In a dairy operation, milk at a flow rate of 250 liter/hour and a temperature of 38.6°C must be chilled to a safe-to-store temperature of 13°C or less. Cooling water at 10°C is available at a flow rate of 0.72 m^3/h. The density and specific heat of milk are 1030 kg/m^3 and 3860 J/kg K, respectively.Determine the UA product of a counterflow heat exchanger required for the chilling process. Determine the length of the exchanger if the inner pipe has a 50 mm diameter and the overall heat transfer coefficient is U = 1000 W/m^2 K.Determine the outlet temperature of the water. Using the value of UA found in part (1), determine the milk outlet temperature if the water flow rate is doubled. What is the outlet temperature if the flow rate is halved?

Flow rate of milk, Vmilk = 250 L/hTemperature of cow body, Tcow = 38.6ºC = 311.75 KSafe storage…

Answered: In a dairy operation, milk at a flow…

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

See similar textbooks

Related questions

Question

In a dairy operation, milk at a flow rate of 250 liter/hour and a temperature of 38.6°C must be chilled to a safe-to-store temperature of 13°C or less. Cooling water at 10°C is available at a flow rate of 0.72 m^3/h. The density and specific heat of milk are 1030 kg/m^3 and 3860 J/kg K, respectively.

Determine the UA product of a counterflow heat exchanger required for the chilling process. Determine the length of the exchanger if the inner pipe has a 50 mm diameter and the overall heat transfer coefficient is U = 1000 W/m^2 K.
Determine the outlet temperature of the water.
Using the value of UA found in part (1), determine the milk outlet temperature if the water flow rate is doubled. What is the outlet temperature if the flow rate is halved?

Expert Solution