Determine the water inlet and outlet temperatures

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Reference no: EM131282283

A double-pipe heat exchanger is used to condense steam at 7370 N/m2. Water at an average bulk temperature of 10°C flows at 3.0 m/s through the inner pipe, which is made of copper and has a 2.54-cm ID and a 3.05-cm OD. Steam at its saturation temperature flows in the annulus formed between the outer surface of the inner pipe and an outer pipe of 5.08-cm-ID. The average heat transfer coefficient of the condensing steam is 5700 W/m2 K, and the thermal resistance of a surface scale on the outer surface of the copper pipe is 0.000118 m2 K/W.

(a) Determine the overall heat transfer coefficient between the steam and the water based on the outer area of the copper pipe and sketch the thermal circuit.

(b) Evaluate the temperature at the inner surface of the pipe.

(d) Determine the water inlet and outlet temperatures.

Reference no: EM131282283

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