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e-Thermal: A Vehicle-Level HVAC/PTC Simulation Tool
Technical Paper
2004-01-1510
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper describes a vehicle-level simulation model for climate control and powertrain cooling developed and currently utilized at GM. The tool was developed in response to GM's need to speed vehicle development for HVAC and powertrain cooling to meet world-class program execution timing (18 to 24 month vehicle development cycles). At the same time the simulation tool had to complement GM's strategy to move additional engineering responsibility to its HVAC suppliers. This simulation tool called “e-Thermal” was quickly developed and currently is in widespread (global) use across GM. This paper describes GM's objectives and requirements for developing e-Thermal. The structure of the tool and the capabilities of the simulation tool modules (refrigeration, front end airflow, passenger compartment, engine, transmission, Interior air handling …) is introduced. Model data requirements and GM's strategy for acquiring component data are also described. The paper includes an example of a typical application of the tool with sample output from the simulation and some comparison to actual test data from a vehicle under the same test scenario.
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Authors
Topic
Citation
Tumas, T., Maniam, B., Mahajan, M., Anand, G. et al., "e-Thermal: A Vehicle-Level HVAC/PTC Simulation Tool," SAE Technical Paper 2004-01-1510, 2004, https://doi.org/10.4271/2004-01-1510.Also In
Heat Exchangers and Their Simulation, Thermal Management, and Fundamental Advances in Thermal and Fluid Sciences
Number: SP-1818; Published: 2004-03-08
Number: SP-1818; Published: 2004-03-08
References
- Alkidas, Alex, C. “Generalized Heat Rejection Correlations for Spark Ignition Engines” GM Internal Report May 1992
- Alkidas, Alex C. Mandrusiak, Gary D. “A Thermal Model of a Vehicle Powertrain” GM Internal Report May 1996
- Gatowski, Jan “Estimation of Piston Sump Side Heat Transfer Coefficients using a Test Rig” GM Internal Report May 1994
- General Motors HVAC/PTC Component Data Standards (CDS)