Crude oil, cp = 1.9 kJ/(kg.K), flows at a rate of 0.32 kg/s through the inner pipe of a tube-in-tube heat exchanger and it is heated from 29 °C to 96 °C. Another hydrocarbon, cp = 2.50 kJ/(kg.K), enters at 240 °C. The overall coefficient of heat transfer is found to be 4200 W/(m².K). Determine for a minimum temperature difference of 20 °C between the hot and cold fluids: a) the LMTD for parallel flow and for counterflow heat exchanger; b) the surface area for both heat exchanger configurations; c) mass flow rate of hot fluid for both heat exchanger configurations.
Crude oil, cp = 1.9 kJ/(kg.K), flows at a rate of 0.32 kg/s through the inner pipe of a tube-in-tube heat exchanger and it is heated from 29 °C to 96 °C. Another hydrocarbon, cp = 2.50 kJ/(kg.K), enters at 240 °C. The overall coefficient of heat transfer is found to be 4200 W/(m².K). Determine for a minimum temperature difference of 20 °C between the hot and cold fluids: a) the LMTD for parallel flow and for counterflow heat exchanger; b) the surface area for both heat exchanger configurations; c) mass flow rate of hot fluid for both heat exchanger configurations.
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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Transcribed Image Text:Crude oil, cp = 1.9 kJ/(kg.K), flows at a rate of 0.32 kg/s through the inner pipe of a tube-in-tube
heat exchanger and it is heated from 29 °C to 96 °C. Another hydrocarbon, cp = 2.50 kJ/(kg.K),
enters at 240 °C. The overall coefficient of heat transfer is found to be 4200 W/(m².K). Determine
for a minimum temperature difference of 20 °C between the hot and cold fluids: a) the LMTD
for parallel flow and for counterflow heat exchanger; b) the surface area for both heat
exchanger configurations; c) mass flow rate of hot fluid for both heat exchanger configurations.
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