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Life Cycle Analysis to Estimate the CO2-Equivalent Emissions from MAC Operation

Interior Climate Control Vehicle OEM Committee
  • Ground Vehicle Standard
  • J2766_201908
  • Current
Published 2019-08-06 by SAE International in United States

This recommended best practice outlines a method for estimating CO2-equivalent emissions using life cycle analysis.

 
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Recommended Practice for an Engineering Analysis for A/C Efficiency Credits

Interior Climate Control Vehicle OEM Committee
  • Ground Vehicle Standard
  • J3174_201907
  • Current
Published 2019-07-18 by SAE International in United States

Under U.S. GHG and CAFE regulations, manufacturers are required to perform confirmatory testing to validate indirect air conditioning credits (refer to 40 CFR 86.1868-12). The purpose of this Reccomended Practice is to provide manufacturers with updated criteria for the 2020 and later model years.

 

Test Procedure for Internal Heat Exchangers of Mobile Air-Conditioning Systems with R-134a or R-1234yf Refrigerant

Interior Climate Control Vehicle OEM Committee
  • Ground Vehicle Standard
  • J3094_201902
  • Current
Published 2019-02-15 by SAE International in United States
The purpose of this SAE Standard is to define a common set of thermodynamic test conditions to evaluate internal heat exchangers for use with R-134a and R-1234yf refrigerants in mobile air-conditioning systems. This standard can be used to test actual vehicle IHX designs or standardized IHX samples, which can be used for comparison based on a common length and shape.
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Standard for Refrigerant Risk Analysis for Mobile Air Conditioning Systems

Interior Climate Control Vehicle OEM Committee
  • Ground Vehicle Standard
  • J2773_201702
  • Current
Published 2017-02-21 by SAE International in United States
This Standard describes methods to understand the risks associated with vehicle mobile air conditioning [MAC] systems in all aspects of a vehicle’s lifecycle including design, production, assembly, operation and end of life. Information for input to the risk assessment is provided in the Appendices of this document. This information should not be considered to be complete, but only a reference of some of the data needed for a complete analysis of the risk associated with the use of refrigerants in MAC systems.
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Recommended Best Practice for Climatic Wind Tunnel Correlation

Interior Climate Control Vehicle OEM Committee
  • Ground Vehicle Standard
  • J2777_201601
  • Current
Published 2016-01-14 by SAE International in United States
With many corporations and suppliers conducting development and validation tests at different Climatic Wind Tunnel sites, there is an increasing need for a recommended best practice that defines a process by which climatic wind tunnels can be correlated. This document addresses the test methods and metrics used to obtain similar results, independent of location, for Heating Ventilation and Air Conditioning (HVAC) and Powertrain Cooling (PTC) development. This document should be used as a guideline to make sure key aspects of tunnel testing are covered when comparing various climatic wind tunnel facilities. The depth of the correlation program is ultimately influenced by program objectives. Therefore a correlation program, for the intent and purposes of this document, can range from just a few tests to a full analysis that involves multiple vehicle tests identifying limitations and statistical boundaries. Using recommendations in this document will eliminate most of the items that effect facility mismatch in a correlation program.
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Mobile Air Conditioning System Refrigerant Emission Charts for R-134a and R-1234yf

Interior Climate Control Vehicle OEM Committee
  • Ground Vehicle Standard
  • J2727_201304
  • Current
Published 2013-04-02 by SAE International in United States
The “System Emissions Chart” contained herein is intended to serve as a means of estimating the annual refrigerant emission rate (grams per year) from new production A/C systems equipped with specified component technologies. It provides emission values for various component technologies that are currently available, and can be expanded as new technologies are commercialized. This document provides the information to develop an Excel file template “System Emissions Chart” for system emission analysis. The chart includes automotive compressor technologies for conventional mobile air conditioning systems as well as those using semi-hermetic compressors. This standard can be considered a companion document to SAE J2763 Test Procedure for Determining Refrigerant Emissions from Mobile Air Conditioning Systems. SAE J2727 estimates system emissions, taking into account production assembly variation and accounts for components that are 100% helium leak tested prior to vehicle final assembly. The results from SAE J2064 are used to better represent permeation emissions from different hose material and coupling configurations in this version. SAE J2763 may be used to quantify emissions from properly assembled systems.
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Safety Standards for Motor Vehicle Refrigerant Vapor Compression Systems

Interior Climate Control Vehicle OEM Committee
  • Ground Vehicle Standard
  • J639_201112
  • Current
Published 2011-12-19 by SAE International in United States
This SAE Standard applies to refrigerant vapor compression systems that provide cooling and/or heating for passenger cars, light trucks and commercial vehicles (on and off road) that use automotive type mobile air conditioning [MAC] systems. Large trucks, buses and other vehicles that do not use typical automotive a/c systems or use refrigerants not listed in this document are not covered by this standard. This standard covers any vehicle with a MAC system using a belt or electric motor driven compressor. This document provides standards for design, assembly, test and service of MAC systems to minimize environmental, health and safety impacts. Also included are cautionary statements for the service industry to alert technicians to the inadvisability and possible health or safety effects associated with venting refrigerant during service. It is not intended to restrict the use, or further development, of other types of refrigeration systems for mobile air conditioning applications. This document may be amended or additional safety standards created should other systems become practical. This document addresses only HFC-134a (R-134a), carbon dioxide (R-744), and HFO-1234yf…
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Vehicle Testing Requirements for Replacement Refrigerants for CFC-12 (R-12) Mobile Air-Conditioning Systems

Interior Climate Control Vehicle OEM Committee
  • Ground Vehicle Standard
  • J1659_201111
  • Current
Published 2011-11-21 by SAE International in United States
The purpose of this SAE Recommended Practice is to establish the specific criteria for the selection of a replacement refrigerant for mobile CFC-12 (R-12) air-conditioning (A/C) systems. This document provides guidelines for qualifying candidate refrigerant. The requirements include laboratory and field testing. The alternate refrigerant shall provide comparable system performance as CFC-12 (R-12) as defined herein. The vehicle testing shall be conducted on representative vehicle manufacturer’s product line, in which the refrigerant is intended to be used, such as cycling clutch orifice tube, constant run orifice tube, cycling clutch expansion valve, or continuous run expansion valve refrigerant system. This document is complete only when combined with the requirements of SAE J1657.
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Passenger Car Windshield Demisting and Defrosting Systems

Interior Climate Control Vehicle OEM Committee
  • Ground Vehicle Standard
  • J902_201108
  • Current
Published 2011-08-04 by SAE International in United States
This SAE Recommend Practice establishes for passenger cars, light trucks, and multipurpose vehicles with GVW of 4500 kg (10 000 lb) or less, as defined by EPA, and M1 category vehicles as defined by the European Commission: a Minimum performance standards for defrosting and demisting systems. b Test procedures that can be conducted on uniform test equipment by commercially available laboratory facilities.
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Passenger Car Backlight Defogging System

Interior Climate Control Vehicle OEM Committee
  • Ground Vehicle Standard
  • J953_201105
  • Current
Published 2011-05-26 by SAE International in United States
The scope of this SAE Recommended Practice is to establish uniform test procedures for passenger cars, to determine whether the system is defined as a defroster or defogger, and to establish minimum performance requirements for each system. A defroster for purposes of this practice is a system which will remove moisture and/or frost from the interior surface of the backlight at −18 °C. A defogger is a system which will remove moisture and/or fog from the interior surface of the backlight at 4 °C. The test procedure is intended to simulate actual conditions by utilizing either a cold room with an appropriate device to introduce air flow over the backlight or a sufficiently large wind tunnel with ambient temperature control. The test procedure and the minimum performance requirements are based on currently available engineering data.
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