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Analyzing the Performance and Control of a Hydronic Pavement System in a District Heating Network

1
Division of Energy Systems, Department of Management and Engineering, Linköping University, SE-581 83 Linköping, Sweden
2
Division of Building, Energy and Environment Technology, Department of Technology and Environment, University of Gävle, SE-801 76 Gävle, Sweden
*
Author to whom correspondence should be addressed.
Louise Ödlund (former Trygg).
Energies 2019, 12(11), 2078; https://doi.org/10.3390/en12112078
Received: 29 April 2019 / Revised: 27 May 2019 / Accepted: 27 May 2019 / Published: 30 May 2019
(This article belongs to the Special Issue District Heating and Cooling Networks)
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Abstract

A hydronic pavement system (HPS) is an alternative method to clear snow and ice, which avoids the use of salt, sand, and fossil fuel in conventional snow clearance, and minimizes the risk of accidents. The aim is to analyze the performance of different control strategies for a 35,000 m2 HPS utilizing heat from a district heating and cooling (DHC) system. The key performance indicators are (1) energy performance of the HPS, and (2) primary energy use, (3) electricity production and (4) greenhouse gas (GHG) emissions from the DHC system. The methodology uses a simulation model of the HPS and an optimization model of the DHC system. Three operational strategies are analyzed: A reference scenario based on the current control strategy, and scenarios where the HPS is shut down at temperatures below −10 °C and −5 °C. The study shows that the DHC return temperature is suitable for use. By operational strategies, use during peak demand in the DHC system can be avoided, resulting in reduced use of fossil fuel. Moreover, the energy use of the HPS could be reduced by 10% and the local GHG emissions by 25%. The study emphasizes that the HPS may have positive effects on global GHG emissions, as it enables electricity production from renewable resources. View Full-Text
Keywords: hydronic pavement system; district heating; primary energy use; energy system modeling; greenhouse gas emissions hydronic pavement system; district heating; primary energy use; energy system modeling; greenhouse gas emissions
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Blomqvist, S.; Amiri, S.; Rohdin, P.; Ödlund, L. Analyzing the Performance and Control of a Hydronic Pavement System in a District Heating Network. Energies 2019, 12, 2078.

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