Longos Walkers Line

Innovative refrigeration microgrid powered by 130kW CHP system that also provides free heating and cooling and significant carbon savings.

CCHP and CO2 refrigeration system result in significant GHG reductions

The project implemented a sophisticated CCHP system as the backbone of a power and thermal microgrid, configured with dual-mode controls for an automatic transition between grid-connected and standalone operation in the event of a power interruption. The system’s two C65 microturbines produce electricity while the exhaust is channeled to integrated heat recovery modules to provide hot water. The exhaust is also used by an 80-ton absorption chiller to provide on-site chilled water which complements the CO2 system to ensure its operation in sub-critical mode all throughout the year. Because different environmental temperatures create different needs, the systems adapt seasonally. 

During the summer months, the CHP hot water output is used by a make-up air unit to provide dehumidification, while the absorption chiller provides chilled water to the CO2 racks to precool the system and improves refrigeration system efficiency. In the winter, however, the CHP hot water is used to provide heating for the building reducing natural gas consumption for heating, while the CO2 refrigeration racks get precooling from the cold outside air. 

  • Client:
  • Longo’s
  • Industry:
  • Food and Beverage
  • Location:
  • Burlington, Ontario
  • System Size:
  • Two C65 (130kW)
  • Operating Mode:
  • Dual Mode
  • Controls:
  • Dual Mode MTIM
  • Commissioning Date:
  • 2022


130 kW

Chilled Water

80 tons

Yearly Output

1,100+ MWh

Energy Savings

$130,000 per year

Hot Water

860,000 BTU/hr