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04-13-15-R
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04-13-15-R
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4/13/2015 1:58:39 PM
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TCAAP Energy Integration Resiliency Framework <br />Energy Source Implementation <br /> <br /> <br /> 49 <br />Estimated Annual Carbon Dioxide Emission Reductions for Low-Temperature District Energy <br />Gas Furnace - Heating 15,874 MMBtu/yr 929 tons C02/yr <br />Air conditioner - Cooling 836 MMBtu/yr 128 tons C02/yr <br />Total Conventional Emissions 1,057 tons C02/yr <br /> <br />Heat Pump - Heating 3562 MMBtu/yr 544 tons C02/yr <br />Heat Pump - Cooling 484 MMBtu/yr 74 tons C02/yr <br />Pumping Station (kWh) 247,280 MMBtu/yr 129 tons C02/yr <br />Total Heat Pump Loop Emissions 747 tons C02/yr <br /> <br />Savings 310 tons C02/yr <br />% Emissions Reduction 29% <br />Table 16: Estimated annual carbon dioxide emissions reduction <br />This calculation does not take into account the opportunities for carbon-neutral electricity production <br />that would be available to the TCAAP development. These calculations use the base emissions rate <br />from the electric grid, published by Xcel Energy for the Upper Midwest service territory. As the local <br />electricity sources become less dependent on the primary grid, through implementation of community <br />solar gardens or other technologies, the carbon dioxide emissions could be further reduced. <br />3.3.4. Financial Analysis <br />The initial cost of the low-temperature district energy system was estimated based on the Project <br />Team’s historical data for installation of piping and equipment. The pumping station, heat pumps, <br />furnaces, and air conditioning units were estimated based on major equipment budgetary pricing that <br />is readily available from manufacturers. The distribution piping was estimated based on historical data <br />for similar material installations in Minnesota. The low-temperature of the water allows for flexibility <br />of the piping system construction. The Project Team evaluated the material costs for a number of <br />materials and based the estimate on a high-density polyethylene piping system, due to the material <br />cost and ease of installation. A summary of the initial capital costs are provided in Table 17. <br />
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