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TCAAP Energy Integration Resiliency Framework Energy Source Implementation 49 Estimated Annual Carbon Dioxide Emission Reductions for Low-Temperature District Energy Gas Furnace - Heating 15,874 MMBtu/yr 929 tons C02/yr Air conditioner - Cooling 836 MMBtu/yr 128 tons C02/yr Total Conventional Emissions 1,057 tons C02/yr Heat Pump - Heating 3562 MMBtu/yr 544 tons C02/yr Heat Pump - Cooling 484 MMBtu/yr 74 tons C02/yr Pumping Station (kWh) 247,280 MMBtu/yr 129 tons C02/yr Total Heat Pump Loop Emissions 747 tons C02/yr Savings 310 tons C02/yr % Emissions Reduction 29% Table 16: Estimated annual carbon dioxide emissions reduction This calculation does not take into account the opportunities for carbon-neutral electricity production that would be available to the TCAAP development. These calculations use the base emissions rate from the electric grid, published by Xcel Energy for the Upper Midwest service territory. As the local electricity sources become less dependent on the primary grid, through implementation of community solar gardens or other technologies, the carbon dioxide emissions could be further reduced. 3.3.4. Financial Analysis The initial cost of the low-temperature district energy system was estimated based on the Project Team’s historical data for installation of piping and equipment. The pumping station, heat pumps, furnaces, and air conditioning units were estimated based on major equipment budgetary pricing that is readily available from manufacturers. The distribution piping was estimated based on historical data for similar material installations in Minnesota. The low-temperature of the water allows for flexibility of the piping system construction. The Project Team evaluated the material costs for a number of materials and based the estimate on a high-density polyethylene piping system, due to the material cost and ease of installation. A summary of the initial capital costs are provided in Table 17.