How Can Refrigeration

Architecture Help Improve

Operating Efficiencies?

Newark, N.J., August 24, 2016

Howell Feig National Sales ManagerAHT Cooling Systems USA

Market and Regulatory Changes

The full circle of natural refrigeration

• EPA: January 2020 GWP< 2,500

• CARB: January 2020 GWP<150

The Recent Evolution of R-290

• AHT as a leader began exploring natural

refrigerants for self-contained in the 1990s

• Began serial production with R-290 in

early 2000s

• More than 500,000 installations globally

• Thousands of installs all over North

America

• Many other manufacturers online in recent

years, with others to follow

Why R-290 Makes Sense

• Lowest TEWI (total equivalent warming impact)

• Factors: GWP direct and indirect

Sample Energy Comparison

Open multi-deck type Run length (ft) BTUH/ft Annual kWhAnnual energy cost

(based on $0.15/kWh)

Remote 60 1,575 59,341 $8,901.15

Remote 60 1,702 64,127 $9,619.05

Plug-in with water loop 60 315.2 48,545 $7,281.75

All models are based on open front (without doors).

BTUH/FT are from case spec sheets.

Remote cases are based on evap 26 °F.

Plug-ins are based on evap 23 °F.

18% – 25%

savings

Southern California Edison Energy Test Comparison

R-404A case Propane case

Control Parameters

Average Room DB Temp (°F) 75.2 75.2

Average Room DP Temp (°F) 58.6 58.6

Test Duration and Compressor Run Time (Hours)

Test Duration 24.0 24.0

Compressor Run Time 15.3 20.8

Power (W)

Compressor 505.3 285.5

Lighting 37.0 36.9

Total (W) 542.3 322.4

Energy (kWh)

Compressor 7.7 5.9

Lighting 0.9 0.9

Total 8.6 6.8

Temperatures

Interior Case Temperature (°F) 11.0 10.4

Average Product Temperatures (°F) 1.3 1.0

20% savings

Sample Energy Cost Comparison

Narrow Island: Remote 12 ft Self-Contained 10 ft 13 ft R-290

Annual kWh 7,640 10,741 4,672

Annual kWh/ LN ft 636.7 1,074.1 359.4

Annual Cost / LN ft $95.51 $161.12 $53.91

Based on ice cream setting, using spec sheet data and AHRI EER -20 for incumbents with 404A using $0.15/kWh

48%+

savings

System Design Flexibility

• Only requires a plug

• Some cases may need an aisle drain or connection to evac. system

• Some cases can be tied to water loop

Case Options

Beverage and prepackage food cases

Case Options

Spot bunkers and modular islands

Case Options

Reach-in / multi-decks

Case Options

Frozen doors

Case Options

Semi-vertical modular islands

Case Options

Service cases

Case Options

Foodservice islands

Case Options

Walk-ins

Complete R-290 Design

Walk-ins

with doors

Complete R-290 Design

Walk-in

Complete R-290 Design

Frozen doors

Service cases

Complete R-290 Design

Walk-ins

Frozen doors

Service cases

Heat Removal: Water Brine Loop to Dry Cooler

Plug-in multidecks with

integrated cooling circuit

(only two interfaces: power supply and

defrost water drain)

Optional heat removal via water

pipes on the multidecks

Plug-in deep freezers

(require only power supply)

Optional external plug-in unit

for heat removal (for “warm“ stores; contains no

refrigerant or compressors)

Optional Heat Reclaim

Monitor

• Sends priority alarms

• Allows online analysis/diagnosis

• Change temp online

• Additional components allow energy monitoring

Maintenance

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• Similar to 404A / 134A systems

• Well-ventilated area

• Propane detector

• Commercial grade, not residential (i.e., camping, grill)

• Quick and easy certification through RSES

The Flexible, Eco-friendly Store Design

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Questions?

DISCLAIMER

Although all statements and information contained herein are believed to be accurate and reliable, they are presented without guarantee or warranty of any kind, expressed or

implied. Information provided herein does not relieve the user from the responsibility of carrying out its own tests and experiments, and the user assumes all risks and liability for

use of the information and results obtained. Statements or suggestions concerning the use of materials and processes are made without representation or warranty that any such

use is free of patent infringement and are not recommendations to infringe on any patents. The user should not assume that all toxicity data and safety measures are indicated

herein or that other measures may not be required.

Thank You!

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