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Technical and Economic Feasibility of Using Hydrogen as Energy Storage System in Wind Farms

材料科学与工程（中英文版） 2010年第3期4卷 17-21页

作者： Orlando Lastres Danguillecourt Geovanni Hemandez Galvez Alrel Nunez Rodnguez jose rafael dorrego portela jose Alberto Saldafia Juarez Miriam Guadalupe Peralta Morales Instituto de Estudios de la Energia Universidad del ISTMO Oaxaca 70760 Mexico Centro de Investigacion en Energia UNAM. Temixco Morelos 62580 Mdxico

In this paper some of the results obtained in the research project "A Technical and Economic feasibility study of hydrogen production from solar and wind energy in the Istmo de Tehuantepec" are presented. The purpose of this study is to assess the viability of electrolytic hydrogen production in wind farms in the Istmo de Tehuantepec. Different configurations of hydrogen storage systems were simulated in local weather conditions and using local power grids. WAsP 9.1 (under license obtained by the Universidad del Istmo) and HOMER were used in this study. Using WAsP it was estimated that the annual energy produced by five BONUS 1MW/54 turbines is 18.70 GWh/year with an average capacity factor of 42.7%; efficient operation is projected for a wind farm with greater capacity. The HOMER simulation of a 500 MW wind farm in a 225 MW power grid, showed that 42% of the energy generated by the turbines is not integrated into the power grid and consequently it is used for electrolytic hydrogen production, with an annual production of 15,522 Ton at a cost of 11.60 USD/kg, for capital multipliers of 1 and 1.6 for the electrolyzer and the wind turbine respectively. It was established that by lowering the capital costs of both the electrolyzer and the wind turbine, it is possible to produce hydrogen at a cost of between 5.70 and 6.40 USD/kg, which is comparable to the current costs of conventional methods of hydrogen production. Favorable results were also obtained when a fuel cell was added to the system to introduce energy into the power grid at peak times, even when the selling price to the grid is less than 0.30 USD/kWh. In conclusion, given the current trend of rising fossil fuel prices as well as the existing and prospective technological advances in the production and storage of hydrogen, the electrolytic production of this fuel is feasible under the conditions found in the Istmo de Tehuantepec.

关键词：经济可行性存储系统风场能源技术氢

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An Analytical Procedure for Optimal Sizing of Wind Turbines in Different Wind Regimes

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材料科学与工程（中英文版） 2010年第2期4卷 9-13页

作者： Hernandez Geovanni Lastres Orlando Probst Oliver Pathiyamattom Sebastian dorrego jose rafael Centro de Investigacion en Energia UNAM. Temixco Morelos 62580 Mexico Instituto de Estudios de la Energia Universidad del ISTMO Oaxaca 68400 Mexico Instituto Tecnologico y de Estudios Superiores de Monterrey Nuevo Leon 64849 Mexico

In this paper a method is developed that allows optimum coupling between wind turbines and the wind characteristics at the installation site. Once the wind characteristics are known, the optimal design wind speed, defined as the wind speed at rated power that maximizes the so-called turbine performance index, can be calculated. General expressions for the wind turbine capacity factor and the turbine performance index are given and example calculations are carried out for different Weibull shape and scale factors. Once the rated velocity is known and the required wind turbine capacity is given, the diameter of the rotor required can be calculated. This ensures an optimum turbine performance and improves the global efficiency of the applications such as integrated wind/hydrogen fuel cell systems.

关键词：风力涡轮机 Weibull 程序风况浆纱优化性能指标发电机组容量

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Study of Technical and Economical Sensitivity in Stand Alone Systems in a Rural Community

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材料科学与工程（中英文版） 2010年第9期4卷 59-65页

作者： Lastres Orlando Pathiyamattom Sebastian Geovanni Hernandez Galvez Juantorena Alina Nfifies Airel dorrego jose rafael Sainchez rafael Institute for Energy Studies UN ISTMO Tehuantepec Oaxaca Mexico Energy Research Center Solar Materials Department UNAM Temixeo Morelos Mexico Faculty of Pharmacy Autonomous University of Morelos State Morelos Mexico Faczulty of Mechanical Engineering Eastern University Santiago de Cuba Cuba

This paper presents a study of technical and economical sensitivity for different standalone system configurations with renewable and conventional sources of energy, with storage of hydrogen and batteries. The main objective is to establish the cost of the energy that is produced by such systems. The free software hybrid optimization model for electric renewables (HOMER) was used in this work. Different combinations for the generation of electricity are included in this sensitivity analysis, and the combinations of optimal systems are obtained. The tendencies of the cost of the energy produced in different conditions of the annual wind speed average and of the cost of the fuel cell are described. The cost related to the storage of hydrogen adversely affects the present systems. However, the sensitivity analysis of the cost of production of energy by means of renewable sources of energy has shown that it is possible to obtain systems whose costs of production of energy are similar to those of current systems of renewable sources.

关键词：敏感性分析独立系统农村社区经济技术研究站可再生能源传统能源

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护理干预促进慢性呼吸困难患者自我管理的研究进展:整合性综述

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International Journal of Nursing Sciences 2024年第2期11卷 241-257,I0003页

作者： Helga rafael Henriques Andreia Correia Tatiana Santos jose Faria Diana Sousa Joana portela Joana Teixeira Nursing School of Lisbon LisbonPortugal CIDNUR-Nursing Research Innovation and Development Centre of LisbonLisbonPortugal Unidade de Hemodi-alise de Torres Vedras-Nephrocare Torres VedrasPortugal Unidade de Cuidados Continuados na AMETIC Torres VedrasPortugal Unidade Local de Saúde Sao jose Cardiology DepartmentLisbonPortugal Unidade Local de Saúde da Arrabida General Surgery DepartmentSetúbalPortugal

目的旨在通过系统综述,确定针对复杂慢性病患者增强自我管理的干预措施,以改善慢性呼吸困难,为护理人员促进该类人群的自我管理提供依据。方法2023年12月,系统检索Medline、Scopus、Web of Science、CINAHL、Cochrane图书馆和乔安娜布... 详细信息

目的旨在通过系统综述,确定针对复杂慢性病患者增强自我管理的干预措施,以改善慢性呼吸困难,为护理人员促进该类人群的自我管理提供依据。方法2023年12月,系统检索Medline、Scopus、Web of Science、CINAHL、Cochrane图书馆和乔安娜布里格斯研究所(Joanna Briggs Institute,JBI)循证实践数据库。对纳入研究进行数据提取和综合,研究人员采用Rayyan文献管理软件筛选标题及摘要,并依据JBI研究质量评估工具进行方法学质量评估。结果共纳入18项研究。这些研究探讨了针对慢性呼吸困难的各种干预措施,包括药物干预(氧气疗法和吸入疗法)和非药物方法(教育计划、呼吸练习、液体摄入管理、身体感知技术、同伴支持、情商培训和网络应用程序的使用)。这些干预措施减轻了患者情绪困扰,可以使患者在自我管理方面变得独立自主。结论促进复杂慢性病患者对慢性呼吸困难的自我管理需要采取综合方法,但目前研究中没有充分考虑到针对患者行为改变的干预措施,需要进一步开展相关研究完善干预措施。

关键词：慢性疾病呼吸困难护理病人自我管理

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