Drake Landing Solar Community: Okotoks  Vision.

Energy Award

The Energy Centre  

The 230 m2 (2,500 square foot) Energy Centre building for the Drake Landing Solar Community (DLSC) is the heart of the district heating system. Located in the corner of the community park, it houses the short-term heat storage tanks and most of the mechanical equipment such as pumps, heat exchangers, and controls. The solar collector loop, the district heating loop, and the borehole thermal energy storage loop pass through the Energy Centre.

Approximately 70 percent of the floor space is filled with two large, horizontal, insulated water tanks, each 3.8m (12 feet) in diameter and 11.4m (38 feet) long. The water temperatures within these tanks are stratified to improve the overall efficiency of the system.

The front room of the Energy Centre contains the pumps, valves, heat exchangers, expansion tanks, and other equipment necessary to operate and control the energy system.

Stratified Short Term Thermal Storage (STTS) Tanks and Solar Collector Loop
Stratified Short-Term Thermal Storage (STTS) Tanks and Solar Collector Loop


  • 2 – 120 m3 (32,000 US gallons) steel tanks.
  • Epoxy lined for 100°C water.
  • Horizontal baffle to encourage stratification and plug flow through upper and lower chambers.
  • The storage medium is water.