6030 Marshalee Dr., Suite 111, Elkridge, MD 21075
Ph: 443.393.2313 Fax:443.393.0267

Historical Timeline of CO2

1. 1850 Alexander Twining, Yale Professor, introduces the use of CO2 as a refrigerant.
2. 1867 Thaddeus S.C. Lowe designs first Ice Machine using CO2 refrigerant.
3. 1881 Charles Von Linde develops first European CO2 system.
4. 1889 J&E Hall, a British company, builds the first CO2 cascade system.
5. 1928 Frigidaire is issued first patent for CFCs.
6. 1932 Carrier Engineering Corporation introduces the "Atmospheric Cabinet", the worlds first self-contrained air conditioner.
7. 1960 CO2 has disappeared from the market due to technical problems due to high pressure operation compared to chemical company backed "wonder fluids" know as CFCs.
8. 1987 The Montreal Protocol addresses the harmful effects of CFCs on our environment. The protocol focuses on phasing out use of these harmful chemicals.
9. 1989 Gustav Lorentzen (Norway) rediscovers CO2 as a refrigerant. He is credited with developing the modern transcritical cycle.
10. 1992 Lorentzen and Petterson publish their experimental results of their transcritical installation.
11. 2009 Formation of EcoClimate Services LLC.
12. 2010 HCFC based systems are no longer available for new installations. US federal regulations enact minimum standards for insulated structures used as walk-in coolers and freezers.
13. 2015 Coca-Cola commits to this date for CO2 based vending machine.

Central Refrigerant
Parallel piped compressors with intelligent controls

• Central Refrigerant can be used for walk-in coolers, freezers, reach-in units, HVAC coils, etc.
• Compressors are incrementally energized to meet current load demands
• Inherent Redundancy with multi-compressor design
• Ad-hoc compressor circuit expansion capabiliy

   Central Refrigerant Diagram

Mass flow controls for precise heat exchange conditions

• Stepper motor valves are used for dynamic control of the evaporator pressure and temperature differential
• Dry vapor point is moved from the evaporator coil to the suction header
• Ad-hoc evaporator installation with Central Refrigerant System
• Available for conventional and natural refrigerants (conditions apply)

   Electronically Controlled Evaporator

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