Abstract
Underground railway systems, can generate heat from their operations to raise the temperatures of carriages and the station substantially. This may lead to passenger discomfort and complain especially in warm weather conditions that prevail in Tehran if underground environment is not cooled. Transportation air conditioning Committee of American Society of Heating, Refrigerating and air-conditioning Engineers proposed the Relative Warmth Index for thermal comfort design and investigation in subway environment. In this research, thermal comfort at Tehran metro stations and carriages of lines 1 and 2 has been studied using this index. The measurements were taken during two periods of September 2006 and July 2007 at different zones of stations. For this purpose, temperature, relative humidity and air velocity were measured at different times. The status of the air-conditioning systems together with passenger traffic was also recorded. A total number of 231 measurements including 114 and 117 measurements were carried out in September 2006 and in July 2007 respectively. The measurements in September 2006 did not exceed the thermal limit. However, it did exceed in July 2007. In comparison, with thermal comfort level of metros all over the world, Tehran Metro stands in an acceptable condition, while the maximum capacity of air-conditioning systems was not used, if so the thermal comfort condition would be better.
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Aarnio, P.; Yli-Tuomi, T.; Kousa, A.; Mäkelä, T.; Hirsikko, A.; Hämeri, K.; Räisänen, M.; Hillamo, R.; Koskentalo, T. Jantunen, M., (2005). The concentrations and composition of and exposure to fine particles (PM2.5) in the Helsinki subway system, Atmos. Environ., 39(28), 5059–5066.
Ampofo, F.; Maidment G.; Missenden, J., (2003). Underground railway environment in the UK, Part 3: Methods of delivering cooling, Appl. Therm. Eng., 24(5–6), 647–659.
Ampofo, F.; Maidment G; Missenden, J., (2004). Underground railway environment in the UK, Part 1: Review of thermal comfort, Appl. Therm. Eng., 24(5–6), 611–631.
ASHRAE, (2004). ASHRAE Standard 55-2004. Thermal environmental conditions for human occupancy, American Society of heating ventilation and air conditioning.
ASHRAE, (2002). ASHRAE Insights, American Society of heating ventilation and air conditioning guidelines for Railway HVAC. 17 (4).
ASHRAE, (1989). ASHRAE standards 62-1989, Ventilation for acceptable indoor air quality, American Society of heating ventilation and air conditioning.
ASHRAE, (1989). Addendum to standard 62-1989: New ventilation rates proposal, American Society of heating ventilation and air conditioning, 10–11.
Bedford, T., (1936). The warmth factor in comfort at work, Medical Research Council and Department of Scientific and Industrial Research, Industrial Health Research Board Report, No. 76.
Booth, W.; Galliers, S., (2001). Quality environments for public transport buildings, BSRIA report, DETR Ref. No: CI 11-38/6/160, Ref. No: SS70180.
Chadderton, D., (1997). Air Conditioning, a practical introduction, Thomson Science professional, 2nd. Ed., Chapter 2, 37–67.
Cheng, S.; Ho, L., (2004). Influence of platform screen doors on energy consumption of the environment control system of a mass rapid transit system: case study of the Taipei MRT system, Energ. Convers. Manage., 45(5), 639–650.
Fanger, P., (1970). Thermal Comfort: Analysis and application in Environmental engineering, McGraw-Hill.
Fernandez, A.; Ashmore, M., (1995). Exposure of commuters to carbon monoxide in Mexico City II: Comparison of in vehicle and fixed — site concentrations, J. Expo. Anal. Environ. Epid., 5(4), 495–510.
Glover, J., (2001). Flywheels for traction power: energy-saving potential of the Urenco trackside energy storage system, Modern Railways (June), 14.
Hickish, D., (1955). Thermal sensations of workers in light industry in summer, A field study in southern England, J. Hyg., Camb., 53(1), 112–113.
Humphreys M.A. and Nicol J.F. (2002) The validity of ISO-PMV for predicting comfort votes in every-day thermal environments. Energ. Build., 34(6), 667–684
ISO 7730, (1994). Moderate thermal environments — determination of the PMV and PPD indices and specification of the conditions for thermal comfort, ISO, Geneva
Jenkins, P.; Philips, T.; Mulbert, J.; Hui, S., (1992). Activity patterns of Californians: Use of and proximity to indoor pollutant sources. Atmos. Environ., 26A(12), 291–297.
Metro Bits’ Website, (2008). http://www.mic-ro.com/metro/
Nieuwenhuijsen, M.;Gomez-Perales, J.; Colvile, R., (2007). Levels of particulate air pollution, its elemental composition, determinants and health effects in metro systems, Atmospher. Environ., 41(37), 7995–8006.
Oakland Innovation and Information Services Ltd, (2002). Cambridge Science Park, Milton road, Cambridge, CB4 0FH, Thermal comfort on trains.
Ordody, P., (2000). Thermal comfort in the passenger areas of the Budapest Metro, Periodica Polytechnica Ser. Mech. Eng., 44(2), 309–317.
Overmeyer, E. J., (1961). How face air velocity affects airplane passenger comfort, ASHRAE J., 3(8), 41–44.
Parker, J., (1972). Air-conditioning related to passenger environment, C32/72, Railway Division Conference on Passenger Environment, IMechE, 58–63.
Pribek, P., (1989a). Summary and evaluation of the measurement of air velocity in deep stations, Metro Fomérnökség, Budapest.
Pribek, P., (1989b). Comparative evaluation of air measurements of metro lines, Metró Fomérnökség, Budapest. SES, (1976). Subway Environmental design handbook, principles and applications, Associate Engineers, 2nd. Ed. 1, March.
Shih-Cheng, H.; Jen-Ho, L., (2004). Influence of platform screen doors on energy consumption of the environment control system of a mass rapid transit system: case study of the Taipei MRT system, Energ. Convers. Manage., 45(5), 639–650.
Tehran Metro Public Relations, (2006), Tehran and suburban metro map, http://www.tehranmetro.com.
Tian-Tian L.; Yu-Hua B.; Zhao-Rong L.; Jin-Long L., (2007). In-train air quality assessment of the railway transit system in Beijing: A note, Transportation Research Part D., 12, 64–67.
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Abbaspour, M., Jafari, M.J., Mansouri, N. et al. Thermal comfort evaluation in Tehran metro using Relative Warmth Index. Int. J. Environ. Sci. Technol. 5, 297–304 (2008). https://doi.org/10.1007/BF03326024
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DOI: https://doi.org/10.1007/BF03326024