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http://dx.doi.org/10.6110/KJACR.2011.23.1.054

Surface Temperature Control of an Insulated Horizontal Pipe under Thermal Radiation Environment  

Kang, Byung-Ha (School of Mechanical Engineering, Kookmin University)
Pi, Chang-Hun (Graduate School, Kookmin University)
Kim, Suk-Hyun (School of Mechanical Engineering, Kookmin University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.23, no.1, 2011 , pp. 54-60 More about this Journal
Abstract
Procedures for estimation of insulation thickness for a horizontal pipe for condensation control or personnel protection has been investigated, parallel to the previous work of a vertical wall case. Parameters include pipe diameter, emissivity, thermal conductivity, and operating temperatures. The results indicated that the surface emissivity plays a very important role in the design of insulation, specially for the case of high temperature application with low Bi. The effect of surface radiation in such case could be up to 65% of the total. Required insulation thickness for the surface temperature control increases as pipe diameter increases and as surface emissivity decreases. Adequate revision of specifications or standards to include newly invented insulation materials with high emissivity has been also suggested.
Keywords
Insulation thickness; Surface temperature control; Horizontal pipe; Surface radiation; Radiation Coefficient;
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