Air at a temperature of 20°C (Cp = 1.005 kJ/kg°C) passes through a heat exchanger at a velocity of 40 m/s where its temperature is raised to 820°C. It then enters a turbine with same velocity of 40 m/s and expands till the temperature falls to 620°C. On leaving the turbine, the air is taken at a velocity of 55 m/s to a nozzle where it expands until the temperature has fallen to 510°C. If the air flow rate is 2.5 kg/s, calculate:- i. ii. Rate of heat transfer to the air in the heat exchanger;- The power output from the turbine assuming no heat loss; The velocity at exit from the nozzle, assuming no heat loss.
Air at a temperature of 20°C (Cp = 1.005 kJ/kg°C) passes through a heat exchanger at a velocity of 40 m/s where its temperature is raised to 820°C. It then enters a turbine with same velocity of 40 m/s and expands till the temperature falls to 620°C. On leaving the turbine, the air is taken at a velocity of 55 m/s to a nozzle where it expands until the temperature has fallen to 510°C. If the air flow rate is 2.5 kg/s, calculate:- i. ii. Rate of heat transfer to the air in the heat exchanger;- The power output from the turbine assuming no heat loss; The velocity at exit from the nozzle, assuming no heat loss.
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:Air at a temperature of 20°C (Cp = 1.005 kJ/kg°C) passes through a heat exchanger at
a velocity of 40 m/s where its temperature is raised to 820°C. It then enters a turbine
with same velocity of 40 m/s and expands till the temperature falls to 620°C. On
leaving the turbine, the air is taken at a velocity of 55 m/s to a nozzle where it
expands until the temperature has fallen to 510°C. If the air flow rate is 2.5 kg/s,
calculate: -
i.
ii.
Rate of heat transfer to the air in the heat exchanger;-
The power output from the turbine assuming no heat loss;
The velocity at exit from the nozzle, assuming no heat loss.
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