US search for alternative refrigerants

Categories for consdieration include air-conditioners, heat pumps, dehumidifiers, chillers, water heaters, ice makers, and refrigeration equipment.

The Low GWP Alternative Refrigerants Evaluation Program (Low GWP AREP) is desired by the industry to assess the research needs, accelerate industry’s response to environmental challenges raised by the use of high GWP refrigerants, and avoid duplicative work. AHRI managed the original R-22 AREP in the 1990s, and will again take a leadership role in coordinating and managing this industry-driven research effort along with industry experts from AHRI member companies.

“The intent of the program is to help industry select the most promising refrigerants, understand technical challenges, and identify the research needed to use these refrigerants,” said AHRI Vice President of Regulatory and Research Karim Amrane. “The program will not prioritize these alternatives; rather, it will identify potential refrigerants replacements for high GWP HFCs, and present the performance of these replacements in a consistent and standard manner.”

The program will consist of:

• compressor calorimeter testing
• system drop-in testing
• soft-optimized system testing
• heat transfer testing

All tests other than heat transfer coefficient measurements are expected to be performed at participating companies’ laboratories, using their own resources and at their own expense. Participating companies will include U.S. and international manufacturers. The heat transfer coefficient measurements will be contracted out on a competitive basis to universities and private research laboratories.

The GWP AREP program will be managed by a technical committee, which will be responsible for developing detailed test protocols prior to the start of the program, prioritizing tasks if refrigerant samples have limited availability, and ensuring quality of the results to be published. The technical committee will report to the AHRI Executive Committee. Once the technical committee is formed, an open solicitation will be made to both U.S. and foreign manufacturers to participate in the testing program. AHRI expects to begin testing new low GWP alternative refrigerants in July 2011.