19,302 research outputs found
The State of Impact Investing in Latin America
This report lays out an assessment of the current landscape, some of the critical challenges ahead and the likely path forward over the next five 5 to 10 years on impact investing in Latin America
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Introducing Competition in the French Electricity Supply Industry: The Destabilisation of a Public Hierarchy in an Open Institutional Environment
The French electricity supply industry is characterized by a vertically integrated monopoly and public ownership and when the government introduced market rules, it was with the aim of preserving the integration of the public incumbent as a national champion. This had two paradoxical effects in favour of competition development and the building of safeguards for entrants
Solar powered Stirling cycle electrical generator
Under NASA's Civil Space Technology Initiative (CSTI), the NASA Lewis Research Center is developing the technology needed for free-piston Stirling engines as a candidate power source for space systems in the late 1990's and into the next century. Space power requirements include high efficiency, very long life, high reliability, and low vibration. Furthermore, system weight and operating temperature are important. The free-piston Stirling engine has the potential for a highly reliable engine with long life because it has only a few moving parts, non-contacting gas bearings, and can be hermetically sealed. These attributes of the free-piston Stirling engine also make it a viable candidate for terrestrial applications. In cooperation with the Department of Energy, system designs are currently being completed that feature the free-piston Stirling engine for terrestrial applications. Industry teams were assembled and are currently completing designs for two Advanced Stirling Conversion Systems utilizing technology being developed under the NASA CSTI Program. These systems, when coupled with a parabolic mirror to collect the solar energy, are capable of producing about 25 kW of electricity to a utility grid. Industry has identified a niche market for dish Stirling systems for worldwide remote power application. They believe that these niche markets may play a major role in the introduction of Stirling products into the commercial market
Ubiquitous energy storage
This paper presents a vision of a future power system with "ubiquitous energy storage", where storage would be utilized at all levels of the electricity system. The growing requirement for storage is reviewed, driven by the expansion of distributed generation. The capabilities and existing applications of various storage technologies are presented, providing a useful review of the state of the art. Energy storage will have to be integrated with the power system and there are various ways in which this may be achieved. Some of these options are discussed, as are commercial and regulatory issues. In two case studies, the costs and benefits of some storage options are assessed. It is concluded that electrical storage is not cost effective but that thermal storage offers attractive opportunities
Developments in Dutch Environmental Policy: Target Rationality or Cultural Shift?
In this article we have discussed developments in Dutch environmental policy from a certain 'rational' and a certain 'cultural' perspective. Both perspectives appear to be satisfactory only to a certain degree. The interpretation of the development of policy as a consequence\ud
of a learning process leaves important questions unanswered. The changes towards a consensual approach and standards that are based more on group ties can only be understood on the basis of cultural theory if a shift in orientation within the various subcultures is assumed. This is contrary to theory, however. After all, according to theory such situations are not 'viable'
Solar/hydrogen systems assessment. Volume 1: Solar/hydrogen systems for the 1985 - 2000 time frame
Opportunities for commercialization of systems capable of producing hydrogen from solar energy were studied. The hydrogen product costs that might be achieved by the four selected candidate systems was compared with the pricing structure and practices of the commodity gas market. Subsequently, product cost and market price match was noted to exist in the small user sector of the hydrogen marketplace. Barriers to and historical time lags in, commercialization of new technologies are reviewed. Recommendations for development and demonstration programs designed to accelerate the commercialization of the candidate systems are presented
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