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Refrigeration Design Technologies


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Presented by Gary Crocker at the Restaurant Energy Education Forum on 1-13-12

Published in: Business, Technology
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Refrigeration Design Technologies

  1. 1. Refrigeration Design Technologies
  2. 2. • An ind e p e nd e nt, fam ily-owne d com p any with a com m itm e nt to quality and c us tomer s ervice• 45 ye ars of re frige ration e xp e rie nce• Q u ality d e s ign th at u tilize s only th e b e s t ind u s try com p one nts• R e s p ons ive e ngine e ring and q u otation d e p artm e nts to e fficie ntly m e e t you r ne e d s
  3. 3. CustomersCustomers
  4. 4. ConsultantsRobert Rippe & Associates Cini-Little International JEM Associates Schwartz SchwartzMinneapolis, MN Germantown, MD Pleasantville, NJ & Associates (SSA) New York, NY Las Vegas, NV Tampa, FL Hollywood, CA Ft. Lauderdale, FLRicca Newmark Design Clevenger, Frable, LaVallee Romano Gatland Futch Design AssociatesDenver, CO White Plains, NY Lindenhurst, NY Baton Rouge, LASystems Design Camacho Associates Advanced Foodservice Food StrategyInternational (SDI) Atlanta, GA Solutions Potomac, MDGreenwood Village, CO Mountville, PAGiampietro Associates Rush Design Associates Orness Design Group Inman Foodservices GroupDeer Park, NY Montgomery, AL San Diego, CA Miami, FL
  5. 5. RDT Rack System Individual Units• Multiple roof curbs required • Single roof curb required• Electrician must provide service to • Factory-wired control panel allows foreach individual system vs. single point connection by the electrician• Service and installation requires re- • Convenient access to all compressors at alocation between various systems centralized location
  6. 6. Remote Refrigeration Applications• Walk in Coolers/Freezers• Under Counter Refrigerated Bases• Drop-In Cold Pans• Reach-In Coolers/Freezers• Blast Chillers• Air Screen Merchandisers• Deli Cases• Ice Maker (condenser circuits)
  7. 7. Product Line
  8. 8. Types of Compressors ScrollSemi-Hermetic Hermetic
  9. 9. Semi-Hermetic • Years of proven reliability • Accessible – parts can be repaired and replaced • Sight glass allows oil level visibility • Cast iron body efficiently dissipates heat • Heavy • Most expensive
  10. 10. Hermetic • More common in fractional applications (1/4 – 3/4 HP) • Utilized with refrigerated bases, cold pans, etc. • No oil level visibility • Non-accessible • Least expensive
  11. 11. Scroll• Efficient, quiet and durable• Compliance: scroll members separate in the presence of liquid or debris• Sight glass allows oil level visibility• Non-accessible• Low failure rate• Less weight• Low to moderate expense
  12. 12. Scroll Design • Radial compliance • 3 moving parts • Quiet operation
  13. 13. The Refrigeration Cycle
  14. 14. Maximum Versatility …all of this on only two compressors
  15. 15. Digital Scroll Compressor• Simple, Variable Modulation for PreciseTemperature Control• Highly Flexible Load Matching,from 10-100%• Reduced Power and EnergyConsumption• Can Be Applied to Multiple EvaporatorSystems• Reduced Compressor Cycling• Linear Power Reduction Relative toModulated Capacity
  16. 16. Digital Scroll Modulation – How It Works
  17. 17. Simple, Variable Modulation for Precise Temperature Control • Precise set point accuracy ensures reduced frequency of compressor cycling • Reduced compressor cycling = reduced energy consumption
  18. 18. Digital Scroll Reduced Cycling 4 Low Temperature Compressor Cycling / Hr Rack Avg = 1.5 Cycles / HrCycles / Hr 3 32% Reduction Rack Avg = 1.0 Cycles / Hr 2 1 0 Comp 1 Comp 2 Comp 3 Digital 1 Comp 2 Comp 3 Before Digital Scroll After Digital Scroll 3/15/06 - 6/15/06 6/19/06 - 7/24/06 15 Medium Temperature Compressor Cycling / Hr Rack Avg = 7.1 Cycles / HrCycles / Hr 10 82% Reduction 5 RackAvg = 1.3 Cycles / Hr 0 Comp 1 Comp 2 Comp 3 Digital 1 Comp 2 Comp 3 Before Digital Scroll System Cycling After Digital Scroll 3/15/06 - 6/15/06 6/19/06 - 7/24/06 Reduced By 73%
  19. 19. Digital Scroll CompressorLinear Power Reduction Relative to Modulated Capacity
  20. 20. Controller / Communication • E2 Controls compressor sequencing and automatically minimizes number of running compressors for energy savings • Electronic control of defrost cycles (no thermostat required) • Monitors and alarms on temperature rise, low oil levels and refrigerant leaks • Upon alarm, sends alert via phone call, text message or e-mail
  21. 21. Procedure for Changing Over to Emergency Compressor
  22. 22. Reduced Copper Piping / Reduced Installation CostsConventional Piping: Eco-Cool Piping:Requires Each Compressor to One Line Set for Medium TempHave Individual Line Sets One Line Set for Low Temp
  23. 23. Conventional Refrigeration Rack• Average power consumption• No alarm system• No communication system• Larger rack size to accommodate multiple compressors• No redundancy• Limited versatility• Set point accuracy +/- 6°F• Higher installation costs
  24. 24. Eco-Cool Refrigeration System• Increased energy efficiency (by 40%)• Communication system with alarm and reporting• Smaller rack size / fewer compressors• 100% redundancy• Maximum versatility: numerous fixtures on one compressor• Set point accuracy of +/- 0.5°F• Lower installation costs
  25. 25. T h e n e w In f o r m a n t b y R D T is am u l t if u n c t io n a l m o n it o r in g s y s t e m a n dd a t a l o g g e r t h a t c o m m u n ic a t e s t h r o u g hm a c h in e t o m a c h in e c e l l t e c h n o l o g y , S M St e x t m e s s a g in g .Fe a t u r e s :• Temperature Alarm• Refrigerant Leak Detection• Humidity Sensors• Door Position Sensors• Lighting Control• Amperage Monitor• Data LoggingN o In t e r n e t o r l a n d l in e t e l e p h o n ec o n n e c t io n n e e d e d . F o u r t e m p e r a t u r ep r o b e s a r e in c l u d e d .Free LoggingK n o w t e m p e r a t u r e a n d a l a r m h is t o r yw it h l o g g in g . T h e u n it a u t o m a t ic a l l ys e n d s h ig h e s t , l o w e s t a n d c u r r e n tt e m p e r a t u r e t o a Cl o u d s e r v e r .S e eh is t o r y o n s p r e a d s h e e t o r g r a p h s . N os p e c ia l s o f t w a r e r e q u ir e d - o p e n a w e bp a g e a n d g e t t h e h is t o r y .Simple InstallationWa l l m o u n t t h e c o n t r o l b o x . Ru n t h e t e m ps e n s o r s in t o t h e s p a c e s t o b e m o n it o r e d .S e n d a t e s t m e s s a g e . E a s y . Ad d s e n s o r sf o r d o o r p o s it io n o r o t h e r c o n t a c t(o n /o f f )d e v ic e s .
  26. 26.  P rod u ct S afe ty  D e fros ts O nly Wh e n N e e d e d , E lim inating H AAC P C om p liant U nne ce s s ary D e fros t C ycle s - R e p orting Te m p e ratu re  R e d u ce d E ne rgy U s age and - M onitoring and Logging S h orte ne d R e cove ry C ycle s D oor Aj M onitoring and Logging ar  M ore C ons is te nt F re e ze r Te m p e ratu re s Wire le s s Logging  E xte nd e d E qu ip m e nt Life C ity P owe r M onitoring Average Annual Energy Savings = $1050
  27. 27. Current Low High Date Temp Temp Temp Alarms 2012-01-02 11:39:56PM (Mon) -7F -9F -7F 2012-01-02 10:39:31PM (Mon) -7F -9F 12F 2012-01-02 09:39:07PM (Mon) -8F -9F -7F 2012-01-02 08:38:43PM (Mon) -8F -9F -7F 2012-01-02 07:38:18PM (Mon) -9F -9F -7F 2012-01-02 06:37:49PM (Mon) -7F -9F -7F 2012-01-02 05:37:25PM (Mon) -8F -9F -7FH AAC P C om p liant R e p orts 2012-01-02 04:37:01PM (Mon) -8F -9F 12F D e taile d Logs 2012-01-02 03:36:37PM (Mon) -8F -9F -7F G rap h ical D ata 2012-01-02 02:35:38PM (Mon) -8F -9F -7F 2012-01-02 01:35:14PM (Mon) -7F -9F -7F 2012-01-02 12:34:49PM (Mon) -8F -9F -7F 2012-01-02 11:34:25AM (Mon) -8F -8F -4F
  28. 28. Timed Defros t D efrost Com parison: Tim ed D efrost vs. Eco-Sm art On-D em and D efrost 4 Timed Defros t C ycles Per Day Defros tOn-Demand On-Demand Defros t C ycle
  29. 29. Refrigeration Design Technologies