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http://dx.doi.org/10.3795/KSME-A.2010.34.3.307

Shape Design of Bends in District Heating Pipe System by Taguchi Method  

Choi, Moon-Deok (Dept. of Mechanical Engineering, Inha Univ.)
Kim, Joo-Yong (Dept. of Mechanical Engineering, Inha Univ.)
Ko, Hyun-Il (District Heating Technology Research Institute, Korea District Heating Corp.)
Cho, Chong-Du (Dept. of Mechanical Engineering, Inha Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.34, no.3, 2010 , pp. 307-313 More about this Journal
Abstract
In this study, alternative designs for the bends used in district heating pipes are investigated. The district heating pipes, which are subjected to temperatures of 10 to $120^{\circ}C$ and a water pressure of $16\;kgf/cm^2$, have to withstand thermomechanical cyclic loads when in use. These pipes comprise three concentric tubes: a steel pipe (internal), polyurethane (PUR) insulator (middle), and a high-density polyethylene (HDPE) case (external). In addition, the bends in the district heating pipe system are covered with foam pads that cause aging. In this study, an alternative bend design that does not involve the use of a foam pad is proposed to overcome the aging problem in the bends. In the proposed design, "shear rings" are added to the surface of a bend, and its dimensions are determined by a combination of the statistical (Taguchi) method and FEM. The geometrical parameters such as thickness, height, and number of the rings significantly affect the design optimization, and hence, they affect the results of the FEM.
Keywords
Taguchi Method; District Heating Pipe; Reinforced Fitting; Shear Ring; Finite Element Analysis;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By SCOPUS : 1
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