Water at 15ºC is to be heated to 65ºC by passing it over a bundle of 4-m-long 1-cm-diameter resistance heater rods maintained at 90ºC. Water approaches the heater rod bundle in normal direction at a mean velocity of 0.8 m/s. The rods arc arranged in-line with longitudinal and transverse pitches of SL  4 cm and ST  3 cm. Determine the number of tube rows NL in the flow direction needed to achieve the indicated temperature rise.

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Q: e- Water at 12 °C is to be heated to 60 °C by passing it over a bundle of 3-m-long, 2-cm-diameter…

A:

Q: Choose the right answer 1. The mean Nusselt number for fully developed laminar flow in a circular…

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