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Consider a situation for which a chemical of density p = 1200 kg/m³ and specific heat c = 2200 J/kg• K occu- pies a volume of V = 2.25 m³ in an insulated vessel. The chemical is to be heated from room temperature, %3D T; = 300 K, to a process temperature of T = 450 K by passing saturated steam at T, = 500 K through a coiled, thin-walled, 20-mm-diameter tube in the vessel. Steam condensation within the tube maintains an interior con- vection coefficient of h; = 10,000 W/m² · K, while the highly agitated liquid in the stirred vessel maintains an outside convection coefficient of h, = 2000 W/m² .K.

Consider a situation for which a chemical of density p = 1200 kg/m³ and specific heat c = 2200 J/kg• K occu- pies a volume of V = 2.25 m³ in an insulated vessel. The chemical is to be heated from room temperature, %3D T; = 300 K, to a process temperature of T = 450 K by passing saturated steam at T, = 500 K through a coiled, thin-walled, 20-mm-diameter tube in the vessel. Steam condensation within the tube maintains an interior con- vection coefficient of h; = 10,000 W/m² · K, while the highly agitated liquid in the stirred vessel maintains an outside convection coefficient of h, = 2000 W/m² .K.

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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Batch processes are often used in chemical and pharma- ceutical operations to achieve a desired chemical composition for the final product and typically involve a transient heating operation to take the product from room temperature to the desired process temperature. Consider a situation for which a chemical of density p = 1200 kg/m³ and specific heat c = 2200 J/kg• K occu- pies a volume of V = 2.25 m³ in an insulated vessel. The chemical is to be heated from room temperature, T; = 300 K, to a process temperature of T = 450 K by passing saturated steam at T, = 500 K through a coiled, thin-walled, 20-mm-diameter tube in the vessel. Steam condensation within the tube maintains an interior con- vection coefficient of h, = 10,000 W/m2· K, while the highly agitated liquid in the stirred vessel maintains an outside convection coefficient of h, = 2000 W/m2 · K. Steam Tp m - Coiled tubing (D, L, h¡, h,) Stirred liquid TО, V, p, с - Containment vessel
Transcribed Image Text:Batch processes are often used in chemical and pharma- ceutical operations to achieve a desired chemical composition for the final product and typically involve a transient heating operation to take the product from room temperature to the desired process temperature. Consider a situation for which a chemical of density p = 1200 kg/m³ and specific heat c = 2200 J/kg• K occu- pies a volume of V = 2.25 m³ in an insulated vessel. The chemical is to be heated from room temperature, T; = 300 K, to a process temperature of T = 450 K by passing saturated steam at T, = 500 K through a coiled, thin-walled, 20-mm-diameter tube in the vessel. Steam condensation within the tube maintains an interior con- vection coefficient of h, = 10,000 W/m2· K, while the highly agitated liquid in the stirred vessel maintains an outside convection coefficient of h, = 2000 W/m2 · K. Steam Tp m - Coiled tubing (D, L, h¡, h,) Stirred liquid TО, V, p, с - Containment vessel
If the chemical is to be heated from 300 to 450 K in 60 min, what is the required length L of the submerged tubing?
Transcribed Image Text:If the chemical is to be heated from 300 to 450 K in 60 min, what is the required length L of the submerged tubing?
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