1. WELCOME

2. Glycol Refrigeration A most basic definition of refrigeration is taking heat from someplace we don’t want it and moving it to someplace where it doesn’t matter

3. Parallel Rack Design Goal A Parallel Rack attempts at any moment of operation to match as closely as possible the amount of electricity being consumed to the amount of work (BTU load) being presented.

4. Parallel Rack Two or more compressors Compressors share one refrigerant circuit Computerized controller Remote condenser (integrated in updraft rack) Scroll compressors (Digital, Fixed)

5. Parallel Rack Top View

6. Emerson E2 Rack Controller

7. Parallel Glycol Chiller Plate-To-Plate Fluid Heat Exchanger with Electric Expansion Valve Glycol/Water Reservoir (65/35) Expansion Tank Air Bleed Valve Two Circulating Pumps, VFD Control (Lead)

8. Plate-To-Plate Heat Exchanger

9. Parallel Glycol Chiller EEV allows Full Floating Discharge Pressure This allows ambient sub-cooling, reduces discharge pressure and compression ratio, lowers compressor motor amp draw, decreases compressor run time by increasing evaporator efficiency 2013 NRA Kitchen Innovation Award Winner

10. Parallel Glycol Chiller Chilling fluid (18F) circulates to all air coils or cold walls in walk-in coolers, medium temperature fixtures Fluid-cooled remote condensing units at or near low temperature fixtures and walk-ins Same fluid circulated through fluid cooled condensers on self-contained equipment such as ice machines, post mix machines, frozen beverage dispensers Pre-chilling of ice machine supply water to increase hot weather production

11. Glycol Piping Loop

12. Balancing Valve, at fixture inlet, controls flow rate of fluid GPM (gallons per minute) Fluid Solenoid, at fixture outlet to control temperature Fluid cooled heat exchanger for self- contained fixtures to replace fan and air condenser coil Fixture Hardware

13. Fixture Hardware Balancing Valve

14. Fixture Hardware Fluid Solenoid Valve

15. Tube-In-Tube Heat Exchanger

16. Parallel Glycol Chiller System Benefits Greatly reduced refrigerant charge Reduced electric consumption from parallel design and Full Floating Discharge Pressure Removal of heat-of-rejection from store space, decreased AC load, savings in run time, possible capacity reduction One condenser to be cleaned and maintained located outdoors Lower installation material cost, ABS plastic vs. copper, long line runs possible for distant rack placement

17. All MT fixtures gang defrost, no individual time clocks at fixtures required, remote LT fixtures defrost via local time clock or Master Controller Reverse Cycle Defrost 2.0 if walk-in freezer Each MT fixture's temperature can be managed by E2 Rack Controller with sensor and control wire pair installation E2 provides full remote access for monitoring and alarming as option Parallel Glycol Chiller System Benefits

18. Parallel Glycol Chiller Applications Replace city water operated equipment High rise building or urban location with rack distant from fixtures Basement or poorly vented kitchens where heat buildup increases self-contained equipment operating cost and and prevents proper product temperatures Hotel ice machines LEED projects Soft serve ice cream and yogurt shops with multiple production machines