Asked by Anonymous

a. Steam at 230oC flows through a steel pipe ( = 15/.
) whose inner and outer
diameters are 9 cm and 10 cm, respectively in an environment at 15oC. The pipe is
insulated with 5 cm thick fiberglass ( = 0.035/.
). The given heat transfer
coefficients on the inside and the outside of the pipe are 170/.
and 38/
.
respectively.
Calculate the heat transfer rate across the steel pipe.

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