DOE Solar Energy Technologies Program

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DOE Solar Energy Technologies Program ( doe-solar-energy-technologies-program )

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2.1 Conduct the 2005 Solar Decathlon The Solar Decathlon is an intercollegiate competition to design, build, and operate the most attractive and energy-efficient solar-powered home. Eighteen teams of students from the United States, Canada, and Spain are competing. Teams were selected through a competitive procurement in 2003, and have been working on their projects over the intervening 2 years, under our supervision and guidance. They will transport their houses to the National Mall in Washington, D.C., where they build a “solar village” and open their homes to the visiting public from October 7 to October 16, 2005. They compete against one another in ten contests. The contests will test the teams’ abilities to produce electricity and hot water from solar panels to perform all the functions of home—from turning on the lights to cooking, washing clothes and dishes, powering home electronics, and maintaining a comfortable temperature. These homes must also provide the power for an electric car. In addition to the energy- related contests, each team will be judged on its home's architecture and livability. And expert homebuilders will evaluate each home’s “build- ability” (ease of construction and replication of design). The teams must provide documentation about their homes’ designs and communicate about their homes to the public. Scoring, selection of judges, review of designs, instrumentation, development of communications materials and review of exhibit designs, coordination of teams, sponsors, and volunteers, procurement of stagecraft and assembly of the village, and safe conduct of the entire event comprise the activities of this project for the NREL organizers and its subcontractors. Some contests will be scored by measuring performance, and some will be scored by judges representing expertise in appropriate fields. For more information, visit the Solar Decathlon Web site (www.solardecathlon.org). The primary sponsors of the Solar Decathlon are the U.S. Department of Energy’s Office of Energy Efficiency and Renewable Energy, with its National Renewable Energy Laboratory, the American Institute of Architects, NAHB, and private-sector sponsors BP, the DIY Network, and Sprint-Nextel. 2.2 Complete a Releasable E-10 Version 1.8 ENERGY-10, an award-winning PC-based design tool, helps architects and building designers quickly identify the most cost-effective, energy- saving measures for residential and small commercial buildings. ENERGY-10 can quickly 87 identify the best combination of energy-efficient strategies, including daylighting, passive solar heating, and high-efficiency mechanical systems. The significant new addition and goal for FY 2005 in Version 1.8, supported by the BIPV Project, is the integration of grid-tied PV systems (using EnergyPlus as the simulation engine) and simple modeling of solar domestic hot water (SDHW) as new strategies that can be applied either manually or automatically. 2.3 Hold a BIPV Workshop for Big-Box Retailers Attract major retailers and others to a workshop on commercial applications of PV in buildings. 2.4 Conclude the ZEH Potential Study This goal of this study is to present a far-reaching outlook into the possibilities for net zero energy home (ZEH) technologies in the new home market and their potential impact on U.S. energy consumption through 2050. Zero energy homes, which are connected to the utility grid, combine highly energy efficient design and technology with solar electric and thermal systems to produce as much energy as they use on an annual basis. This study examines four scenarios for the adoption of ZEH into the single-family home market and the effect of each scenario on residential energy consumption through 2050. A reference case, where household energy use remains constant, serves as a basis for comparison. Zero energy homes are technically feasible today. If cost trends continue and research milestones are accomplished in solar energy and efficiency technologies, ZEH will become economically competitive with conventional construction when utility costs are included in the cost of homeownership. Market penetration of highly efficient homes with solar energy systems has already begun and will continue in selected markets. Solar electric (photovoltaic) system costs have continued to decline while production continues to increase by about 30% annually. New, low-cost solar water heating designs are under development that will reduce costs and improve efficiency. At the same time, a portfolio of energy efficiency improvements in appliances, building envelopes, windows, and mechanical systems is moving into the market. Combined, all of these elements suggest a potential to build practical ZEH with a significant market potential. But critical questions remain, including the Photovoltaic R&D Technology Development

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