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Number of cooling crystallizer units. Two ton/h of the dodecahydrate of sodium phosphate (Na3PO4 · 12H2O) is to be crystallized by cooling, in a cooling crystallizer, an aqueous solution that enters saturated at 40°C and leaves at 20°C. Chilled cooling water flows counter- currently, entering at 10°C and exiting at 25°C. The overall heat-transfer coefficient is 20 Btu/h-ft²-°F. Solution average specific heat is 0.80 cal/g-°C. Estimate the: (a) tons (2,000 lb) per hour of feed solution; (b) heat-transfer area in ft“; (c) number of crystallizer units required if each 10-ft-long unit contains 30 ft² 17.23. of heat-transfer surface.

Number of cooling crystallizer units. Two ton/h of the dodecahydrate of sodium phosphate (Na3PO4 · 12H2O) is to be crystallized by cooling, in a cooling crystallizer, an aqueous solution that enters saturated at 40°C and leaves at 20°C. Chilled cooling water flows counter- currently, entering at 10°C and exiting at 25°C. The overall heat-transfer coefficient is 20 Btu/h-ft²-°F. Solution average specific heat is 0.80 cal/g-°C. Estimate the: (a) tons (2,000 lb) per hour of feed solution; (b) heat-transfer area in ft“; (c) number of crystallizer units required if each 10-ft-long unit contains 30 ft² 17.23. of heat-transfer surface.

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
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Number of cooling crystallizer units. Two ton/h of the dodecahydrate of sodium phosphate (Na3PO4 · 12H2O) is to be crystallized by cooling, in a cooling crystallizer, an aqueous solution that enters saturated at 40°C and leaves at 20°C. Chilled cooling water flows counter- currently, entering at 10°C and exiting at 25°C. The overall heat-transfer coefficient is 20 Btu/h-ft²-°F. Solution average specific heat is 0.80 cal/g-°C. Estimate the: (a) tons (2,000 lb) per hour of feed solution; (b) heat-transfer area in ft“; (c) number of crystallizer units required if each 10-ft-long unit contains 30 ft² 17.23. of heat-transfer surface.
Transcribed Image Text:Number of cooling crystallizer units. Two ton/h of the dodecahydrate of sodium phosphate (Na3PO4 · 12H2O) is to be crystallized by cooling, in a cooling crystallizer, an aqueous solution that enters saturated at 40°C and leaves at 20°C. Chilled cooling water flows counter- currently, entering at 10°C and exiting at 25°C. The overall heat-transfer coefficient is 20 Btu/h-ft²-°F. Solution average specific heat is 0.80 cal/g-°C. Estimate the: (a) tons (2,000 lb) per hour of feed solution; (b) heat-transfer area in ft“; (c) number of crystallizer units required if each 10-ft-long unit contains 30 ft² 17.23. of heat-transfer surface.
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