Consider refrigerant R-134a flowing in a smooth,

Chapter 10, Problem 10.42

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Consider refrigerant R-134a flowing in a smooth, hori-zontal, 10-mm-inner-diameter tube of wall thickness2 mm. The refrigerant is at a saturation temperature of15?C (for which ?v,sat?23.75 kg/m3) and flows at arate of 0.01 kg/s. Determine the maximum wall tem-perature associated with a heat flux of 105W/m2at the inner wall at a location 0.4 m downstream from theonset of boiling for tubes fabricated of (a) pure copperand (b) AISI 316 stainless steel.

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