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4. The oil in an engine is cooled by air in a cross-flow heat exchanger where both fluids are unmixed. Atmos- Wpheric air enters at 30°C and 0.53 kg/s. Oil at 201028 0.026 kg/s enters at 75°C and flows through a tube of 10-mm diameter. (a) Assuming fully developed flow and constant wall heat flux, estimate the oil-side heat transfer coefficient. (b) If the overall heat transfer coefficient is 53 W/(m² K), and the total heat transfer area is 1 m². Determine the effectiveness. (c) Continue from (b), what is the exit temperature of the oil?

4. The oil in an engine is cooled by air in a cross-flow heat exchanger where both fluids are unmixed. Atmos- Wpheric air enters at 30°C and 0.53 kg/s. Oil at 201028 0.026 kg/s enters at 75°C and flows through a tube of 10-mm diameter. (a) Assuming fully developed flow and constant wall heat flux, estimate the oil-side heat transfer coefficient. (b) If the overall heat transfer coefficient is 53 W/(m² K), and the total heat transfer area is 1 m². Determine the effectiveness. (c) Continue from (b), what is the exit temperature of the oil?

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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4. The oil in an engine is cooled by air in a cross-flow heat exchanger where both fluids are unmixed. Atmos- Wpheric air enters at 30°C and 0.53 kg/s. Oil at 201028 0.026 kg/s enters at 75°C and flows through a tube of 10-mm diameter. (a) Assuming fully developed flow and constant wall heat flux, estimate the oil-side heat transfer coefficient. (b) If the overall heat transfer coefficient is 53 W/(m² K), and the total heat transfer area is 1 m². Determine the effectiveness. (c) Continue from (b), what is the exit temperature of the oil?
Transcribed Image Text:4. The oil in an engine is cooled by air in a cross-flow heat exchanger where both fluids are unmixed. Atmos- Wpheric air enters at 30°C and 0.53 kg/s. Oil at 201028 0.026 kg/s enters at 75°C and flows through a tube of 10-mm diameter. (a) Assuming fully developed flow and constant wall heat flux, estimate the oil-side heat transfer coefficient. (b) If the overall heat transfer coefficient is 53 W/(m² K), and the total heat transfer area is 1 m². Determine the effectiveness. (c) Continue from (b), what is the exit temperature of the oil?
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