Internal Heat Exchanger Integration for a Dual Evaporator MAC System 2013-01-1504
The United States Environmental Protection Agency (EPA) as well as the European Commission (EC) are developing test procedures to regulate mobile air conditioning system (MAC) efficiency to reduce greenhouse gas emissions and reduce global warming. In the United States, air conditioning related MAC credits can be earned by implementing an internal heat exchanger (IHX) into a MAC system. By integrating an IHX into a MAC system the, Coefficient of Performance (COP) can be increased at the same time increasing cooling capacity. This improvement in efficiency reduces the energy and/or fuel consumption of the MAC system.
This paper will compare various IHX plumbing configurations for a dual evaporator system with R1234yf refrigerant. A MAC system optimized for efficiency as well as evaporator cooling capacity is used to assess these different IHX plumbing configurations. Factors that will be considered include IHX heat transfer rate, suction pressure drop, and the impact of these factors on the COP and cooling capacity. The optimal IHX plumbing configuration for this dual evaporator system will be identified and its integration into the vehicle discussed. This paper also describes the MAC system, test facility used and the testing procedure applied.
Citation: Seybold, L., Hill, W., and Lazaridis, I., "Internal Heat Exchanger Integration for a Dual Evaporator MAC System," SAE Int. J. Mater. Manf. 6(3):549-566, 2013, https://doi.org/10.4271/2013-01-1504. Download Citation
Author(s):
Lothar Seybold, William Hill, Ioannis Lazaridis
Affiliated:
GM Europe - Adam Opel AG Engineering, Macrae LLC
Pages: 18
Event:
SAE 2013 World Congress & Exhibition
ISSN:
1946-3979
e-ISSN:
1946-3987
Also in:
SAE International Journal of Materials and Manufacturing-V122-5EJ, SAE International Journal of Materials and Manufacturing-V122-5
Related Topics:
Environmental protection
Greenhouse gas emissions
Heat exchangers
Air conditioning
Heat transfer
Test procedures
Fuel consumption
Test facilities
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