This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Thermal Comfort Analysis for Passengers Inside a Vehicular Cabin
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 25, 2016 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
The theory related to the thermal comfort of a human being is described in this article. It is not technically and economically feasible to provide optimal thermal comfort to a human being. The air temperature inside the vehicles is inhomogeneous mainly due to the ventilation system and to solar heat flux. The thermal stratification of air that results in difference of heat flux at the human body may cause thermal discomfort. In this case, it is important to quantify the degree of discomfort, which can be represented by the Predicted Mean Vote and Predicted Percentage Dissatisfied indices.
This study intends to determine the thermal comfort for a human being inside vehicular cabins considering just the ventilation system with the same ambient temperature. A cabin of a vehicle is virtually reproduced in FLUENT® and the methodology of thermal comfort, based on previous works from the literature, is developed in Matlab 2010a and applied in this simulation.
The results show the parameters of thermal comfort on the vehicle’s occupants. The results shows that the thermal comfort is not exclusively a function of air temperature, but also of others parameters, such as mean radiant temperature, relative air velocity, air humidity, activity level and clothing thermal resistance. The sun and the time of the day promote local discomfort and reduce the thermal acceptability of the space. In addition, the thermal stratification caused by the sunlight and the ventilation system also cause thermal discomfort. This work demonstrates the thermal comfort methodology and the application on vehicular cabins, which can be used to design more robust air conditioning system.
|Technical Paper||Analysis of Factors Affecting Rainwater Ingestion into Vehicles HVAC Systems|
|Technical Paper||The Effect of Temperature on Pass-By Noise|
|Technical Paper||Design of Vehicle Air Conditioning Systems Using Heat Load Analysis|
CitationMagazoni, F., Buscariolo, F., Maruyama, F., Sales, F. et al., "Thermal Comfort Analysis for Passengers Inside a Vehicular Cabin," SAE Technical Paper 2016-36-0197, 2016, https://doi.org/10.4271/2016-36-0197.
Data Sets - Support Documents
|[Unnamed Dataset 1]|
- ASHRAE, ANSI/ASHRAE Standard 55: Thermal Environmental Conditions for Human Occupancy, 2004.
- BUSCARIOLO, F.F.; KARBON, K.J., Comparative CFD Analysis Between Rotating and Static Cases of Different Wheels Opening Designs over a Performance Sedan, SAE Paper, Nº 2011-36-0271, Society of Automotive Engineers, 2011.
- GIACONIA, C., ORIOLI, A., GANGI, A., A correlation linking the predicted mean vote and the mean thermal vote based on an investigation on the human thermal comfort in short-haul domestic flights, Applied Ergonomics, Vol. 48, 202-213, 2015.
- HOLOPAINEN, R., A human thermal model for improved thermal comfort, Doctor of Science, Aalto University, 2012.
- JETTÉ, M., SIDNEY, K., BLUMCHEN, G., Metabolic Equivalents (METS) in Exercise Testing, Exercise Prescription, and Evaluation of Functional Capacity, Clinical Cardiology, Vol. 13, 555-565, 1990.
- JONSSON, J., Including Solar Load in CFD Analysis of Temperature Distribution in a Car Passenger Compartment, Lulea University of Technology (Master of Science), 2007.
- NINGBAI, N., Analysis of Air flow Distribution and Thermal Comfort in Hybrid Electric Vehicles, Simon Fraser University (Master of Science), 2011.
- OLESEN, B. W., Technical Review No. 2: Thermal Comfort, Publisher: Bruel & Kjaer, 1982.
- OLESEN, B. W., A New Simpler Method for Estimating the Thermal insulation of a Clothing Ensemble, ASHRAE Transactions, Vol. 91, Part 2, 1985.
- ZHANG, H., ARENS, E., HUIZENGA, C., HAN, T., Thermal sensation and comfort models for non-uniform and transient environments, part I: Local sensation of individual body parts, Building and Environment, 2009.