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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Probability of Failure Assessment in District Heating Network
Author(s)
Paweł Gilski, Ewa Krecielewska, Jean-Marc Lucatelli, Bertrand Bouttier and Yannick Gourbeyre
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DOI:10.17265/1934-8975/2015.06.002
Affiliation(s)
ABSTRACT
The aim of this paper is to present works performed
in HTC (Heat-Tech Center), Research & Development Centre of Veolia Group located
in Warsaw regarding assessment of probability of failure in DHN (district
heating network). This work is a part of a project dedicated to develop a
software which objective is to increase reliability of DHN. The research methods
consisted of three
approaches. First, using database of failures which happened in Warsaw DHN and repairing
protocols from past 10 years, a statistics approach was applied to perform
first analysis. The result was that pipelines with nominal diameter DN
(nominal diameter) ≤ 150 had higher failure rate per km, than pipelines
with DN
>
150.
The next step of research was to study influence of internal (corrosion caused by
heat carrier, quality of materials) and external (stray currents) factor in order
to assess its individual influence on failure rate of pipe and explain reasons of
differences in failure rate. To end a FMEA (failure mode and effects analysis) will
aim to identify the main failures modes appearing on DHN, to estimate the main causes
of these failures and to propose the best solutions regarding the causes, the costs
and
the means available.
KEYWORDS
DHN, failures, failure analysis, Warszawa, Warsaw
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