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CO 2 Concentration in the Cabin in the Event of a Leak: CFD Simulation and Testing
Technical Paper
2017-01-1444
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
CO2 is an alternative to replace the conventional refrigerant (R134a) for the air-conditioning system, due to the high Global Warming Potential (GWP) of R134a. There are concerns with the use of CO2 as a refrigerant due to health risks associated with exposure to CO2, if the concentration of CO2 is over the acceptable threshold. For applications with CO2 as the refrigerant, the risk of CO2 exposure is increased due to the possibility of CO2 leakage into the cabin through the duct system; this CO2 is in addition to the CO2 generated from the respiration of the occupants. The initiation of the leak could be due to a crash event or a malfunction of the refrigerant system. In an automobile, where the interior cabin is a closed volume (with minimal venting), the increase in concentration can be detrimental to the customer but is hard to detect.
In this paper, the concentration of CO2 in the event of a leak is studied - Computational Fluid Dynamics (CFD) is used to simulate the concentration of CO2 in the cabin and the results are validated with experimental measurements. A transient simulation showing the increase in concentration of CO2 in the cabin is conducted as a preliminary demonstration of the usefulness of the CFD tool in cabin CO2 dispersion - the CFD model is able to accurately capture the trends and values of the CO2 concentration in the cabin as a function of time.
Authors
- Mitali Chakrabarti - Ford Motor Company
- Alfredo Perez Montiel - Ford Motor Company
- Israel Corrilo - Ford Motor Company
- Jing He - Ford Motor Company
- Angelo Patti - Ford Motor Company
- James Gebbie - Ford Motor Company
- Loren Lohmeyer - Ford Motor Company
- Bernd Dienhart - Ford Motor Company
- Klaus Schuermanns - Ford Motor Company
Citation
Chakrabarti, M., Perez Montiel, A., Corrilo, I., He, J. et al., "CO2 Concentration in the Cabin in the Event of a Leak: CFD Simulation and Testing," SAE Technical Paper 2017-01-1444, 2017, https://doi.org/10.4271/2017-01-1444.Also In
References
- http://www.cdc.gov/niosh/idlh/124389.html
- http://www.sae.org/misc/aaf99/visteon.pdf
- Mathur , G. Experimental Investigation to Determine Influence of Build-up of Cabin Carbon Dioxide Concentrations for Occupants Fatigue SAE Technical Paper 2016-01-0254 2016 10.4271/2016-01-0254
- Jung , H. Modeling CO2 Concentrations in Vehicle Cabin SAE Technical Paper 2013-01-1497 2013 10.4271/2013-01-1497
- Monforte , R. , Mattiello , F. , Perosino , A. , Porta , F. Validation of a CFD Model to Predict R-1234yf Concentrations in a Vehicle Cabin Compartment SAE Technical Paper 2016-01-0221 2016 10.4271/2016-01-0221