Carbon Dioxide (CO2) Reversible Heat Pump System

This Small Business Innovation Research Phase II project is to design, model and demonstrate the feasibility of, a reversible CO2 heat pump system, including an advanced compressor design, which meets military requirements for a 3-ton capacityEnvironmental Control Unit. The CO2 system will utilize state-of-the-art system components and computer modeling plus a novel compressor, capable of both variable displacement and compression ratio, to operate more efficiently and provide a wider range ofoperating conditions for heating and cooling than possible with existing HCFC systems, with HFC systems of the future or with current experimental CO2 systems.Successful completion of Phase II will permit fabrication and testing of manufacturing prototypeEnvironmental Control Units for the military and prototype heat pumps for commercial markets. Successful introduction of CO2 refrigerants into commercial heat pumps is expected to increase the range of operating conditions over which heat pumps willoperate, greatly reduce life-cycle costs of such units and eliminate the environmental burden associated with synthetic refrigerants.