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An oil is being cooled in certain equipment. It was observed that a 7.94 bmin of hot oil enters a negligible diameter thickness metal pipe of D= 25 mm. At the same time same mass of cooling water flows through the annular space between the pipe and a larger concentric pipe; the oil and water moving in opposite directions. The oil enters at 420 K and is to be cooled to 320 K. If the water enters at 290 K, what length of pipe will be required? Take coefficients of 1.6 kWim? K on the oil side and 3.6 KWim? K on the water side and 2.0 kJ/kg K for the specific heat of the oil. a. 1.9 m & 3.5 m b. 4.8 m d. 2.7 m

An oil is being cooled in certain equipment. It was observed that a 7.94 bmin of hot oil enters a negligible diameter thickness metal pipe of D= 25 mm. At the same time same mass of cooling water flows through the annular space between the pipe and a larger concentric pipe; the oil and water moving in opposite directions. The oil enters at 420 K and is to be cooled to 320 K. If the water enters at 290 K, what length of pipe will be required? Take coefficients of 1.6 kWim? K on the oil side and 3.6 KWim? K on the water side and 2.0 kJ/kg K for the specific heat of the oil. a. 1.9 m & 3.5 m b. 4.8 m d. 2.7 m

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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An oil is being cooled in certain equipment. It was observed that a 7.94 b/min of hot oil enters a negligible diameter thickness metal pipe of D= 25 mm. At the same time same mass of cooling water flows through the annular space between the pipe and a larger concentric pipe; the oil and water moving in opposite directions. The oil enters at 420 K and is to be cooled to 320 K. If the water enters at 290 K, what length of pipe will be required? Take coefficients of 1.6 kW/m? K on the oil side and 3.6 kWim? K on the water side and 2.0 kJ/kg K for the specific heat of the oil. a. 1.9 m & 3.5 m b. 4.8 m d. 2.7 m
Transcribed Image Text:An oil is being cooled in certain equipment. It was observed that a 7.94 b/min of hot oil enters a negligible diameter thickness metal pipe of D= 25 mm. At the same time same mass of cooling water flows through the annular space between the pipe and a larger concentric pipe; the oil and water moving in opposite directions. The oil enters at 420 K and is to be cooled to 320 K. If the water enters at 290 K, what length of pipe will be required? Take coefficients of 1.6 kW/m? K on the oil side and 3.6 kWim? K on the water side and 2.0 kJ/kg K for the specific heat of the oil. a. 1.9 m & 3.5 m b. 4.8 m d. 2.7 m
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