow, finally exiting as saturated liquid at 0.08 bar. The mass flow rate of the condensing steam is 58kg/s. In order to condense the steam, cooling water enters the tubes at 15°C and flows as a separate stream to exit at 35°C with negligible change in pressure. Stray heat transfer is negligible as are kinetic and potential effects. Considering the steam inside the turbine as a system, is the system best described as open, closed or isolated? What is the mass flow rate of steam entering the turbine in kg/s? What is the enthalpy at the inlet of the turbine in k/kg?

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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Concept explainers

Heat Exchangers

Heat exchangers are the types of equipment that are primarily employed to transfer the thermal energy from one fluid to another, provided that one of the fluids should be at a higher thermal energy content than the other fluid.

Heat Exchanger

The heat exchanger is a combination of two words ''Heat'' and ''Exchanger''. It is a mechanical device that is used to exchange heat energy between two fluids.

Question

O steam
W out
Turbine
4 CW in
Surface condenser
CW out O
Condensate
W in
Hotwell pump

Steam passes steadliy through a turbine and condenser as shown in the figure below.
After expanding through the turbine and producing 1000kW of power, the steam is at a pressure of 0.08 bar and a quality of
87.4%; it enters a shell-and-tube heat exchanger where the steam now condenses on the outside of tubes through which cooling
water flows; this condensate continues to flow, finally exiting as saturated liquid at 0.08 bar. The mass flow rate of the
condensing steam is 58kg/s, In order to condense the steam, cooling water enters the tubes at 15°C and flows as a separate
stream to exit at 35°C with negligible change in pressure.
Stray heat transfer is negligible as are kinetic and potential effects.
Considering the steam inside the turbine as a system, is the system best described as open, closed or isolated?
What is the mass flow rate of steam entering the turbine in kg/s?
What is the enthalpy at the inlet of the turbine in k/kg?
What is the mass flowrate of the cooling water in kg/s?
If the diameter of the cooling water line is 10cm, what is the velocity of the cooling water in m/s when it enters the condenser?
A 100kW pump is available to transfer the condensate to a storage tank (i.e, the magnitude of Wdot in is 100kW). What would
be the maximum increase in height in meters that the pump could move the water assuming that the temperature, pressure, and
velocity of the condensate are roughly equal at the inlet and outlet of the pump section?

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