Solar Project Description for Forest City Dillon Highrise Apartments, Washington, DC

摘要

The Forest City Dillon site is a high-rise apartment building in Washington, DC. The building has 188 apartments and a total of 124,000 square feet of living space. Solar energy is used only to preheat the domestic hot water (DHW). Six individual apartments are instrumented with flowmeters; however, the flow data is not used in the performance evaluation. The solar energy system has 12 arrays of flat-plate collectors with a gross area of 2592 square feet. The arrays face south at an angle of 40 exp 0 to the horizontal. A synthetic oil (parafinic) is the transfer medium that delivers solar energy from the collector arrays to a hot-water heat exchanger. Preheated water is stored in a 3200-gallon storage tank and supplied, on demand to a conventional 400-gallon hot water tank. When solar energy is insufficient to satisfy the total load, three oil-fired boilers provide auxiliary thermal energy. The dwelling has been fully instrumented for performance evaluation since July 1977 and the data is integrated into the National Solar Data Network. Original cost estimates for provisioning and installation of the solar system are given. (ERA citation 06:008943)