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I just got confused by this table isn't the enthalpy supposed to go lower in (highlighted)value how did he put it 130 then 400 ? Is there trick behind it. Please answer this query

I just got confused by this table isn't the enthalpy supposed to go lower in (highlighted)value how did he put it 130 then 400 ? Is there trick behind it. Please answer this query

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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I just got confused by this table isn't the enthalpy supposed to go lower in (highlighted)value how did he put it 130 then 400 ? Is there trick behind it. Please answer this query
Q1. A plant has two process hot streams (H₁ and H2), two process cold streams (C1 and C2), a heating utility (HU₁), and a cooling utility (CU₁). The problem data are given in Table 1. A value of ATmin=10°F is used. Using graphical and algebraic techniques, determine the minimum heating and cooling requirements for the problem. TABLE 1. STREAM DATA FOR PROBLEM 1 Target Enthalpy change temperature (°F) temperature (°F) (10³ Btu/h) Stream Flowratex specific Supply heat (Btu/h °F) H₁ 1000 250 120 130 H₂ 4000 200 100 400 HU₁ ? 280 250 3000 90 150 -180 C₂ 6000 130 190 -360 CU₁ ? 60 80 ?
Transcribed Image Text:Q1. A plant has two process hot streams (H₁ and H2), two process cold streams (C1 and C2), a heating utility (HU₁), and a cooling utility (CU₁). The problem data are given in Table 1. A value of ATmin=10°F is used. Using graphical and algebraic techniques, determine the minimum heating and cooling requirements for the problem. TABLE 1. STREAM DATA FOR PROBLEM 1 Target Enthalpy change temperature (°F) temperature (°F) (10³ Btu/h) Stream Flowratex specific Supply heat (Btu/h °F) H₁ 1000 250 120 130 H₂ 4000 200 100 400 HU₁ ? 280 250 3000 90 150 -180 C₂ 6000 130 190 -360 CU₁ ? 60 80 ?
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