District Energy St. Paul
Progress since the early 1980s...
• System operates at double the efficiency of the former steam district heating system;
• Serves more than twice the building area as the steam system did in 1983 using the same amount of fuel;
• Customer energy consumption reduced an average of 20% by converting to district heating, upgrading internal systems and practicing energy conservation;
• Sulfur dioxide and particulate emissions reduced by 75% per unit of end-use energy;
• Carbon dioxide emissions reduced 50% per end-use Btu;
• 116 million gallons of groundwater saved annually.
District Cooling St. Paul
Progress since the early 1990s...
• Eliminated the use of chlorofluorocarbon (CFC) refrigerants in customer buildings (CFCs are the primary factor in the destruction of the Earth's ozone layer);
• Eliminated one-time use of groundwater to cool customer buildings;
• Decreased peak electricity demand by making chilled water at night when power demands are lower;
• Decreased electricity consumption in customer buildings.
Combined Heat and Power
Progress since the early 2000s...
• Reduced sulfur dioxide and particulate emissions, which contribute to acid rain;
• Reduced carbon dioxide emissions, the main factor in global warming, by 280,000 tons per year;
• Simultaneously produces heat and electricity;
• Operates at more than twice the efficiency of conventional electric plants;
• Consumes approximately 280,000 tons of wood waste annually, greatly reducing the amount that is now burned in open fires or disposed of in other ways;
• Reduced District Energy's use of oil and coal by 70%;
• Supplies 25 megawatts of electricity to the local power grid, offsetting production at coal-fired power plants.
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