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Keeping all the specifics constant, determine the area required for a regenerator to have an effectiveness of 0.8. Use the NTU method and then verify your answer by the LMTD method.

Keeping all the specifics constant, determine the area required for a regenerator to have an effectiveness of 0.8. Use the NTU method and then verify your answer by the LMTD method.

Introduction to Chemical Engineering Thermodynamics
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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Keeping all the specifics constant, determine the area required for a regenerator to have an effectiveness of 0.8. Use the NTU method and then verify your answer by the LMTD method.

The mass and specific heat of both stream 1 and stream are the same, so Cmin would equal Cmax. I determined the area using the NTU method, but how would we determine t1,e and t2,e using the log-mean temperature difference (LMTD) method in order to verify the area? 

A counter-flow regenerator is used in a gas turbine power plant to preheat the air before it enters the combustor. Specifics are as shown in the figure below. つ。Osを=?7 regenen tar -tze=? combustor ひ=7s W tie=? 6= 1.05 K5 Kg K ti = = 700°.
Transcribed Image Text:A counter-flow regenerator is used in a gas turbine power plant to preheat the air before it enters the combustor. Specifics are as shown in the figure below. つ。Osを=?7 regenen tar -tze=? combustor ひ=7s W tie=? 6= 1.05 K5 Kg K ti = = 700°.
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