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- W3162266408 abstract "An external geothermal bridge de-icing system deploys hydronic loops covered in insulation and attached to bridge decks to heat the bridge using geothermal energy. Several studies were performed on the laboratory system under controlled temperatures and showed promising results for field deployment. However, no field tests or investigations of its heating performance were conducted during snow events. In this study, the external geothermal bridge de-icing system was deployed on a mock-up bridge deck in the field and tested during several winter events, providing an opportunity to conduct non-heating, heating, and de-icing tests. A 3-dimensional multi-physics finite element model of the heated deck was developed in COMSOL and fully calibrated with the field tests in transient analyses. The simulated temperatures were verified with the measured thermocouple readings at the inlet and outlet of the bridge loops and different bridge deck depths. Based on the calibrated FEM model, a record snowfall event in the Spring of 2015 was simulated using the equivalent snow-melting heat flux loss on the deck surface. The heated bridge deck maintained a minimum temperature of 0.3 °C (32.6 °F) during the snow event with a supplied inlet temperature of 43.3 °C (110 °F), and the equivalent heat flux loss on the deck surface was around 220 W/m2. The developed FEM model provided satisfactory simulations of bridge heating in winter events. The external geothermal bridge de-icing system maintained a snow-free deck during the record snow event and is ready for implementation." @default.
- W3162266408 created "2021-05-24" @default.
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- W3162266408 date "2021-08-01" @default.
- W3162266408 modified "2023-09-25" @default.
- W3162266408 title "Heating performance of a novel externally-heated geothermal bridge de-icing system: field tests and numerical simulations" @default.
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- W3162266408 doi "https://doi.org/10.1016/j.seta.2021.101280" @default.
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