Maurice Tutor

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    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Computer Science Posted 16 Jul 2017 My Price 5.00

insulation material

A salesperson for insulation material claims that insulating exposed steam pipes in the basement of a large hotel will be cost-effective. Suppose saturated steam at 5.7 bars flows through a 30-cm-OD steel pipe with a 3-cm wall thickness. The pipe is surrounded by air at 20°C. The convection heat transfer coefficient on the outer surface of the pipe is estimated to be 25 W/m2 K. The cost of generating steam is estimated to be $5 per 109 J, and the salesman offers to install a 5-cm-thick layer of 85% magnesia insulation on the pipes for $200/m or a 10-cm-thick layer for $300/m. Estimate the payback time for these two alternatives, assuming that the steam line operates all year long, and make a recommendation to the hotel owner. Assume that the surface of the pipe as well as the insulation have a low emissivity and radiative heat transfer is negligible

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Maurice Tutor
(5)
Status NEW Posted 16 Jul 2017 05:07 PM My Price 5.00

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