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Development of a Tool for Estimating the Life Cycle Climate Performance of MAC Systems
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 02, 2019 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Climate change is a global issue affecting every industry. Automotive companies have been working to address this issue by reducing the greenhouse gas emissions of their vehicles. EPA has encouraged this by providing incentives in the Greenhouse Gas Emissions Rule of 2009. Improving the efficiency of MACs (mobile air conditioning systems) is part of this effort. Life-cycle climate performance (LCCP) is a comprehensive metric for estimating the greenhouse gases emissions produced by the construction, operation, and end-of-life recycling of a vehicle MAC (Mobile Air Conditioning) system. Many companies and organizations have conducted LCCP for their vehicles using various software tools. The IMAC-GHG-LCCP (Improved Mobile Air Conditioning related to Green-House-Gas LCCP) model is a new comprehensive software tool that follows a similar approach as the current automotive LCCP modeling standard, GREEN-MAC-LCCP ([Global Refrigerants Energy & Environmental Mobile Air Condition LCCP), but with a focus on simplicity and ease-of-use. The tool has added support for water plumbing, multiple evaporators and chillers, electric compressors and user-defined refrigerants. Vehicle usage data for each city including vehicle lifetime, driving distance, and driving duration are open for user edit. Inputs to the software include refrigerant leakage data, MACs capacity and power consumption data, vehicle component mass data, fan data, updated weather data, and drive cycle data to calculate the indirect and direct CO2-equivalent emissions for a given vehicle in each selected city. Curve fits of the cooling capacity and power consumption are used to estimate the performance of the MAC at a range of different engine/vehicle speeds and ambient conditions. The emissions of the vehicle at each time step of the selected drive cycle are calculated. A results report provides the calculated direct and indirect emissions for each city. A model example estimating the effects of improving the efficiency of the MAC system on the direct and indirect emissions of a vehicle is presented.
CitationRhoads, A. and Hill, W., "Development of a Tool for Estimating the Life Cycle Climate Performance of MAC Systems," SAE Technical Paper 2019-01-0611, 2019, https://doi.org/10.4271/2019-01-0611.
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- ISO 14040, “Environmental Management - Life Cycle Assessment - Principles and Framework,” 2006.
- Sumantran, V., Khalighi, B., Saka, K., General Motors R&D Center, Steve Fischer, Oak Ridge National Laboratory, “An Assessment of Alternative Refrigerants for Automotive Applications based on Environmental Impact,” presented at SAE Meeting, June 28, 1999.
- Fischer, S.K. and Sand, J.R., “Total Environmental Warming Impact (TEWI) Calculations for Alternative Automotive Air-Conditioning Systems,” SAE Technical Paper 970526, 1997, doi:10.4271/970526.
- Zhang, M., Muehlbauer, J., Aute, V., and Radermacher, R., “Life Cycle Climate Performance Model for Residential Heat Pump Systems,” AHRTI Report No. 09003-01, 2011.
- Papasavva, S., “Reducing the Risk of Global Warming from CFC Alternatives: A Scientific Basis for Policy Options,” Ph.D. thesis, Tufts University, 1997.
- Clodic, D., “Research Study on the Definition of the Implementation of a Method of Measurement of Annual Leak Flow Rates (LFRs) of MAC Systems,” Jan. 2006.
- Hill, W. and Papasavva, S., “General Motors Corp, Life Cycle Analysis Framework; A Comparison of HFC-134a, HFC-134a Enhanced, HFC-152a, R744, R744 Enhanced, and R290 Automotive Refrigerant Systems,” SAE Technical Paper 2005-01-1511, 2005, doi:10.4271/2005-01-1511.
- Papasavva, S. and Moomaw, W.R., “Life Cycle Analysis of CFC-11, CFC-12, HFC-134a and HCFC- 123,” J. of Industrial Ecology, 1998.
- Krieger, T.M., Bateman, D.J., Sylvester, R.W., “Life Cycle Analysis for Production of HFC-134a and HFC-152a,” Paper presented at the Mobile Air Conditioning Summit, April 2004, http://www.epa.gov/cppd/2004MACSummit.pdf.
- Boustead Model 5.0, http://www.bousteadconsulting.co.uk.
- Johnson, V.H., “Fuel Used for Vehicle Air Conditioning: A State-by-State Thermal Comfort-Based Approach,” SAE Technical Paper 2002-01-1957, 2002, doi:10.4271/2002-01-1957.
- Papasavva, S. and Moomaw, W., “Life Cycle Global Warming of CFCs and CFC-substitutes for Refrigeration,” Journal of Industrial Ecology University, 1998.
- Yin, J.M., Pettersen, J., McEnaney, R., and Beaver, A., “TEWI Comparison of R744 and R134a Systems for Mobile Air Conditioning,” SAE Technical Paper 1999-01-0582, 1999, doi:10.4271/1999-01-0582.
- Petitjean, C., Guyonvarch, G., Benyahia, M., and Beauvis, R., “TEWI Analysis for Different Automotive Air Conditioning Systems,” SAE Technical Paper 2000-01-1561, 2000, doi:10.4271/2000-01-1561.
- Papasavva, S. and Papasavva, S., “Comparison of GREEN-MAC-LCCP© based Indirect CO2-eq. Emissions from MACs and Vehicle Measured Data,” SAE Technical Paper 2010-01-1208, 2010, doi:10.4271/2010-01-1208.
- Monforte, R. and Mandrile, M., “Effects on Real Life Fuel Efficiency of Raising the MAC Engagement Temperature,” SAE Int. J. Passeng. Cars - Mech. Syst 6(2):1021-1029, 2013, doi:10.4271/2013-01-1506.
- Society of Automotive Engineers, “Mobile Air Conditioning System Refrigerant Emission Charts for R-134a and R-1234yf,” SAE Standard J2727, 2013.
- Society of Automotive Engineers, “Procedure for Measuring System COP [Coefficient of Performance] of a Mobile Air Conditioning System on a Test Bench,” SAE Standard J2765, 2017.
- Society of Automotive Engineers, “Life Cycle Analysis to Estimate the CO2-Equivalent Emissions from MAC Operation,” SAE Standard J2766, 2009.