co2 systems in supermarkt

8/10/2019 Co2 Systems in Supermarkt

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CO SupermarketSystem

Case Study of a WarmClimate CO Booster

System


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Case Study of a WarmClimate CO Booster System

A Sprouts Farmers Market Storeand the Advansor CO2 BoosterSystem Installed There- Elimination of HFCs and Reduce the Carbon

Footprint- Energy Comparison With the Customers

Traditional R407A System for That Location- The Ad iabat ic Cond enser appl ied to th e

sys tem

Topics:


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Google and the Google logo are registered trademarks of Google Inc., used with permission

Sprouts Farmers Market


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Advansor System


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Standard Advansor System


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Adiabatic Gas Cooler

Operated Dry in Cooler Weather Operated With Wet Adiabatic Pads toPre Cool the Air in Warmer Weather

Baltimore Aircoil Company, used with permission


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Adiabatic Gas CoolerAt Sprouts


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Analysis was performed by Emerson using Emersons model based on inputs from Hillphoenix.


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Analysis was performed by Emerson using Emersons model based on inputs from Hillphoenix.


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BAC Adiabatic Gas Cooler


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Sprouts Future Study


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A Case Study of the CO 2System at Whole Foods

Market.


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Owners Expectations

Project Delivery Method

System Schematic

Comparative System Cost

Comparative Energy Use

Lessons Learned

Future Development

Agenda


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Owners Expectations Refrigerant Reduction (GreenChill Partner)

Low Energy Consumption

Advancing Natural Refrigerant Technology

Minimal Change Orders

(no surprises)Stable System Operation


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Project Delivery Method


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Mixed-Use Mid-Rise

Closed Loop Fluid Cooler

Racks and HVAC Heat Pump Loop

High Side 407A

Med-Temp CO 2 overfeed

Low-Temp CO 2 DX

System Schematic


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System Schematic


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System Schematic


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System Schematic


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System Schematic


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Equipment (BTUs equalized)Cascade CO 2/407A: baseline 100LT DX / MT Glycol: 93%(4) DX Distributed Units: 112%

Fluid Cooler/pumps excluded from CO2 & Glycol stores.Plate Hx condensers included.

Hybrid condensers excluded from Distributed. Distributed does include insulated enclosures.

Installation (actual stores)Cascade CO 2/407A: baseline 100LT DX / MT Glycol: 95%(4) DX Distributed Units: 80%

System Cost


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Refrigerant Charge

December January February March April

0

200

400

600

800

1,000

1,200

1,400

1,600

1,800

CO2/407A DX LT / Glycol MT Distributed Units

R e f r i g e r a n t C h a r g e (

l b s )

Individual Refrigeration Systems

Whole Foods Market Individual Store Refrigerant Charge

C O 2

4 0 7 A

4 0 7 A

4 0 7 A


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Store System Sq Feet MBH Description

CAS CascadeCO2 33,030 735 CO2/407A cascade, closed loop heat pumpfluid cooler system

OCN LT DX / MT

Glycol 26,632 731

Med Temp Glycol and 407A Low Temp DX,closed loop heat pump fluid cooler system

FRE Distributed 39,026 847 (4) Distributed 407A units, hybrid

condensers

Energy Use


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Refrigeration Energy Use

December January February March April0

2,500

5,000

7,500

10,00012,500

15,000

17,500

20,000

22,500

25,000

27,500

30,000

32,500

35,000

37,500

40,000

42,500

45,000

47,500

50,000


R e f r i g e r a t i o n S y s t e m E l e c t r i c a

l U s a g e

( k W

h )

Monthly Store Usage

Whole Foods MarketRefrigeration Electrical Usage Comparison:

Cascade CO2 vs. DX / Glycol

CO2/407A 407A Glyco Pump


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Refrigeration Energy Use

0

2,500

5,000

7,500

10,00012,500

15,000

17,500

20,000

22,500

25,000

27,500

30,00032,500

35,000

37,500

40,000

42,500

45,000

47,500

50,000


R e f r i g e r a t i o n S y s t e m E l e c t r i c a l U

s a g e

( k W

h )

Monthly Store Usage

Whole Foods Market

Refrigeration System's Electrical Usage Comparison



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Whole Store Energy Use

0

20,000

40,000

60,000

80,000

100,000

120,000

140,000

160,000

180,000


M a i n E l e c t r i c a l F e e

d ( k W

h )

Monthly Store Usage

Whole Foods Market

Monthly Store Main Feed Usage (kWh)



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Controls collaboration is key

VFD application offers significant benefits

CxA, EOR, OEMs, and contractors all worktogether

High grade CO 2 not immediately available

(stocking on-site, bottle disposition)Training of Service Technicians

Anticipated energy penalty does not apply

Overall experience has been good

Lessons Learned


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Continued focus on Natural Refrigerantsolutions

Transcritical CO 2

Subcritical/cascade CO 2

AmmoniaPropane

Both energy and refrigerant reduction are

very high priorities for Whole Foods.

Future Development


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A Case Study of the CO 2 System at Whole FoodsMarket, Castro
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co2 systems in supermarkt

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