Ventilating an underground railway environment in which there is to be heavy traffic of electrically propelled rapid transit trains differ from those normally encountered in air-conditioning work. The heat generated by the train motors and electric lighting, together with body heat from passengers, is so great that excessive temperatures would prevail in summer unless a volume of air in excess of that required for breathing is supplied. The installation of in car air-conditioning units adds another major heat release source in the tunnel. This heat must be ejected to make using in car air-conditioning units worthwhile. This part of the paper investigates potential methods of delivering cooling to underground railways environment. The suitability of each cooling method is assessed with the help of a purposely developed mathematical model, which has been discussed at length in part two of the paper, to investigate the heat load in a generic underground railways environment. For each cooling method, the model predicts the tunnel and train carriage temperatures and relative humidities together with the PPD.


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    Title :

    Underground railway environment in the UK: Part 3: Methods of delivering cooling


    Contributors:
    Ampofo, F. (author) / Maidment, G. (author) / Missenden, J. (author)

    Published in:

    Applied Thermal Engineering ; 24 , 5-6 ; 647-659


    Publication date :

    2004


    Size :

    13 Seiten, 3 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    Underground railway environment in the UK Part 1: Review of thermal comfort

    Ampofo, F. / Maidment, G. / Missenden, J. | Tema Archive | 2004


    Underground railway environment in the UK Part 2: Investigation of heat load

    Ampofo, F. / Maidment, G. / Missenden, J. | Tema Archive | 2004


    Underground railway or underground tramway

    Lambert, W. | Engineering Index Backfile | 1965


    Underground railway signaling

    Lentz, G. | Engineering Index Backfile | 1954


    Tokyo underground railway

    Totake, T. | Engineering Index Backfile | 1935