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TCAAP Energy Integration Resiliency Framework <br />Energy Source Implementation <br /> <br /> <br /> 47 <br /> Construction of a solar thermal garden in the vicinity of the energy transfer station. <br /> Installation of a commercial size heat pump at the energy transfer station. <br /> Future technologies that are currently unavailable in the market. <br />The proposed distribution system would consist of two pipes, supply and return, spanning from the <br />energy transfer station to the homes. To prevent the pipes from freezing, and to efficiently transfer the <br />energy, these pipes can be insulated and buried at shallow depths, or uninsulated, and buried at <br />greater depths. To keep the initial construction costs of the distribution system to a minimum, the <br />proposed district energy business could construct the distribution system and service extensions to the <br />homes, in coordination with site development. <br /> <br /> <br />Figure 9: Distributed ground source heat pump schematic <br />A set of two pipes would span between each home and the distribution system, one delivering water <br />to the home and one returning water to the distribution system. Each home would be equipped with a <br />water source heat pump unit, powered by electricity. This would replace the need for traditional <br />forced-air furnaces and electrically-driven air-conditioners. During the winter months, the heat pump <br />would take heat from the distribution system water and use it to heat the air inside the home. <br />Conversely, during the summer months, the heat pump will take heat from inside the home and reject <br />it to the distribution system, which is how the home is cooled. Figure 10 shows how home heat pump <br />systems operate inside the homes.