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A two effect system of evaporators with parallel forward feed flow of liquid and vapor is to be designed to concentrate continuously 10,000 lb/h of a 10% by weight solution to 40%, the feed being at 150 0F. It is planned to use saturated steam condensing at 220 0F. Specific Heat of feed liquor is 0.9, while that leaving the first effect is equal to the average specific heat of feed and product. The overall heat transfer coefficients are 300 and 400 BTU/(ft2-hr-0F) for the first and second effects respectively. The latent heat of vaporization for the vapor leaving the first effect is 1002.3 BTU/lb and 1020 BTU/lb for the second. Calculate for the steam economy and the heat transfer area in each effect

A two effect system of evaporators with parallel forward feed flow of liquid and vapor is to be designed to concentrate continuously 10,000 lb/h of a 10% by weight solution to 40%, the feed being at 150 0F. It is planned to use saturated steam condensing at 220 0F. Specific Heat of feed liquor is 0.9, while that leaving the first effect is equal to the average specific heat of feed and product. The overall heat transfer coefficients are 300 and 400 BTU/(ft2-hr-0F) for the first and second effects respectively. The latent heat of vaporization for the vapor leaving the first effect is 1002.3 BTU/lb and 1020 BTU/lb for the second. Calculate for the steam economy and the heat transfer area in each effect

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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A two effect system of evaporators with parallel forward feed flow of liquid and vapor is to be designed to concentrate continuously 10,000 lb/h of a 10% by weight solution to 40%, the feed being at 150 0F. It is planned to use saturated steam condensing at 220 0F. Specific Heat of feed liquor is 0.9, while that leaving the first effect is equal to the average specific heat of feed and product. The overall heat transfer coefficients are 300 and 400 BTU/(ft2-hr-0F) for the first and second effects respectively. The latent heat of vaporization for the vapor leaving the first effect is 1002.3 BTU/lb and 1020 BTU/lb for the second. Calculate for the steam economy and the heat transfer area in each effect
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