You, a process design engineer, are tasked to build a powerplant that utilizes 1.5 metric tons of municipal solid wastes (MSW) per hour. In an industrial boiler, MSW is burned to heat and pressurize 1 kg/s of preheated water to high-pressure steam (44 atm, 450 °C). The high-pressure steam, moving at a linear velocity of 70 m/s, is then used to drive a high-pressure turbine. In a heat exchanger, the used steam from the outlet of high-P turbine at an intermediate pressure (10 atm, 250 °C) is used to preheat the water that will be fed to the boiler. This water is pumped from an underground reservoir at a low velocity (1 atm, 25 °C). After preheating the water, the intermediate-pressure steam leaving the heat exchanger is then used to drive a low-pressure turbine. Lastly, the steam from outlet of the low-P turbine leaves at a velocity of 10 m/s (at 1 atm and 100 °C) via an exhaust 10 m above the pump inlet. The industrial boiler is insulated, but due to the high temperatures and the nature of the process, there are inevitably heat losses. As such, 25% of the heat from the burning of MSW is lost from the boiler.
You, a process design engineer, are tasked to build a powerplant that utilizes 1.5 metric tons of municipal solid wastes (MSW) per hour. In an industrial boiler, MSW is burned to heat and pressurize 1 kg/s of preheated water to high-pressure steam (44 atm, 450 °C). The high-pressure steam, moving at a linear velocity of 70 m/s, is then used to drive a high-pressure turbine. In a heat exchanger, the used steam from the outlet of high-P turbine at an intermediate pressure (10 atm, 250 °C) is used to preheat the water that will be fed to the boiler. This water is pumped from an underground reservoir at a low velocity (1 atm, 25 °C). After preheating the water, the intermediate-pressure steam leaving the heat exchanger is then used to drive a low-pressure turbine. Lastly, the steam from outlet of the low-P turbine leaves at a velocity of 10 m/s (at 1 atm and 100 °C) via an exhaust 10 m above the pump inlet. The industrial boiler is insulated, but due to the high temperatures and the nature of the process, there are inevitably heat losses. As such, 25% of the heat from the burning of MSW is lost from the boiler.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:You, a process design engineer, are tasked to build a powerplant that utilizes 1.5 metric tons of municipal
solid wastes (MSW) per hour. In an industrial boiler, MSW is burned to heat and pressurize 1 kg/s of
preheated water to high-pressure steam (44 atm, 450 °C).
The high-pressure steam, moving at a linear velocity of 70 m/s, is then used to drive a high-pressure
turbine. In a heat exchanger, the used steam from the outlet of high-P turbine at an intermediate pressure
(10 atm, 250 °C) is used to preheat the water that will be fed to the boiler. This water is pumped from an
underground reservoir at a low velocity (1 atm, 25 °C).
After preheating the water, the intermediate-pressure steam leaving the heat exchanger is then used to
drive a low-pressure turbine. Lastly, the steam from outlet of the low-P turbine leaves at a velocity of 10
m/s (at 1 atm and 100 °C) via an exhaust 10 m above the pump inlet.
The industrial boiler is insulated, but due to the high temperatures and the nature of the process, there are
inevitably heat losses. As such, 25% of the heat from the burning of MSW is lost from the boiler.
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