Saint Paul, MN

Energy Park Utility Company

Brownfield Redevelopment

SERVICES PROVIDED
Operations, maintenance, and management including construction engineering and design
Owner
Saint Paul Port Authority
Start-up
1980

Energy Park Utility Company (EPUC) serves the 218-acre Energy Park community in Saint Paul, MN. Home to manufacturers, commercial/office buildings, schools, health clinics, a hotel, and residential units, Energy Park is one of the nation’s first “Urban Villages.” Since 1980, EPUC has provided heating and cooling services to the majority of the buildings within Energy Park.

Built as a two-pipe system, recent system upgrades to four pipes allow customers to receive heating and cooling services throughout the year, improving the overall energy services and experience for customers while optimizing the efficiency of the district system. Construction included the installation of distribution lines, take-offs, the conversion of customers’ mechanical rooms to optimize system connections, and an expansion of the chilled water system.

Ever-Green Energy’s Role: Ever-Green serves as the system operation, maintenance, and management team. Our team also led the four-pipe conversion, including the completion of financing packages, extension of customer contracts, pre-construction engineering, distribution system design, construction oversight, and implementation and various plant and customer building improvements for enhanced efficiency.

Milestones:

  • 1980 system start-up
  • 1997 Ever-Green was selected to serve as the operations and management team.
  • 2014 construction completed on upgrade from two-pipe energy distribution system to four-pipe system, as well as expansion of the cooling system, including free cooling.

Technologies Implemented: Hot water district heating, district cooling, free cooling, PEX piping integration, year-round cooling, directional drilling of distribution system upgrades

ENERGY PARK HEATING SYSTEM DATA

 Buildings served  38 buildings
 Current billed demand  12.2 MW
 Total building area served  2.96 million square feet

 HEAT SOURCES

 Three gas/oil-fired boilers  11.92 MW
 Total:  11.92 MW
 Piping Materials  Pre-insulated steel and   PEX piping
 Diameter  3 inch to 10 inch
 Length  6 miles
 Volume  35,000 gallons
 Supply Temperature  150-180 degrees F
 Return Temperature  120 degrees F
 Supply Pressure  80 psi
 Reliability rate  99.990%

ENERGY PARK COOLING SYSTEM DATA

 Buildings served  25 buildings
 Current billed demand  12.2 MW
 Building area served  21 million square feet

 CHILLED WATER SOURCES

 Six electric chillers  4,640 tons
 Total:  4,640 tons
 Piping Materials  Insulated ductile iron  pipe
 Diameter  14 inch to 20 inch
 Length  6 miles
 Volume of distribution system  300,000 gallons
 Supply Temperature  43-50 degrees F
 Return Temperature  51-58 degrees F
 Supply Pressure  50 psi
 Minimum pressure differential  11 psi
 Reliability rate  99.990%

Work with Ever-Green

Call 651.290.2812 or email info@ever-greenenergy.com to chat with an Energy Systems Expert.