Narrow search
Showing 1 - 10 of 110
Cover Image
Security aspects of future renewable energy systems–A short overview
Johansson, Bengt - In: Energy 61 (2013) C, pp. 598-605
Energy security is sometimes used to advocate renewable energy systems. Renewable energy systems can improve some aspects of security, but they will not automatically lead to the removal of all types of security problems and new problems will most certainly arise. This paper analyses energy...
Persistent link: https://www.econbiz.de/10010807257
Cover Image
Short-term electricity planning with increase wind capacity
Pereira, Sérgio; Ferreira, Paula; Vaz, A.I.F. - In: Energy 69 (2014) C, pp. 12-22
The variable electricity output of the RES (renewable energy sources) power plants, such as wind and hydropower, is an …, wind power will not replace hydropower but a decrease of thermal power production is foreseen as more wind power is added …
Persistent link: https://www.econbiz.de/10010810917
Cover Image
A GIS-based model to calculate the potential for transforming conventional hydropower schemes and non-hydro reservoirs to pumped hydropower schemes
Fitzgerald, Niall; Lacal Arántegui, Roberto; McKeogh, Eamon - In: Energy 41 (2012) 1, pp. 483-490
storage. Pumped hydropower remains the only mature and widely-adopted utility-scale energy storage technology. However, the … selection and development of new pumped hydropower sites is heavily influenced by physical constraints such as terrain, as well … culturally sensitive sites. Hence, transforming existing reservoirs to pumped hydropower schemes is often considerably easier …
Persistent link: https://www.econbiz.de/10011055327
Cover Image
Performance of small-scale bladeless electromagnetic energy harvesters driven by water or air
Zhao, Dan; Ji, Chenzhen; Teo, C.; Li, Shihuai - In: Energy 74 (2014) C, pp. 99-108
In this work, three different-diameter energy harvesters driven by turbulent air flow and rainwater are designed. Experiments are conducted first on the air-driven harvesters to gain insight on the energy conversion process. Unlike conventional blade-involved systems, the present setup involves...
Persistent link: https://www.econbiz.de/10011055359
Cover Image
Projecting changes in annual hydropower generation using regional runoff data: An assessment of the United States federal hydropower plants
Kao, Shih-Chieh; Sale, Michael J.; Ashfaq, Moetasim; … - In: Energy 80 (2015) C, pp. 239-250
Federal hydropower plants account for approximately half of installed US conventional hydropower capacity, and are an … Survey WaterWatch runoff and annual hydropower generation, a runoff-based assessment approach is introduced in this study to … project changes in annual and regional hydropower generation in multiple power marketing areas. Future climate scenarios are …
Persistent link: https://www.econbiz.de/10011190969
Cover Image
A comparison between renewable transport fuels that can supplement or replace biofuels in a 100% renewable energy system
Connolly, D.; Mathiesen, B.V.; Ridjan, I. - In: Energy 73 (2014) C, pp. 110-125
Identifying renewable energy alternatives in transport is particularly complicated, since the end-user can vary from a single-person car to a cargo ship. The aim of this paper is to aid this process by comparing 7 different methods for producing transport fuels in terms of the resources...
Persistent link: https://www.econbiz.de/10010906872
Cover Image
Identification of different woody biomass for energy purpose by means of Soft Independent Modeling of Class Analogy applied to thermogravimetric analysis
Toscano, G.; Duca, D.; Rossini, G.; Mengarelli, C.; … - In: Energy 83 (2015) C, pp. 351-357
In the renewable energy production solid biomass has became one of the most important source for power and heat generation, in particular woody materials in the form of wood chips, pellet and briquette. Technical standards on solid biofuels require information about origin and source of the...
Persistent link: https://www.econbiz.de/10011264373
Cover Image
Pre-treatment technologies, and their effect on international bioenergy supply chain logistics. Techno-economic evaluation of torrefaction, fast pyrolysis and pelletisation
Uslu, Ayla; Faaij, André P.C.; Bergman, P.C.A. - In: Energy 33 (2008) 8, pp. 1206-1223
The pre-treatment step has a significant influence on the performance of bioenergy chains, especially on logistics. Torrefaction, pelletisation and pyrolysis technologies can convert biomass at modest scales into dense energy carriers that ease transportation and handling.
Persistent link: https://www.econbiz.de/10010807308
Cover Image
A GIS (geographical information system)-based spatial data mining approach for optimal location and capacity planning of distributed biomass power generation facilities: A case stu...
Kaundinya, Deepak Paramashivan; Balachandra, P.; … - In: Energy 52 (2013) C, pp. 77-88
This paper primarily intends to develop a GIS (geographical information system)-based data mining approach for optimally selecting the locations and determining installed capacities for setting up distributed biomass power generation systems in the context of decentralized energy planning for...
Persistent link: https://www.econbiz.de/10010808107