Oil is heated from 38 to 93°C by flowing inside the 1-in, 16 BWG tubes of a heat exchanger. Steam condenses outside the tubes at 100°C. The flow rate of oil is 1.26 kg/s and the inside area of the heat exchanger tubes is 18.60 m2 ; the specific heat of the oil is 3140 j/kg K. a) What is the overall heat transfer coefficient based on the inside area? b) If the steam-side coefficient is 2990 W/m2 K, what is the oil-side coefficient? Neglect the resistance of the tube wall. c) In order to increase the heat capacity, the steam pressure is increased so that it condenses at 149°C. What flow rate of oil is now obtained if the oil is still heated from 38 to 93°C? Assume that the steam–side coefficient remains 2990 W/m2K and that the properties of the oil are not changed by the new steam-side temperature.
Oil is heated from 38 to 93°C by flowing inside the 1-in, 16 BWG tubes of a heat exchanger. Steam condenses outside the tubes at 100°C. The flow rate of oil is 1.26 kg/s and the inside area of the heat exchanger tubes is 18.60 m2 ; the specific heat of the oil is 3140 j/kg K. a) What is the overall heat transfer coefficient based on the inside area? b) If the steam-side coefficient is 2990 W/m2 K, what is the oil-side coefficient? Neglect the resistance of the tube wall. c) In order to increase the heat capacity, the steam pressure is increased so that it condenses at 149°C. What flow rate of oil is now obtained if the oil is still heated from 38 to 93°C? Assume that the steam–side coefficient remains 2990 W/m2K and that the properties of the oil are not changed by the new steam-side temperature.
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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Question
Oil is heated from 38 to 93°C by flowing inside the 1-in, 16 BWG tubes of
a heat exchanger. Steam condenses outside the tubes at 100°C. The flow
rate of oil is 1.26 kg/s and the inside area of the heat exchanger tubes is
18.60 m2
; the specific heat of the oil is 3140 j/kg K.
a) What is the overall heat transfer coefficient based on the inside area?
b) If the steam-side coefficient is 2990 W/m2 K, what is the oil-side
coefficient? Neglect the resistance of the tube wall.
c) In order to increase the heat capacity, the steam pressure is increased
so that it condenses at 149°C. What flow rate of oil is now obtained if the
oil is still heated from 38 to 93°C?
Assume that the steam–side coefficient remains 2990 W/m2K and that the
properties of the oil are not changed by the new steam-side temperature.
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