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Cabin Heat Transfer and Air Conditioning Capacity
Technical Paper
2001-01-0284
ISSN: 0148-7191, e-ISSN: 2688-3627
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Sector:
Event:
SAE 2001 World Congress
Language:
English
Abstract
This paper describes a first order differential equation that relates the cabin heat transfer coefficient, discharge panel temperature and discharge volumetric air flow to the average interior temperature. The solution to this equation leads to an overall understanding of automotive air conditioning designs and tests. Use of this solution in transient form can provide a relationship between interior temperature changes vs. time during a typical cool down or idle test. Use of this solution in steady state form provides the same under highway speed test conditions. Most importantly, this solution provides a means to determine experimentally the overall heat transfer coefficient of any vehicle body style with different type of insulation materials. It is otherwise quite impossible to accomplish due to the complicated automotive body designs. Once the overall heat transfer coefficient is thus determined, it becomes a link between the demand from the air side and the supply from the refrigerant-side. The use of this methodology is four folds. First, the capacity of refrigerant-side (sizing of components) can be determined based on the demand from the air side (functional objectives). Secondly, the actual A/C performance of an existing system can be evaluated from the components that are already in use by employing this method in reverse. Unless the performance of certain components is increased, repetitive testing does not improve system outcome. It bears some very significant economic considerations. Thirdly, this method also leads the establishment of unified validation procedures and requirements to various components. Lastly, an integrated approach can be developed to enhance computer simulation in both velocity and thermal fields.
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Authors
Citation
Ding, Y. and Zito, R., "Cabin Heat Transfer and Air Conditioning Capacity," SAE Technical Paper 2001-01-0284, 2001, https://doi.org/10.4271/2001-01-0284.Also In
References
- Atkinson, W. 2000 Designing mobile air-conditioning systems to provide occupant comfort SAE Paper 2000-01-1273
- Black, W.Z. Hartley, J.G. 1985 Thermodynamics Harper & Row New York NY
- Currle, J. 1997 Numerical simulation of the flow in a passenger compartment and evaluation of the thermal comfort of the occupants SAE Paper 970529
- Gaveau, O. Clodic, D. 1998 Test bench for measuring the energy consumption of an automotive air conditioning system SAE Paper 980291
- Huang, D.C. Oker, E. Yang, S.L. Arici, O. A dynamic computer-aided engineering model for automotive climate control system simulation and application Part II: Passenger compartment simulation and applications SAE Paper 1999-01-1196
- Incropera, F.P. Dewitt, D.P. 1981 Fundamentals of Heat Transfer John Wiley & Sons New York, NY
- Kargilis, A. 1995 Design and Development of Automotive Air Conditioning Systems University Consortium for continuing education Ann Arbor, MI
- Khamsi, Y. Petitjean, C. 2000 Validation results of automotive passenger compartment and its air conditioning system modeling SAE Paper 2000-01-0982
- Kojima, K. Itoh, S. Ohtaki, H. Watanuki, K. 1999 An estimate of temperature in a passenger compartment by numerical simulation using the linear graph theory SAE Paper 1999-01-1188
- Lee, J.G. Sioshansi, M. 1994 Automotive climate control in passenger compartment with external thermal irradiation SAE Paper 940602
- Lendeburg, M.R. 1990 Mechanical Engineering Reference Manual 8th Edition Professional Publication, Inc. Belmont, CA
- Stefurak, G. Hutchinson, B. Gerber, A. 1996 Using the Hemi-Cube method to simulate automotive heating and cooling including solar and thermal radiation SAE Paper 960691