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
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: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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