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Impact of Different Types of Glazing on Thermal Comfort of Vehicle Occupants
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 14, 2020 by SAE International in United States
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Due to intense peak summer temperatures and sunny summers in tropical countries like India etc., achieving the required thermal comfort of car occupants without compromising on fuel efficiency is becoming increasingly challenging. The major source of heat load on vehicle is Solar Load. Therefore, a study has been conducted to evaluate the heat load on vehicle cabin due to solar radiations and its impact on vehicle air-conditioning system performance with various combinations of door glasses and windscreen. The glasses used for this study are classified as green, dark green, dark gray, standard PVB (Polyvinyl Butyral) windscreen and PVB windscreen having infrared cut particles. For each glass, part level evaluation was done to find out the percentage transmittance of light of different wavelengths and heat flux through each glass. To verify the effectiveness of each glass, vehicle level air-conditioning system performance test was done in All Weather Chassis Dyno Facility for each retrofitted vehicle. To eliminate the effect of manufacturing variance while evaluating each retrofitted vehicle, only door glasses and windscreen were changed in the same vehicle keeping all other testing conditions such as ambient temperature, incident solar radiations, humidity and vehicle running pattern the same. The performance of each retrofitted vehicle was evaluated on the basis of its-soaking temperature, soaking time, grill temperature, and nose level temperature. On comparing the results of each configuration, the best door glass and windscreen configuration is proposed to improve the thermal comfort of the vehicle occupants.
CitationBhateja, A., "Impact of Different Types of Glazing on Thermal Comfort of Vehicle Occupants," SAE Technical Paper 2020-01-1249, 2020, https://doi.org/10.4271/2020-01-1249.
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- Regulation No 43 of the Economic Commission for Europe of the United Nations (UN/ECE) - Uniform provisions concerning the approval of safety glazing materials and their installation on vehicles.
- Federal Motor Vehicle Safety Standard 205 - Glazing Materials
- Bureau of Indian Standards IS 2553-2 Safety Glass, Part 2: For Road transport.
- Central Motor Vehicle Rules, 1989 India.
- Narita, C., Tanabe, S., Ozeki, Y., Konishi, M., Ono, M., and Sato, K. , “Subjective Experiments on the Effects of Spectral Property of Solar Radiation on Thermal Comfort,” in Indoor Air 99 Proceedings, 1999, 1, 614-619.