Heliothermic electricity generation is gaining popularity in several countries worldwide. In Brazil, this form of energy generation has not yet been explored for large scale projects. However, the country possesses ex...Heliothermic electricity generation is gaining popularity in several countries worldwide. In Brazil, this form of energy generation has not yet been explored for large scale projects. However, the country possesses extensive areas with normal and high-intensity direct irradiation and low seasonality factors, particularly in the semi-arid region of the Brazilian Northeast. The region also presents other important features for setting up such plants: proximity to transmission lines, sufficient flatness, non-endangered vegetation, a suitable land use profile low maximum wind speeds, low population density, and more recently, an increase in the demand for local electric energy due to economic growth above the Brazilian average. A Geographic Information System includes a set of specialised resources that allow us to manipulate spatial data, providing quickness and efficiency in the identification of appropriate places for installing solar power plants while also preparing us for future scenarios, with regards to their impacts, costs and benefits. This article presents a study of the optimal location for thermoelectric power plants in the semi-arid region of the Brazilian Northeast on the scale of 1:10,000,000. All provinces with good potential for the implementation of large-scale concentrating solar power plants are identified. Considering that the installed capacity for parabolic cylindrical concentrators in terrains with a steepness of less than 1% is 43.26 MW/km2 for systems without storage and 30.82 MW/km2 for systems with 6 hours of storage, the potential of the southeast region of Piauí alone is huge. Even with the lack of information about the urban areas, terrain continuity, and other variables,utilising only 10% of the identified potential area, or879.7 km2, would result in an installed capacity of 38.1-27.1 GW. This value corresponds to more than 1/3 of the potency of the current Brazilian electric system. If the same calculation is made for the semi-arid region of the Brazilian Northeast, its capacity will be greater than 1000 GW.展开更多
根据大唐国际张家口发电厂分散控制系统(DCS,distributed control system)的应用现状,简要介绍了火电厂管理监控信息系统(SIS,supervisory information system)建设的必要性、指导思想和总体目标。系统阐述了火电厂厂级SIS的规划设计模...根据大唐国际张家口发电厂分散控制系统(DCS,distributed control system)的应用现状,简要介绍了火电厂管理监控信息系统(SIS,supervisory information system)建设的必要性、指导思想和总体目标。系统阐述了火电厂厂级SIS的规划设计模型及实时数据库系统(PI)接口的研究思路;以期抛砖引玉,提高火电厂SIS建设水平,提高电厂管理水平与经济效益。展开更多
基金the ConselhoNacional de Pesquisa(CNPq),Centrais Eletricas Brasileiras S.A.(ELETRO-BRAS),Companhia Hidro Eletrica do Sao Francisco(CHESF)and Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior(CAPES)for their support to the solar energy research projects,which have provided the material means and the scientific environment for the execution of this research.
文摘Heliothermic electricity generation is gaining popularity in several countries worldwide. In Brazil, this form of energy generation has not yet been explored for large scale projects. However, the country possesses extensive areas with normal and high-intensity direct irradiation and low seasonality factors, particularly in the semi-arid region of the Brazilian Northeast. The region also presents other important features for setting up such plants: proximity to transmission lines, sufficient flatness, non-endangered vegetation, a suitable land use profile low maximum wind speeds, low population density, and more recently, an increase in the demand for local electric energy due to economic growth above the Brazilian average. A Geographic Information System includes a set of specialised resources that allow us to manipulate spatial data, providing quickness and efficiency in the identification of appropriate places for installing solar power plants while also preparing us for future scenarios, with regards to their impacts, costs and benefits. This article presents a study of the optimal location for thermoelectric power plants in the semi-arid region of the Brazilian Northeast on the scale of 1:10,000,000. All provinces with good potential for the implementation of large-scale concentrating solar power plants are identified. Considering that the installed capacity for parabolic cylindrical concentrators in terrains with a steepness of less than 1% is 43.26 MW/km2 for systems without storage and 30.82 MW/km2 for systems with 6 hours of storage, the potential of the southeast region of Piauí alone is huge. Even with the lack of information about the urban areas, terrain continuity, and other variables,utilising only 10% of the identified potential area, or879.7 km2, would result in an installed capacity of 38.1-27.1 GW. This value corresponds to more than 1/3 of the potency of the current Brazilian electric system. If the same calculation is made for the semi-arid region of the Brazilian Northeast, its capacity will be greater than 1000 GW.
文摘根据大唐国际张家口发电厂分散控制系统(DCS,distributed control system)的应用现状,简要介绍了火电厂管理监控信息系统(SIS,supervisory information system)建设的必要性、指导思想和总体目标。系统阐述了火电厂厂级SIS的规划设计模型及实时数据库系统(PI)接口的研究思路;以期抛砖引玉,提高火电厂SIS建设水平,提高电厂管理水平与经济效益。
