1. A&P Fresh Market with UTC Power PureComfortTM 240M
Jim Kirk
Director of Engineering
The Great Atlantic & Pacific Tea Co.

2. Project Team Facility: 57,000 Sqft A&P Supermarket, Mt. Kisco, NY
Project Sponsors:
UTC Power
DOE/
Oak Ridge National Laboratory
Utility:
Con Edison

3. PureComfortTM 240M for A&P
“Pre-Assembled” Integrated System:
Skid Mounted
kW microturbines
Gas Compressors
Carrier Double Effect Absorption Chiller
Cooling Tower
Chilled Water Pumping System
Provides 240 kW* of Electricity at 480v and 110 tons of Chilled water (95F day) or 900 MBTU Hot water (32F day)
* 240 kW is Gross Power at 59 F, Net Power is 228 kW at 59 F

4. PureComfortTM 240M Skid Chiller Exhaust / Desiccant Connection
Chilled Water Connections
Electrical Panels / Pump Controls
60’
Microturbines
Chiller
12’ 6”
Gas Compressors
Chilled Water Pump Station
Cooling Tower
Exhaust Manifold

5. Exhaust Diverter Valve
PureComfortTM 240M
Exhaust Diverter Valve
Chiller Enclosure
Gas Compressors
Exhaust Duct
Cooling Tower
Microturbines

6. System Integration System Provides: 240* kW of Electricity
- Grid Parallel
- Grid Dependant
- Base Load
Chilled Water:
- Space Cooling
- Refrigerant Sub-Cooling
Desiccant Regeneration:
- Direct Exhaust Heat
Hot Water:
- Winter Operation
- Space Heating
* 240 kW is Gross Power at 59 F, Net Power is 228 kW at 59 F

7. System Integration (Heat Recovery)

8. System Integration (Electrical)

9. System Integration (EMS Controls)
Microturbines, Chiller & Cooling Tower are controlled Via On-Board Controls
Chilled Water Pumps, Bypass Valves & Desiccant Wheel are Controlled Via Building / Refrigeration EMS System (Danfoss AKC-55)
Danfoss System controls Bypass Valve via two algorithms (Summer & Winter). A Manual Switch is used change from Summer to Winter Mode of Operation
Sub-cooler solenoid valves are “always on” in Summer Operation
Danfoss System Provides “Chiller Run” Input Only
Heating, Cooling & Desiccant have “redundant” Systems

10. System Installation (Roof Top)
Chilled Water Supply / Return Refrigeration Sub-Cooling
Pre-Fabricated Refrigeration Penthouse
Water Coil
Desiccant Exhaust Manifold
Munters HVAC
PureComfort 240

11. System Installation (Roof Top)
Refrigeration Condensers
Desiccant Duct
Munters HVAC
Chilled Water Pipes to Refrigeration Sub-Coolers
Screening
Pure Comfort System

12. System Installation Challenges Site Required a Roof Top Installation
Weight of System Required Additional Steel Support
Location / Pre-Fabricated Weight Required 600 ton Crane to Install
Pre-Fabricated Size Of System Required Special Permitting for Delivery (Over Width & Over Height)
Mechanical / Electrical Engineers not Familiar with Technology
Utility not Familiar with Technology

13. System Installation Benefits of Pre-Fabrication
Quality Control – Assembled in Controlled Environment
Simplified Installation: Seven Point Connection
Chilled Water Supply & Return
400 amp 480v
High Natural Gas (5 PSI)
Make up water
Tower / Chiller Drain
Exhaust Duct to Desiccant
Phone Line
Less Design Required by Local Project M/E Engineers
Very Accurate Documentation for Utility Interconnection Applications
Faster Start-up & Commissioning

14. System Installation (Costs)
UTC PureComfortTM 240M $500K*
Coil In Munters Unit $8K
Steel $55K
Crane $37K
Electrical $27K
Plumbing $50K
Desiccant Ducting $8K
GC Management $14K
Total: $699K
$2,900/kWe Installed
* Pre DOE Funding

15. System Installation (Costs)
What Could We Do Better Next Time?
Put It On The Ground! Remove Redundant Systems!
Cost
UTC PureComfortTM 240M $475K*
Coil In Munters Unit $8K
Removing Redundant Mechanical Systems (Munters) - $25K
Steel $55K
Crane $37K
Electrical $18K
Plumbing $50K
Desiccant Ducting $28K
GC Management $10K
Total: $564K
$2,350/kWe Installed
* Pre DOE Funding

16. System Inst. (Utility Interconnection)
Was Not an Issue!
Turbines are NY State Type Tested and Approved for Interconnection
NY State Law Forces Utilities to accept Standard Type Tested Interconnection
Hardest Part was Getting to “the Right Person” within the Utility and “Educating” them about the System.
Overall Application and Approval Process was very Simple
Did Not Cause Any Delay or Additional Expense for Project

17. System Installation (Commissioning)
A Problem Develops:
Turbines will not automatically re-start in “multi – pack mode”
Turbine Software found to be the problem
Software has to be NY State Approved
Delayed System Interconnection test three weeks
That Was the Only Real Problem!!

18. What’s the Bottom Line? Reduced Energy Costs! Great PR!
Estimated Annual Avoided Energy Loads & Cost
Quantity
% of Annual Baseline – Energy
Annual Cost Savings [$]*
Grid Electricity
54%
$44,000
Refrigeration Compression
10%
$10,000
Space Cooling Compression
70%
$45,000
Desiccant Regeneration
50%
$9,000
Space Heating
75%
$21,000
Total
$129,000
Gas = $0.69/therm & Grid Electric at $.13 kWh
*Maintenance costs not included

19. Things To Consider: Local Utility Costs (Can you do it cheaper?)
Can You Use The Chilled Water?
Is High Pressure Gas Available?
Local Interconnection Regulations?
State Law?
Local Utility Control?
What are The Requirements?
Can You Get It There? (Permit Issue)

20. Would We Do It Again?
Yes!

21. For More Information: Jim Kirk 470 Chestnut Ridge Road Tom Coulbourn
Woodcliff Lake, NJ 07677
(201)
Tom Coulbourn
2300 Westmoreland Street
Richmond, VA 23230
(804)