Renewable Energy Technologies: Hearings Before the Subcommittee on Energy Research and Development of the Committee on Energy and Natural Resources, United States Senate, One Hundredth Congress, First Session, on the Current Status of the Renewable Energy Technologies in Our National Energy Policy--fiscal Years 1988-89, March 24 and 26, 1987

Couverture

À l'intérieur du livre

Autres éditions - Tout afficher

Expressions et termes fréquents

Fréquemment cités

Page 83 - Again; we thank you for the opportunity to present our views; and we look forward to working with the Subcommittee to develop a sound and increasingly useful wind research program.
Page 23 - Material and Structures Research, and Oceanographic, Environmental, and Geotechnical Research — have provided a data base that is useful for the two FY 1988 research areas, and do not currently require the degree of emphasis that was necessary in past years. The objective of the experimental verification and testing program is to verify functional feasibility, performance, and operational characteristics of OTEC components, such as heat exchangers and process controls, on a scale that can be extrapolated...
Page 78 - Like other renewable energy technologies, wind energy has a high initial capital cost compared to conventional energy technologies, and the investment credits were an ideal incentive. As it is, the pace of wind energy's growth slowed sharply. The total capacity of new wind turbines installed in 1986 dropped to about 200 megawatts (MW) from approximately 500 MW in 1985, a 60% reduction after four straight years of exponential growth. In 1987, about 150 MW were installed, for a further 25% drop. Nevertheless...
Page 117 - Before the inception of the National Photovoltaics Program, whose intent is to make photovoltaics feasible for terrestrial uses, photovoltaic systems were used almost exclusively to power satellites. Now, eleven years after the start of the program, the United States has installed thousands of photovoltaic systems around the world. They include large systems, like a 6.5 megawatt installation in California; small systems that pump water in Nigeria or light a cabin in the Montana mountains; and intermediate-size...
Page 28 - Research also will be carried out to determine the depth and size of a large continental magma chamber, to evaluate alternative methods of energy conversion, and to develop materials and instrumentation capable of operations in the 1000 degree Celsius magma environment. Hot dry rock research involves the evaluation of the properties of deep crystalline rock and the development of methods to extract geothermal heat from such resources.
Page 83 - Experiment," which will look Intensively at all aspects of operation of a single test wind turbine and attempt to correlate structural stress with wind Inflow. If completely successful. It would allow us to find out exactly which wind conditions cause problems from a stress and fatigue point of view and to design for those conditions. We recommend increased funding for efforts to correlate wind inflow/turbulence and structural loads so as to identify key factors in wind turbine stress and fatigue....
Page 13 - AB a result of DOE's program, single-crystal gallium arsenide and single-crystal silicon solar cells currently hold records for the most efficient photovoltaic conversion of sunlight to electricity. But the efficiency of such materials Is Inherently limited because not all Incident sunlight can be utilized due to the frequency selectivity of the specific materials Involved. To overcome this difficulty, researchers...
Page 452 - American Council for an Energy-Efficient Economy 1001 Connecticut Ave., NW, Suite 535 Washington, DC 20036 (202) 429-8873 Energy Conservation Coalition 1001 Connecticut Ave., NW Washington, DC 20036 (202...
Page 124 - Program, use a high vacuum space between two glazings with lowemittance coatings to achieve an insulating value nearly equivalent to that of a solid wall. The two glazings are separated by small glass beads that counteract the atmospheric pressure, and the glazing edges are sealed by laser welding performed in a vacuum chamber.
Page 226 - competitive rates of return on investment cannot be realized by private firms, either because they are difficult to predict or highly risky, or because they would require an exceptionally long time to be realized.

Informations bibliographiques