Carrier Refrigeration

4 Time Temperature Energy-Saving Software and Temperature Control Cargo Temperature Tolerance Compressor stops and fans switch to low speed Compressor starts and fans switch to high speed Pulldown Period Energy Savings Energy Savings Container Air Temperature Setpoint Energy Savings Cargo Temperature ContainerLINE May 2019 | Efficiency This is a general example showing how energy-saving software modulates temperature while protecting cargo quality. Performance will vary based on cargo, setpoint, ambient temperature, refrigeration unit and software being used. 2020 Foresight cont'd "Since a PrimeLINE ® unit is already optimized for efficiency, it will benefit less from a software boost than a ThinLINE ® unit, which provides greater opportunity for savings," Taeckens said. "So, for example, QUEST software, when used for certain perishables, may produce energy savings of up to 30 percent for a PrimeLINE unit, and for a ThinLINE unit, the savings will be up to 50 percent. In both cases, the savings are substantial, and to be clear, the overall energy consumption will still be lower for the more efficient PrimeLINE unit than the ThinLINE unit." It should be noted that with all three options, when carrying a perishable cargo, evaporator fans will cycle from high to low speed at intervals over a voyage. In contrast to Carrier Transicold units, some competitive power-saving modes primarily derive energy savings by continuously running fans in low speed throughout a voyage. This technique cannot assure uniform distribution of cool air within a container filled with high-respiring, heat-loading perishables, meaning "hot spots" can occur, potentially compromising quality of perishable cargo. Consult with the Experts "Many variables can come into play when managing temperatures for perishables shipped in containers," said Eduardo Kerbel, Ph.D., postharvest technology business manager, Global Container Refrigeration, Carrier Transicold. "For example the type of fruit, its physiology, condition and quality, the season in which it was harvested and the length of travel time are all important considerations. "The degree of precooling and the type of packaging used can also affect the way cargo will respond to temperature variances that can occur with power-saving techniques," Kerbel said. "For produce to achieve its maximum transit-life potential, shipping lines should collaborate closely with the exporters they serve in selecting the right temperature management mode for the commodity being shipped." With 2020 just ahead, now is a great time to talk to the experts at Carrier Transicold to determine which power-saving mode is best for your applications and your equipment, enabling the protection of cargo quality, while lowering operating costs and reducing emissions. w

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