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991.
科学合理、规范有序、持续发展——大力推进上海市浅层地热能开发利用 总被引:1,自引:0,他引:1
浅层地热能是绿色环保可再生清洁能源,其开发利用对建设资源节约型、环境友好型社会具有重要意义。介绍了上海开展浅层地热能的科研工作与开发应用成功实践,探讨了产业化发展中应重视和加强的技术和管理等方面的主要关键问题。 相似文献
992.
Along with the consumption increase of the petroleum products,more countries have transferred their attentions to the offshore fields,especially the deepwater oil and gas reserves.For deepwater exploitation,the risers must be installed to act as the conduits connecting surface platforms to subsea facilities.In this paper,the typical risers sorted by different classes are introduced,and the correspondent installation methods are presented.By investigating the recent projects performed in the deepwater hot spots,and combining the challenges of HYSY201 for riser installation,a lifting device developed for assisting riser installation is proposed and detailed to satisfy the installation of deepwater risers in the LW3-1 Gas Field of in the South China Sea.Tests on both the functions and performances of such a new system exhibit the satisfaction of meeting all challenging requirements of HYSY201 for application to riser installation in waters up to a depth of in the South China Sea. 相似文献
993.
潮流能无污染,可预测性高,环境影响小,是一种非常有发展潜力的可再生能源.近年来,潮流能开发技术发展迅速,日趋成熟.我国潮流能资源丰富,合理有效的开发潮流能资源对保障我国的能源安全意义重大.文中总结我国潮流能开发利用中存在的主要问题,提出我国潮流能开发工作的几点建议. 相似文献
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Surface energy and water vapor fluxes observed in a desert plantation in central Iran 总被引:1,自引:0,他引:1
A. Oliphant P. Zawar-rezaG. Azizi A. DehghanpourJ. Harrison 《Journal of Arid Environments》2011,75(10):926-935
Summertime observations of surface radiation budget, energy balance and atmospheric surface layer meteorology were made on an arid valley floor planted with Haloxylon aphyllum to combat desertification in central Iran. The surface microclimate is characterized and compared with other arid regions and the role of ‘desert greening’ on surface fluxes is considered. A high surface albedo (0.265) and large longwave radiation loss produced relatively low net radiation. Energy partitioning was dominated by sensible and ground heat fluxes with opposing diurnal asymmetry governed by strong diurnal variability in eddy diffusivity. The Bowen ratio was 2.53, which fell inside the range of other vegetated arid surfaces. Surface temperature gradients were strong both in the atmospheric surface layer and in the substrate, with consistent lapse conditions by day and inversions at night. The wind regime included a moderate daytime regional wind which displayed Coriolis turning and weaker nocturnal slope flows. Actual evapotranspiration (1 mm dy−1) was only a small fraction of potential evapotranspiration. The diurnal pattern of AET indicates strong stomatal control. The desert greening effect of Haloxylon plantations provided atmospheric water and reduced sensible heat flux by up to 40%. 相似文献
997.
利用黔南州1961~2010年50a的太阳日照时数资料,采用参考辐射站点的办法,对全州12个县市的太阳能资源进行了计算和分析评估,得出黔南州太阳能资源总体处于1 009.25~1 201.12 kW.h/m2.a,全州太阳能的高值区分布在州的南部,罗甸县、平塘县、独山县最高,而最差的则在州的西部长顺县,较差的为贵定县和瓮安县。 相似文献
998.
SOCIAL BARRIERS TO RENEWABLE ENERGY LANDSCAPES* 总被引:2,自引:0,他引:2
MARTIN J. PASQUALETTI 《Geographical review》2011,101(2):201-223
After many years of slow progress, we find that worldwide environmental, political, and economic pressures are providing greater purchase for the accelerated development of renewable energy. Although many people would consider this quickening pace good news, the transition from conventional resources has encountered public resistance. In this article I examine the nature of challenges to the development of geothermal, wind, and solar energy projects in three places: the United States, Scotland, and Mexico. The common thread in the public reservations about renewable energy is landscape change and the consequent disruption such change produces to established ways of life for those who are nearby. It also suggests the importance of rebalancing the emphasis of renewable energy programs away from the traditional technical focus that dominates development planning. The more suitable and expedient approach would be to consider the challenges of development as predominantly social matters with technical components, rather than the other way around. To accept this view is to unlock the door to a renewable energy future. 相似文献
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