A heat exchanger is built so that gases from combustion at 425°C flow into a copper pipe of 2.5 cm diameter and 1.6 mm t

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A Heat Exchanger Is Built So That Gases From Combustion At 425 C Flow Into A Copper Pipe Of 2 5 Cm Diameter And 1 6 Mm T 1 (68.61 KiB) Viewed 28 times

A heat exchanger is built so that gases from combustion at 425°C flow into a copper pipe of 2.5 cm diameter and 1.6 mm thick. A 5.0 cm tube diameter is placed concentric to the copper tube, and water pressurized circulates through the annular space between the tubes (1.5 kg-s of water enter at 150 °C and exit at 145 °C). Estimate the length of the heat exchanger if the gas flow of combustion is 0.8 kg/s (consider the properties of the combustion gases such as air at atmospheric pressure and 425°C). It is justified to consider the strength of copper tubes in your calculations, Estimate the contribution of resistance to the conduction in the overall heat transfer coefficient How much material would be possible to save with a configuration to Backflow?