Consider the flow of engine oil (cp = 2048 J/kg·K) through a thin-walled copper tube at a rate of 0.3 kg/s. The engine oil that enters the copper tube at an inlet temperature of 80°C is to be cooled by cold water (cp = 4180 J/kg·K) flowing at a temperature of 20°C. It is desired to have exit temperature of the engine oil not greater than 40°C. The individual convective heat transfer coefficients on oil and water sides are 750 W/m2·K and 350 W/m2·K, respectively. If a thermocouple probe installed on the downstream side of the cooling water measures a temperature of 32°C, for a double pipe parallel flow heat exchanger determine (a) mass flow rate of the cooling water (b) log mean temperature difference, and (c) area of heat exchanger.
Consider the flow of engine oil (cp = 2048 J/kg·K) through a thin-walled copper tube at a rate of 0.3 kg/s. The engine oil that enters the copper tube at an inlet temperature of 80°C is to be cooled by cold water (cp = 4180 J/kg·K) flowing at a temperature of 20°C. It is desired to have exit temperature of the engine oil not greater than 40°C. The individual convective heat transfer coefficients on oil and water sides are 750 W/m2·K and 350 W/m2·K, respectively. If a thermocouple probe installed on the downstream side of the cooling water measures a temperature of 32°C, for a double pipe parallel flow heat exchanger determine (a) mass flow rate of the cooling water (b) log mean temperature difference, and (c) area of heat exchanger.
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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Question
Consider the flow of engine oil (cp = 2048 J/kg·K)
through a thin-walled copper tube at a rate of 0.3 kg/s. The
engine oil that enters the copper tube at an inlet temperature
of 80°C is to be cooled by cold water (cp = 4180 J/kg·K)
flowing at a temperature of 20°C. It is desired to have exit
temperature of the engine oil not greater than 40°C. The individual
convective heat transfer coefficients on oil and water
sides are 750 W/m2·K and 350 W/m2·K, respectively. If a
thermocouple probe installed on the downstream side of the
cooling water measures a temperature of 32°C, for a double
pipe parallel flow heat exchanger determine (a) mass flow
rate of the cooling water (b) log mean temperature difference,
and (c) area of heat exchanger.
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