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Evaluation of Equivalent Temperature in a Vehicle Cabin with a Numerical Thermal Manikin (Part 1): Measurement of Equivalent Temperature in a Vehicle Cabin and Development of a Numerical Thermal Manikin
Technical Paper
2019-01-0697
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The present paper is Part 1 of two consecutive studies. Part 1 describes three subjects: definition of the equivalent temperature (teq), measurements of teq using a clothed thermal manikin in a vehicle cabin, and modeling of the clothed thermal manikin for teq simulation. After defining teq, a method for measuring teq with a clothed thermal manikin was examined. Two techniques were proposed in this study: the definition of “the total heat transfer coefficient between the skin surface and the environment in a standard environment (hcal)” based on the thermal insulation of clothing (Icl), and a method of measuring Icl in consideration of the area factor (fcl), which indicates the ratio of the clothing surface to the manikin surface area. Then, teq was measured in an actual vehicle cabin by the proposed method under two conditions: a summer cooling condition with solar radiation and a winter heating condition without solar radiation. The results showed that teq, including the effects of the air temperature, air velocity and thermal radiation, was measured properly. Subsequently, a numerical thermal manikin was developed. The geometry of the clothed manikin was modeled by 3D laser scanning. The procedure for evaluating teq using the numerical thermal manikin was defined, based on a heat exchange model in consideration of the fcl effect. The evaluation procedure can be applied to all manikin control modes described in ISO 14505-2, namely, a constant temperature mode, a constant heat flux mode and a comfort equation mode. Finally, the calculation accuracy obtained with the numerical thermal manikin was confirmed under a uniform environment. The results showed good agreement with the measured data. The numerical thermal manikin was used in a vehicle simulation in Part 2, and the simulation results were validated in comparison with the vehicle measurements made in the first part.
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Oi, H., Ozeki, Y., Suzuki, S., Ichikawa, Y. et al., "Evaluation of Equivalent Temperature in a Vehicle Cabin with a Numerical Thermal Manikin (Part 1): Measurement of Equivalent Temperature in a Vehicle Cabin and Development of a Numerical Thermal Manikin," SAE Technical Paper 2019-01-0697, 2019, https://doi.org/10.4271/2019-01-0697.Data Sets - Support Documents
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References
- ISO “ISO14505-2:2006 2006
- AIJ 2015
- Han , T. , Chen , K. , Khalighi , B. , Curran , A. et al. Assessment of Various Environmental Thermal Loads on Passenger Thermal Comfort SAE Int. J. Passeng. Cars - Mech. Syst. 3 1 830 841 2010 10.4271/2010-01-1205
- Chen , K. , Kaushik , S. , Han , T. , Ghosh , D. et al. Thermal Comfort Prediction and Validation in a Realistic Vehicle Thermal Environment SAE Technical Paper 2012-01-0645 2012 10.4271/2012-01-0645
- Hepokoski , M. , Curran , A. , and Schwenn , T. A Comparison of Physiology-Based Metrics to Environment-Based Metrics for Evaluating Thermal Comfort SAE Technical Paper 2013-01-0844 2013 10.4271/2013-01-0844
- Han , T. , Huang , L. , Kelly , S. , Huizenga , C. et al. Virtual Thermal Comfort Engineering SAE Technical Paper 2001-01-0588 2001 10.4271/2001-01-0588
- Ozeki , Y. , Takabayashi , T. , and Tanabe , S. Effects of Spectral Properties of Glass on Thermal Comfort of Car Occupants SAE Technical Paper 2003-01-1074 2003 10.4271/2003-01-1074
- Roy , D. , Petitjean , P. , and Clodic , D. Influence of Various Heat Transfers on Passenger Thermal Comfort SAE Technical Paper 2003-01-1075 2003 10.4271/2003-01-1075
- Nilsson , H.O. 2004 91-7045-703-4
- Han , T. and Huang , L. A Sensitivity Study of Occupant Thermal Comfort in a Cabin Using Virtual Thermal Comfort Engineering SAE Technical Paper 2005-01-1509 2005 10.4271/2005-01-1509
- Stancato , F. , Ferreira , T. , Araújo , G. , Cruz , D. et al. Aircraft Cabin Thermal Comfort Evaluation Using Numerical Manikins SAE Technical Paper 2006-01-2562 2006 10.4271/2006-01-2562
- Wolfe , N. , Mu , X. , Huang , L. , and Kadle , P. Cooling with Augmented Heated and Cooled Seats SAE Technical Paper 2007-01-1193 2007 10.4271/2007-01-1193
- Curran , A. , Peck , S. , Schwenn , T. , and Hepokoski , M. Improving Cabin Thermal Comfort by Controlling Equivalent Temperature SAE Int. J. Aerosp. 2 1 263 267 2010 10.4271/2009-01-3265
- Kaushik , S. , Han , T. , and Chen , K. Development of a Virtual Thermal Manikin to Predict Thermal Sensation in Automobiles SAE Technical Paper 2012-01-0315 2012 10.4271/2012-01-0315
- Stancato , F. , Conceicao , S. , Papa , R. , and Santos , L. CFD Thermal Comfort in Aircraft Cabin: A Comparative Study SAE Technical Paper 2015-01-2561 2015 10.4271/2015-01-2561
- Wyon , D. , Tennstedt , C. , Lundgren , I. , and Larsson , S. A New Method for the Detailed Assessment of Human Heat Balance in Vehicles-Volvo's Thermal Manikin, VOLTMAN SAE Technical Paper 850042 1985 10.4271/850042
- Wyon , D. , Larsson , S. , Forsgren , B. , and Lundgren , I. Standard Procedures for Assessing Vehicle Climate with a Thermal Manikin SAE Technical Paper 890049 1989 10.4271/890049
- Dufton , A.F. The Equivalent Temperature of a Warmed Room JIHVE (now the Journal of CIBSE) 4 227 229 1936
- Madsen , T.L. , Olesen , B.W. , and Read , K. New Methods for Evaluation of the Thermal Environment in Automotive Vehicles ASHRAE Transactions 92 1B 38 54 1986
- Foda , E. and Sirén , K. A Thermal Manikin with Human Thermoregulatory Control: Implementation and Validation International Journal of Biometeorology 2011 10.1007/s00484-011-0506-6
- Bohm , M. , Norén , O. , Holmér , I. , and Nilsson , H. 1999
- ASHRAE Chapter 8 Thermal Comfort ASHRAE Handbook of Fundamentals Atlanta American Society of Heating, Refrigerating and Air-Conditioning Engineers Inc. 2001