Evaluate the heat transfer rate


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Q: An oil pre-heater consists of a ingle tube of 10 mm diameter and 5m length, with its surface maintained at 175°C by swirling combustion gases. The engine oil (new) enters at 75°C. What flow rate must be supplied to maintain an oil outlet temperature of 100°C? What is the corresponding heat transfer rate?

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Mechanical Engineering: Evaluate the heat transfer rate
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