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Determine the length of the tubes in the tube bank

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Reference no: EM133201707

Most chemical plants use water from a nearby lake, pond or river as a utility fluid for heat exchangers to cool down process streams. After absorbing heat from the chemical process, the water needs to be cooled back to a temperature that will not shock the ecosystem when it empties back into the lake, pond or river. To accomplish the cooling step, the water flows on the internal side of a tube bank while wind (air) passes externally over the tubes in the tube bank. The tube bank has a uniform outside surface temperature of 60 oC, and the wind passes through the tube bank at T∞ = 26 oC with v∞ = 2.57 m/s. The dimensions of the tube bank are given below. The air moves through quickly and does not absorb enough heat to increase the temperature so TIN = TOUT.

TUBE BANK DETAILS:

ALIGNED conformation

Tube outside diameter = 1.44 cm

Number of transverse columns, NT = 12 Number of longitudinal rows, NL = 8 Transverse Pitch, ST = 2.88 cm

Longitudinal Pitch, SL = 2.16 cm

Tube length = design parameter (unknown)

Determine the length of the tubes in the tube bank, L, needed to remove heat from the tubes at a rate of 92 kW.

Reference no: EM133201707

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