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adrian116
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the question is that:
A steam pipe with a radius of 2.00cm, carrying steam at 140 degree celcius, is surrounded by a cylindrical jacket with inner and outer radii 2cm and 4cm and made of a type of cork with thermal conductivity 4x10^(-2) W/m K. This in turn is surrounded by a cylindrical jacket made of a brand of Styrofoam with thermal conductivity 1x10^(-2) W/m K and having inner and outer radii 4 cm and 6 cm. The outer suface of the Styrofoam is in contact with air at 15 degree celcius. Assume that this outer surface has a timperature of 15 degree celcius.
a) What is the timperature at a radius of 4 cm, where the two isulating layers meet?
b) What is the total rate of transfer of heat out of a 2 m length of pipe?
thx of attention
A steam pipe with a radius of 2.00cm, carrying steam at 140 degree celcius, is surrounded by a cylindrical jacket with inner and outer radii 2cm and 4cm and made of a type of cork with thermal conductivity 4x10^(-2) W/m K. This in turn is surrounded by a cylindrical jacket made of a brand of Styrofoam with thermal conductivity 1x10^(-2) W/m K and having inner and outer radii 4 cm and 6 cm. The outer suface of the Styrofoam is in contact with air at 15 degree celcius. Assume that this outer surface has a timperature of 15 degree celcius.
a) What is the timperature at a radius of 4 cm, where the two isulating layers meet?
b) What is the total rate of transfer of heat out of a 2 m length of pipe?
thx of attention