5.4a An engineer claims to have developed a heat engine that received 800 kJ of heat from a source at 300°C and produces 300 kJ of net work while rejecting the waste heat to a sink at 27°C. Are these measurements reasonable? Explain. 5.4b An inventor claims that he has designed a heat engine that operates in a cycle receiving heat at the rate of 120 kW from a waste heat source at 320°C. The engine delivers work at the rate of 65 kW and rejects heat to the atmosphere at 30°C. Is the claim of the inventor valid?

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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5.4a An engineer claims to have developed a heat engine that received 800 kJ of heat from a
source at 300°C and produces 300 kJ of net work while rejecting the waste heat to a sink at
27°C. Are these measurements reasonable? Explain.
5.4b An inventor claims that he has designed a heat engine that operates in a cycle receiving
heat at the rate of 120 kW from a waste heat source at 320°C. The engine delivers work at the
rate of 65 kW and rejects heat to the atmosphere at 30°C. Is the claim of the inventor valid?
142
Transcribed Image Text:5.4a An engineer claims to have developed a heat engine that received 800 kJ of heat from a source at 300°C and produces 300 kJ of net work while rejecting the waste heat to a sink at 27°C. Are these measurements reasonable? Explain. 5.4b An inventor claims that he has designed a heat engine that operates in a cycle receiving heat at the rate of 120 kW from a waste heat source at 320°C. The engine delivers work at the rate of 65 kW and rejects heat to the atmosphere at 30°C. Is the claim of the inventor valid? 142
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