Design, Construction, and Operation of a Monitored District Heating Pipeline System
Publication: Journal of Pipeline Systems Engineering and Practice
Volume 10, Issue 3
Abstract
The need for understanding the performance of district heating pipeline systems has led to the development of a monitoring program. This program includes the design of the connection of an instrumented section of piping within an in-use district heating network. The design complies with the current European district heating recommendations and standards. Monitoring consists of the measurement of earth pressures against the pipes, axial pipe displacements, and temperature of the fluid and soil around the pipes. There are different conditions being tested such as thickness of insulation materials, temperature ranges, and bedding soil type. In particular, there is interest in testing the corner positions. Details of the piping and instrumentation arrangements as well as soil geotechnical characteristics are presented. It was found that when the fluid temperature increased from ambient conditions up to 90°C, pipes were moving all along their length. Moreover, after a fluid temperature drop from 90°C to 20°C over 20 days and subsequent increase to 90°C again, pipe axial displacements did not return to the same values as before.
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Acknowledgments
This work is part of ongoing research programs on district heating by AGFW for the development and improvement of pipeline networks. The authors are especially grateful to the BMWi German Federal Ministry of Economics and Energy for the funding support to these ongoing research programs (Funding code 03ET13335). The first author would like to greatly acknowledge the funding support granted by ZEIT Stiftung by means of an Academic Fellowship at HafenCity University Hamburg.
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Published In
Journal of Pipeline Systems Engineering and Practice
Volume 10 • Issue 3 • August 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Mar 28, 2018
Accepted: Dec 7, 2018
Published online: Apr 29, 2019
Published in print: Aug 1, 2019
Discussion open until: Sep 29, 2019
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