You are tasked to layout a cross-flow heat exchanger where both fluids remair unmixed. Unused engine oil is cooled at a flow rate of 3 kg/s. The oil enters th heat exchanger at 85.5°C and is cooled to 45°C. Water is used as the cooling medium at a flow rate of 2 kg/s, entering at 40°C and exiting at 60°C. The flov conditions in this heat exchanger yield the following convective heat transfer coefficients: h; = 8,000 W/m²/K and h, = 15,000 W/m²/K. Determine the following: 1. What is the area required to achieve the proposed performance? 2. During the design process it is recognized that the oil will cause fouling. Th fouling coefficient is assumed to be 9.00*10-5 m²*K/W. How much larger will the area have to be to yield the same performance as in the clean state from part a?

You are tasked to layout a cross-flow heat exchanger where both fluids remair unmixed. Unused engine oil is cooled at a flow rate of 3 kg/s. The oil enters th heat exchanger at 85.5°C and is cooled to 45°C. Water is used as the cooling medium at a flow rate of 2 kg/s, entering at 40°C and exiting at 60°C. The flov conditions in this heat exchanger yield the following convective heat transfer coefficients: h; = 8,000 W/m²/K and h, = 15,000 W/m²/K. Determine the following: 1. What is the area required to achieve the proposed performance? 2. During the design process it is recognized that the oil will cause fouling. Th fouling coefficient is assumed to be 9.0010-5 m²K/W. How much larger will the area have to be to yield the same performance as in the clean state from part a?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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