Visteon Corporation has demonstrated two test vehicles at the 2006 SAE Automotive Alternate Refrigerant Systems Symposium in Scottsdale, Arizona.

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The location seems ideal for showing off a/c units – Scottsdale was forecast to hit 40C on Monday, according to weatherbug.com.


One demonstration vehicle used natural refrigerant R744 and the other featured the alternative low global warming potential refrigerant Fluid H.


That vehicle was developed by Visteon and its affiliate Halla Climate Control in conjunction with Hyundai.


Visteon’s R744 system demonstrated production-ready component hardware using carbon dioxide instead of the R134a refrigerant found in today’s systems.

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R744 systems run at higher pressures but are more efficient under most conditions. The system can achieve up to a 20% reduction of incremental fuel consumption for air conditioner operation.


Visteon claims its R744 climate systems are a potential solution to meet upcoming European and worldwide legislation on greenhouse gases.


“Visteon is recognised as a leader in R744 development, and we continue to investigate further solutions for potential advance refrigerants,” said the supplier’s climate group head Joy Greenway.


“Our objective is to deliver the most efficient and reliable solution to meet current and future environmental legislation regarding automotive refrigerants.”