Other
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004esasp.567...17s&link_type=abstract
Proceedings of The 4th International Conference on Solar Power from Space - SPS '04, together with The 5th International Confere
Other
1
Scientific paper
Solar power plants are among promising long-term energy options of the 21st century, covering humanities ever increasing energy need in a sustainable way free of greenhouse gas emission. Terrestrial solar power is one of the fastest growing energy sectors with high growth rates sustained over more than a decade and very promising forecasts. Since 30 years the idea of a large solar power plant in Earth orbit, transmitting energy to Earth-bound receiver sites enjoys periodic attention from energy and space entities. All studies concluded the principal technical feasibility of the concepts and gradually improved their power to mass ratio. No substantial development efforts were undertaken however since with current technology space generated electricity costs would still be too high, upfront costs prohibitive and the launcher sector not mature enough to reduce e/kg to orbit costs by the required order of magnitude. In the past space concepts were mainly compared to traditional energy systems. Based on this background, the Advanced Concepts Team (ACT) at the European Space Agency started a three-phased programme in 2003. The first phase of the programme, the Validation Phase, focussed on a comparison of space solar power plant with comparable terrestrial solutions on the one hand and the assessment of the potential of SPS for space exploration and space application on the other. The focus was mainly on Europe and should give an independent technical answer to the seemingly primitive question: "Why put power plants into space when there is so much sun in southern Europe and especially in the close-by North-African Sahara desert?". Space concepts were compared to terrestrial solutions based on equally advanced technology and equal economic conditions for the timeframe 2020/30 in terms of energy payback times, final e/kWh generation costs, adaptability to different energy scenarios, reliability and risk. Key words: ESA SPS Programme Plan; Strategy.
Ongaro Franco
Summerer Leopold
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