refrigeration design technologies

Refrigeration Design Technologies

• An independent, family-owned company with a commitment to quality and customer service

• 45 years of refrigeration experience• Quality design that utilizes only the best industry

components• Responsive engineering and quotation departments to

efficiently meet your needs

CustomersCustomers

Consultants

Robert Rippe & AssociatesMinneapolis, MN

Cini-Little International Germantown, MD New York, NYHollywood, CA

JEM AssociatesPleasantville, NJLas Vegas, NV

Schwartz Schwartz & Associates (SSA)Tampa, FLFt. Lauderdale, FL

Ricca Newmark DesignDenver, CO

Clevenger, Frable, LaValleeWhite Plains, NY

Romano GatlandLindenhurst, NY

Futch Design AssociatesBaton Rouge, LA

Systems Design International (SDI)Greenwood Village, CO

Camacho AssociatesAtlanta, GA

Advanced Foodservice SolutionsMountville, PA

Food StrategyPotomac, MD

Giampietro AssociatesDeer Park, NY

Rush Design AssociatesMontgomery, AL

Orness Design GroupSan Diego, CA

Inman Foodservices GroupMiami, FL

• Multiple roof curbs required

• Electrician must provide service to each individual system

• Service and installation requires re-location between various systems

• Single roof curb required

• Factory-wired control panel allows for single point connection by the electrician

• Convenient access to all compressors at a centralized location

Individual Units

RDT Rack System

vs.

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)

Product Line

Types of Compressors

HermeticScroll

Semi-Hermetic

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

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

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

Scroll Design

• Radial compliance• 3 moving parts• Quiet operation

The Refrigeration Cycle

Maximum Versatility…all of this on only two compressors

Digital Scroll Compressor

• Simple, Variable Modulation for Precise Temperature Control

• Highly Flexible Load Matching, from 10-100%

• Reduced Power and Energy Consumption

• Can Be Applied to Multiple Evaporator Systems

• Reduced Compressor Cycling

• Linear Power Reduction Relative to Modulated Capacity

Digital Scroll Modulation – How It WorksDigital Scroll Modulation – How It Works

Simple, Variable Modulation for Precise Temperature Control

• Precise set point accuracy ensures reduced frequency of compressor cycling

• Reduced compressor cycling = reduced energy consumption

Digital Scroll Reduced CyclingDigital Scroll Reduced Cycling

System CyclingReduced By 73%

Low Temperature Compressor Cycling / Hr

0

1

2

3

4

Comp 1 Comp 2 Comp 3 Digital 1 Comp 2 Comp 3

Cyc

les

/ Hr

Before Digital Scroll3/15/06 - 6/15/06

After Digital Scroll6/19/06 - 7/24/06

Rack Avg = 1.5 Cycles / Hr

Rack Avg = 1.0 Cycles / Hr32% Reduction

Medium Temperature Compressor Cycling / Hr

0

5

10

15

Comp 1 Comp 2 Comp 3 Digital 1 Comp 2 Comp 3

Cyc

les

/ Hr

Before Digital Scroll3/15/06 - 6/15/06

After Digital Scroll6/19/06 - 7/24/06

Rack Avg = 7.1 Cycles / Hr

RackAvg = 1.3 Cycles / Hr

82% Reduction

Linear Power Reduction Relative to Modulated CapacityDigital Scroll Compressor

• 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

Controller / Communication

Procedure for Changing Over to Emergency Compressor

Reduced Copper Piping / Reduced Installation Costs

Conventional Piping: Requires Each Compressor toHave Individual Line Sets

Eco-Cool Piping: One Line Set for Medium Temp One Line Set for Low Temp

Conventional Refrigeration RackConventional Refrigeration Rack

• Average power consumptionAverage power consumption

• No alarm systemNo alarm system

• No communication systemNo communication system

• Larger rack size to accommodate multiple compressorsLarger rack size to accommodate multiple compressors

• No redundancyNo redundancy

• Limited versatilityLimited versatility

• Set point accuracy +/- 6°FSet point accuracy +/- 6°F

• Higher installation costsHigher installation costs

• Increased energy efficiency (by 40%)Increased energy efficiency (by 40%)

• Communication system with alarm and reportingCommunication system with alarm and reporting

• Smaller rack size / fewer compressorsSmaller rack size / fewer compressors

• 100% redundancy100% redundancy

• Maximum versatility: numerous fixtures on one compressorMaximum versatility: numerous fixtures on one compressor

• Set point accuracy of +/- 0.5°FSet point accuracy of +/- 0.5°F

• Lower installation costsLower installation costs

Eco-Cool Refrigeration SystemEco-Cool Refrigeration System

The new Informant by RDT is a multifunctional monitoring system and data logger that communicates through machine to machine cell technology, SMS text messaging.

Features:

• Temperature Alarm• Refrigerant Leak Detection• Humidity Sensors• Door Position Sensors• Lighting Control• Amperage Monitor• Data Logging

No Internet or landline telephone connection needed. Four temperature probes are included.

Free LoggingKnow temperature and alarm history with logging. The unit automatically sends highest, lowest and current temperature to a Cloud server. See history on spreadsheet or graphs. No special software required - open a web page and get the history.

Simple Installation Wall mount the control box. Run the temp sensors into the spaces to be monitored. Send a test message. Easy. Add sensors for door position or other contact (on/off) devices.

Product Safety HAACP Compliant - Reporting Temperature - Monitoring and Logging Door Ajar Monitoring and Logging Wireless Logging City Power Monitoring

Defrosts Only When Needed, Eliminating Unnecessary Defrost Cycles Reduced Energy Usage and Shortened Recovery Cycles More Consistent Freezer Temperatures Extended Equipment LifeAverage Annual Energy Savings = $1050Average Annual Energy Savings = $1050

Date

Current Low High

AlarmsTemp Temp Temp

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 -7F  

2012-01-02 04:37:01PM (Mon) -8F -9F 12F  

2012-01-02 03:36:37PM (Mon) -8F -9F -7F  

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  

HAACP Compliant Reports Detailed Logs Graphical Data

4 Timed Defrost Cycles Per DayTi

med

D

efro

stO

n-D

eman

d D

efro

st

On-Demand Defrost Cycle

Defrost Comparison: Timed Defrost vs. Eco-Smart On-Demand Defrost

Refrigeration Design Technologies