1- The thermodynamic device, which uses water as the working fluid and the basic information is given below, has a heat supply of 70 MW and a thermal efficiency of 38%. Coal with a heating value of 17500 kj/kg is burned to provide heat to the system. According to this, determine; a) Net work output of the device b) mass flow rate of the working fluid c) the average linear speed at the turbine inlet d) Required amount of coal rate e) Amount of excess(unused) heat discharge. f) If the excess heat from the system is equivalent to the energy to be used to heat the carbon dioxide gas at 20 degree Celsius and 100kPa to 134 degree Celsius and 100 kPa, calculate the amount of carbon dioxide gas that can be heated in this process and the tank volume required to store this gas. High-temperature reservoir at Tu HE Coal heating value= 17500 kj/kg lt. Watot Low-temperature reservoir at T₁ Tturbine,inlet=600 °C PTurbine,inlet = 2 MPa DTurbine,inlet = 7 cm Tturbine,outlet 99.63 °C PTurbine,outlet = 0.1 MPa XTurbine,outlet 0.8

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
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1- The thermodynamic device, which uses water as the working fluid and the basic information
is given below, has a heat supply of 70 MW and a thermal efficiency of 38%. Coal with a
heating value of 17500 kj/kg is burned to provide heat to the system. According to this,
determine;
a) Net work output of the device
b) mass flow rate of the working fluid
c) the average linear speed at the turbine inlet
d) Required amount of coal rate
e) Amount of excess(unused) heat discharge.
f) If the excess heat from the system is equivalent to the energy to be used to heat the carbon
dioxide gas at 20 degree Celsius and 100kPa to 134 degree Celsius and 100 kPa, calculate the
amount of carbon dioxide gas that can be heated in this process and the tank volume required
to store this gas.
High-temperature reservoir
at Tu
HE
Он
Coal heating
value=
17500 kj/kg
1
Wo
Low-temperature reservoir
at T₁
Tturbine,inlet=600 °C
PTurbine, inlet = 2 MPa
DTurbine,inlet = 7 cm
Tturbine,outlet 99.63 °C
PTurbine,outlet = 0.1 MPa
XTurbine,outlet = 0.8
Transcribed Image Text:1- The thermodynamic device, which uses water as the working fluid and the basic information is given below, has a heat supply of 70 MW and a thermal efficiency of 38%. Coal with a heating value of 17500 kj/kg is burned to provide heat to the system. According to this, determine; a) Net work output of the device b) mass flow rate of the working fluid c) the average linear speed at the turbine inlet d) Required amount of coal rate e) Amount of excess(unused) heat discharge. f) If the excess heat from the system is equivalent to the energy to be used to heat the carbon dioxide gas at 20 degree Celsius and 100kPa to 134 degree Celsius and 100 kPa, calculate the amount of carbon dioxide gas that can be heated in this process and the tank volume required to store this gas. High-temperature reservoir at Tu HE Он Coal heating value= 17500 kj/kg 1 Wo Low-temperature reservoir at T₁ Tturbine,inlet=600 °C PTurbine, inlet = 2 MPa DTurbine,inlet = 7 cm Tturbine,outlet 99.63 °C PTurbine,outlet = 0.1 MPa XTurbine,outlet = 0.8
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