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A Study on the Absorption of Thermal Stress on the Underground piping for the District heating  

Kong Jae Hyang (서울지방중소기업청 기술지원과)
Sin Byung Kug (SH 공사 집단에너지사업단)
Publication Information
Transactions of the Korean Society of Machine Tool Engineers / v.14, no.1, 2005 , pp. 81-88 More about this Journal
Abstract
There have been many studies on generation equipment and plant piping, but there is no significant study result on the heat transportation pipe. As such, this study established basic theory on the compensated method among buried pipe for regional heating, and further obtained the following results by applying the conditions of AGFW and NCHPP respectively in calculation of friction and maximum installation distance for the buried pipe. Friction coefficient according to the types and physical properties of soil, friction and maximum installation distance were compared to set the application value of friction coefficient according to the location of works. Calculation formula of clay load to be applied for calculation of friction was introduced to the formula of AGFW and the formula of NCHPP that has been used in Nowon district since 1997 to determine the difference and applicability. $120^{\circ}C$ and $95^{\circ}C$ were applied in temperature difference for expansion volume to compare the arm length at the curve pipe so thai it can be reflected in the design in the future. Maximum installation distance according to thickness of pipe was compared to present the necessity of unified specification so that same kinds of pipe materials can be used for same kinds of works.
Keywords
plant pipe; buried pipe for regional heating; friction coefficient; AGFW; NCHPP; Mass Energy; stress indices; central heating;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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