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PROBLEM: Double Effect Evaporator A two effect system of evaporators with parallel forward feed flow of liquid and vapor is to be designed to concentrate continuously 10,000 Ib/h of a 10% by weight solution to 40%, the feed being at 150 °F. It is planned to use saturated steam condensing at 220 °F. 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-oF) for the first and second effects respectively. The latent heat of vaporization for the vapor leaving the first effect is 1002.3 BTU/b and 1020 BTU/lb for the second. Calculate for the steam economy and the heat transfer area in each effect. Given: (1) Required: . and

PROBLEM: Double Effect Evaporator A two effect system of evaporators with parallel forward feed flow of liquid and vapor is to be designed to concentrate continuously 10,000 Ib/h of a 10% by weight solution to 40%, the feed being at 150 °F. It is planned to use saturated steam condensing at 220 °F. 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-oF) for the first and second effects respectively. The latent heat of vaporization for the vapor leaving the first effect is 1002.3 BTU/b and 1020 BTU/lb for the second. Calculate for the steam economy and the heat transfer area in each effect. Given: (1) Required: . and

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Calculate also the material balance, enthalpy balance, data for enthalpies and latent heats of condensation and area
PROBLEM: Double Effect Evaporator A two effect system of evaporators with parallel forward feed flow of liquid and vapor is to be designed to concentrate continuously 10,000 Ib/h of a 10% by weight solution to 40%, the feed being at 150 °F. It is planned to use saturated steam condensing at 220 °F. 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-°F) 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. Given: Required: and
Transcribed Image Text:PROBLEM: Double Effect Evaporator A two effect system of evaporators with parallel forward feed flow of liquid and vapor is to be designed to concentrate continuously 10,000 Ib/h of a 10% by weight solution to 40%, the feed being at 150 °F. It is planned to use saturated steam condensing at 220 °F. 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-°F) 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. Given: Required: and
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