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contributor authorShenglan Jing
contributor authorZhuoyu Zan
contributor authorChongfang Song
contributor authorJianwei Zhang
contributor authorYonggang Lei
contributor authorFei Wang
contributor authorXinyi Li
date accessioned2022-01-30T20:03:49Z
date available2022-01-30T20:03:49Z
date issued2020
identifier other%28ASCE%29PS.1949-1204.0000451.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4266451
description abstractThe temperature variation of the district heating (DH) pipelines during the operation is the most severe threat to the lifetime of the systems. The number of cycles used in the fatigue analysis in the European standard were based on the lEA projects, and there were no sufficient studies conducted in China. This paper aims to make reasonable estimations of the maximum number of temperature load cycles for DH pipelines in China. Based on the data, the rain flow cycle-counting algorithms were applied to calculate the number of full temperature cycles. The regression models of design lines between full temperature cycles and temperature variations were established. The maximum values for supply pipelines and return pipelines were obtained by using the design lines. The equivalent full action cycles (b=4 and ΔTref=110°C) are about 200 cycles for supply pipelines and 136 cycles for return pipelines which are both less than 250 cycles recommended in the European standard. Using 200 for the supply pipelines and 136 for the return pipelines, the stress limits could increase from 707 to 750 MPa and from 707 to 823 MPa respectively.
publisherASCE
titleThermal-Fatigue Analysis of District-Heating Pipelines in China
typeJournal Paper
journal volume11
journal issue2
journal titleJournal of Pipeline Systems Engineering and Practice
identifier doi10.1061/(ASCE)PS.1949-1204.0000451
page04020011
treeJournal of Pipeline Systems Engineering and Practice:;2020:;Volume ( 011 ):;issue: 002
contenttypeFulltext


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