30 May 2005

SUMMARY OF ADVANCED SUPERMARKET R&D ACTIVITIES CONDUCTED UNDER INTERNATIONAL ENERGY AGENCY (IEA) ANNEX 26


Present supermarket refrigeration systems require very large refrigerant charges for their operation
and an individual store system can consume as much 1-1.5 million kWh annually. Several new
approaches, such as distributed, secondary loop, low-charge multiplex, and advanced self-contained
refrigeration systems, are available that utilize significantly less refrigerant. Analyses show that if
properly designed and implemented, these advanced systems can reduce annual energy consumption by
over 10% and total equivalent warming impact (TEWI) by as much as 60%. Integration of refrigeration
and store HVAC operation is also possible through use of heat pumps. Integrating the refrigeration and
HVAC functions in this manner can potentially reduce combined operating costs by over 10%.