Article | Proceedings of The 60th SIMS Conference on Simulation and Modelling SIMS 2019, August 12-16, Västerås, Sweden | Uncertainty in Hourly Readings from District Heat Billing Meters Linköping University Electronic Press Conference Proceedings
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Title:
Uncertainty in Hourly Readings from District Heat Billing Meters
Author:
Lukas Lundström: Mälardalens University, Västerås, Sweden Erik Dahlquist: Eskilstuna Kommunfastighet, Eskilstuna, Sweden
DOI:
https://doi.org/10.3384/ecp20170212
Download:
Full text (pdf)
Year:
2019
Conference:
Proceedings of The 60th SIMS Conference on Simulation and Modelling SIMS 2019, August 12-16, Västerås, Sweden
Issue:
170
Article no.:
032
Pages:
212-216
No. of pages:
5
Publication type:
Abstract and Fulltext
Published:
2020-01-24
ISBN:
978-91-7929-897-5
Series:
Linköping Electronic Conference Proceedings
ISSN (print):
1650-3686
ISSN (online):
1650-3740
Publisher:
Linköping University Electronic Press, Linköpings universitet


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Hourly energy readings from heat billing meters are valuable data source for the energy performance assessment of district heating substations and the buildings they serve. The quality of such analyses is bounded by the accuracy of the hourly readings. Thus, assessing the accuracy of the hourly heat meter readings is a necessary (but often overlooked) first step to ensure qualitative subsequent analyses. Due to often limited bandwidth capacity hourly readings are quantized before transmission, which can cause severe information loss. In this paper, we study 266 Swedish heat meters and assess the quantization effect by information entropy ranking. Further, a detailed comparison is conducted with three heat meters with typically occurring quantization errors. Uncertainty due to the quantization effect is compared with the uncertainty due to typical accuracy of the meter instrumentation. A method to conflate information from both energy readings and energy calculated from flow and temperature readings is developed. The developed conflation method is shown to be able to decrease uncertainty for heat meters with severely quantized energy readings. However, it is concluded that a preferable approach is to work with the heat meter infrastructure to ensure the future recorded readings holds high enough quality to be useful for energy performance assessments with hourly or sub-hourly readings.

Keywords: heat meters, uncertainty, district heating, information entropy, EN 1434

Proceedings of The 60th SIMS Conference on Simulation and Modelling SIMS 2019, August 12-16, Västerås, Sweden

Author:
Lukas Lundström, Erik Dahlquist
Title:
Uncertainty in Hourly Readings from District Heat Billing Meters
DOI:
10.3384/ecp20170212
References:

EIFS 2014:2. Energimarknadsinspektionens författningssamling, Swedish Energy Markets Inspectorate regulatory code. EIFS, 2014.

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F. Sandin, J. Gustafsson, and J. Delsing. Fault detection with hourly district data. Stockholm, Sweden. 2013.

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Proceedings of The 60th SIMS Conference on Simulation and Modelling SIMS 2019, August 12-16, Västerås, Sweden

Author:
Lukas Lundström, Erik Dahlquist
Title:
Uncertainty in Hourly Readings from District Heat Billing Meters
DOI:
https://doi.org10.3384/ecp20170212
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Last updated: 2019-11-06