The heat balance of road snow was analyzed to examine ice-film formation and to determine the characteristics of heat balance on a natural snow cover. The main heat source used to melt natural snow cover is solar radiation. However, the results of the analysis indicated that the absorbed solar radiation is reduced due to the high albedo of snow and therefore cannot compensate for the heat loss by long-wave radiation. This occurrence results in negative net radiation during winter. To evaluate the heat balance on road snow, the infrared radiation from vehicles was estimated by measuring vehicle temperatures. These measurements indicated that heat input applied to snow decreased with vehicle speed and increased with traffic volume. A new index—the shading time—was developed and is defined as the amount of time a section of road is shadowed by vehicles. It was established that incoming long-wave radiation increased by 50 percent during 20 minutes of shading time and that the net radiation became positive, suggesting that snow melting occurred on roads with heavy traffic flow, even in winter.


    Zugriff

    Download

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Contributions of Heat from Traffic Vehicles to Snow Melting on Roads


    Weitere Titelangaben:

    Transportation Research Record: Journal of the Transportation Research Board


    Beteiligte:


    Erscheinungsdatum :

    01.01.1999




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    SNOW-MELTING LED TRAFFIC SIGNAL

    SUZUKI TOSHIHIRO / IMAO MICHIAKI | Europäisches Patentamt | 2016

    Freier Zugriff

    The removal and the melting of snow on roads

    Fukuda, T. | British Library Conference Proceedings | 1997


    TRAFFIC SIGNAL LIGHT SNOW MELTING UNIT

    ABE SHINYA / TODA TSUTOMU | Europäisches Patentamt | 2019

    Freier Zugriff

    SNOW MELTING TYPE LED TRAFFIC SIGNAL

    SAKAIYA SADAO | Europäisches Patentamt | 2016

    Freier Zugriff