Challenges and Potential Solutions for Reducing Climate Control Loads in Conventional and Hybrid Vehicles

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The National Renewable Energy Laboratory, a U.S. Department of Energy national laboratory, is collaborating with U.S. automotive manufacturers to develop innovative techniques to reduce national fuel consumption and vehicle tailpipe emissions by reducing vehicle climate control loads. A new U.S. emissions test, the Supplemental Federal Test Procedure (SFTP), will soon begin measuring tailpipe emissions with the air conditioning system operating. Modeled results show that emissions of oxides of nitrogen (NOx) and carbon monoxide (CO) more than double during the air conditioning part of the SFTP. Reducing the transmittance of the glazing can have a greater impact on the cabin soak ... continued below

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Farrington, R.B., Anderson, R., Blake, D.M., Burch, S.D. & Cuddy, M.R., Keyser, M.A., Rugh, J.P. January 1, 1999.

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The National Renewable Energy Laboratory, a U.S. Department of Energy national laboratory, is collaborating with U.S. automotive manufacturers to develop innovative techniques to reduce national fuel consumption and vehicle tailpipe emissions by reducing vehicle climate control loads. A new U.S. emissions test, the Supplemental Federal Test Procedure (SFTP), will soon begin measuring tailpipe emissions with the air conditioning system operating. Modeled results show that emissions of oxides of nitrogen (NOx) and carbon monoxide (CO) more than double during the air conditioning part of the SFTP. Reducing the transmittance of the glazing can have a greater impact on the cabin soak temperature than ventilating the vehicle during a hot soak. Reducing the amount of outside air can decrease cooling and heating loads but requires that the recirculated air be cleaned. We discuss a photocatalytic oxidation air-cleaning process for removing volatile organic compounds and bioareosols. We conclude with an example of modeling the thermal comfort of the occupants. An auxiliary load increase of only 400 Watts (W) results in a 0.4 km/L (1 mpg) decrease for a conventional 11.9-L/100-km (28-mpg) vehicle. If every vehicle in the United States were to save only 0.4 km/L (1 mpg), $4 billion (U.S. dollars) would be saved annually in gasoline and oil costs. Further information can be found at http://www.ctts.nrel.gov/auxload.html.

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OSTI as DE00003528

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  • Challenges and Potential Solutions for Reducing Climate Control Loads in Conventional and Hybrid Vehicles, Conference location not supplied, Conference dates not supplied

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  • Other: DE00003528
  • Report No.: NREL/CP-540-25975
  • Report No.: ON: DE00003528
  • Grant Number: AC36-83CH10093
  • Office of Scientific & Technical Information Report Number: 3528
  • Archival Resource Key: ark:/67531/metadc682510

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  • January 1, 1999

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  • July 25, 2015, 2:20 a.m.

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  • March 31, 2016, 9:28 p.m.

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Farrington, R.B., Anderson, R., Blake, D.M., Burch, S.D. & Cuddy, M.R., Keyser, M.A., Rugh, J.P. Challenges and Potential Solutions for Reducing Climate Control Loads in Conventional and Hybrid Vehicles, article, January 1, 1999; Golden, Colorado. (digital.library.unt.edu/ark:/67531/metadc682510/: accessed September 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.