Modeling the thermal performance of low temperature hydronic heated pavements

Johnsson, Josef; Adl‐Zarrabi, Bijan

doi:10.1016/j.coldregions.2019.03.007

Cited by 17 publications

(7 citation statements)

References 16 publications

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“…As shown in Figure 52, the chimney efficiency could reach 15% at the chimney height of 9 m whereas the efficiency is 11.7% at the chimney height of 4 m; this implies that the efficiency of the chimney increases with the chimney height. Johnsson and Adl-Zarrabi [53,54] developed a 3D model of the SRES based on finite difference method (FDM) to study energy usage and de-icing performance. Figure 53 shows that the entire calculation domain of the model is partitioned into segments along z-axial direction, and there are the same thermal properties.…”

Section: Solar Roadway Energy Systemmentioning

confidence: 99%

Techno-Economic Comprehensive Review of State-of-the-Art Geothermal and Solar Roadway Energy Systems

et al. 2022

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Road infrastructure is a vital constituent element in the transportation network; however, roadway surface ice and snow accumulation leads to huge traffic accidents in winter. Geothermal roadway energy systems (GRES) and solar roadway energy systems (SRES) can increase or decrease roadway surface temperature for the de-icing and removal of snow in winter, or mitigation of heat in summer. Technology performance and economic evaluation of the GRES and SRES are reviewed in this paper based on numerical and economic models, and experimental analyses. Three crucial aspects of the technology performance assessment, i.e., roadway surface temperature, energy consumption and key factors, are explored in different regions and countries. Economic evaluation approaches for net present values and payback periods of the GRES and SRES are investigated. The recommendations and potential future developments on the two technologies are deliberated; it is demonstrated that the GRES and SRES could increase roadway surface temperature by around 5 °C in winter and decrease it by about 6 °C in summer, with the payback periods of 4 to 8 years and 2.3 to 5 years, respectively.

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Section: Solar Roadway Energy Systemmentioning

confidence: 99%

Techno-Economic Comprehensive Review of State-of-the-Art Geothermal and Solar Roadway Energy Systems

et al. 2022

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“…The magnitude of harvested energy is calculated by HyRoSim (a software developed by the authors), which builds on a numerical model for the HHP [11] and a modified numerical borehole storage model Pygfunction [17]. The two models are combined as shown in Fig.…”

Section: Calculation Of Harvested Energymentioning

confidence: 99%

“…The thermal connections between subsequent segments (z-direction) are represented by the convective heat transfer in the pipes. Further details regarding the HHP model are found in Johnsson and Adl-Zarrabi [11].…”

Section: Calculation Of Harvested Energymentioning

confidence: 99%

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A numerical and experimental study of a pavement solar collector for the northern hemisphere

Johnsson

Adl‐Zarrabi

2020

Applied Energy

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“…Despite the low operational costs, chemical de-icing agents are harmful to the environment, whereas mechanical snowploughs are time-consuming [3] and require expensive maintenance. In the last decades, the hydronic road-heating system (HRS) was proposed as alternative snow melting method to prevent the build-up of snow and ice on roads [4], especially on slopes, bends and bridges [5] in cold regions. HRS is preferred in several cases, because it is more reliable, potentially cost-effective and environmentalfriendly [6].…”

Section: Introductionmentioning

confidence: 99%

Hydronic Road-Heating Systems: Environmental Performance and the Case of Ingolstadt Ramps

Ahmed

Conti

Bayer

et al. 2022

Environmental and Climate Technologies

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Snowfall and ice formation on road surface significantly impact the safety of driving conditions. To resolve this, every year salt and de-icing chemicals are sprinkled on roads. However, use of salts and snow ploughing have environmental as well as economical disadvantages. To resolve these problems, hydronic road heating systems are valid alternatives. Heat transfer fluid, i.e. mixture of ethanol and water, is pumped into a tubular circulation system under the asphalt. By this technology, the road and pavements shall stay ice-free even in times of snowfall and temperatures below the freezing point. The system can also be used to cool the asphalt in case of extreme heat, which – besides the heating effect – could also prevent road from damages in extreme summers. This study aims to compare the environmental impact of use of salts and road-heating system in terms of GHG emissions. To assess the environmental impact, an operational road heating system for a ramp in Ingolstadt, Germany, is considered. A cradle-to-grave analysis technique is used to determine the environmental effects based on a life-cycle assessment (LCA) framework. The analysis includes nine components solemnly responsible for hydronic heating of asphalt surface such as local heating pipe, insulation, pumps, and heat meters. Comparison is performed in terms of relative and total impact over 50-year lifetime of three heated ramps having 1989 m2 surface area in total. The results show that the asphalt and heating-circuit causes the major fraction (65 %) of overall GHG emissions, with total life-time emissions of 28.10 kg CO2 eq./m2 of heated surface. During an operational life of 50 years, road heating systems emit 18 % less CO2 eq./m2 as compared to the use of salts.

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Modeling the thermal performance of low temperature hydronic heated pavements

Cited by 17 publications

References 16 publications

Techno-Economic Comprehensive Review of State-of-the-Art Geothermal and Solar Roadway Energy Systems

Techno-Economic Comprehensive Review of State-of-the-Art Geothermal and Solar Roadway Energy Systems

A numerical and experimental study of a pavement solar collector for the northern hemisphere

Hydronic Road-Heating Systems: Environmental Performance and the Case of Ingolstadt Ramps

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