scholarly journals Pengaruh Perbandingan Runner Terhadap Performa Turbin Vertikal Bertingkat Dua

CICES ◽  
2016 ◽  
Vol 2 (2) ◽  
pp. 188-194
Author(s):  
Ade Sunardi ◽  
Yunan Hanun

Wind energy is an alternative energy resources that abundant, enviromentally friendly and potential to be develop. The Utilization of wind energy can be applied at wind turbine. Ratio of vane amount as a runner was the variable that use on this research such as . Research use natural windfor 24 hours and data became fluctuatif. Data test obtain ratio runner 6:10 have greatest rotational speed, which is 373 rpm and mean rotational speed is 83.42 rpm. Runner ratio 6:12 have lowest rotational speed 291 rpm and mean rotational speed is 20.13

Author(s):  
Baiq Liana Widiyanti

The need of larger quantity of energy to fulfill the demand of energy, especially thefossil fuel, forced the government of almost all nation try to find the new kind of energy orknown as alternative energy resources. Fossil fuel as non-renewable energy resources wouldbe decreased by the time if the using of it not under controlled. This kind of energy resourcesused to handle almost all the people need of energy, such as for domestic uses, industrial,tourism, etc. The used of fossil fuel for that purposed mostly for generated the electricitypower (by built the power plant). Many natural energy resources can used to generateelectricity power plant, but there always be some advantages and bad impact, especially forthe environments. One of environmental friendly alternative energy resources is exploitingthe form of wind power.Keyword: alternative energy, wind energy, windmills farms, human well-being.


2017 ◽  
Vol 3 (1) ◽  
pp. 11
Author(s):  
Masrufaiyah Masrufaiyah ◽  
Ridho Hantoro ◽  
Gunawan Nugroho ◽  
Totok R Biyanto ◽  
Nur Laila Hamidah

2017 ◽  
Vol 11 (1) ◽  
pp. 91-117 ◽  
Author(s):  
Dawit Guta ◽  
Jan Börner

Purpose Ethiopia’s energy sector faces critical challenges to meeting steadily increasing energy demand given limited infrastructure, heavy reliance on hydroelectric power and underdevelopment of alternative energy resources. The purpose of this paper was to identify optimal least cost investment decisions for integrated energy source diversification. The authors seek to contribute to the relevant literature by paying particular attention to the role of public policy for promoting renewable energy investment and to better understand future energy security implications of various sources of uncertainty. Design/methodology/approach The authors created a dynamic linear programming model using General Algebraic Modelling System software to explore the national energy security implications of uncertainties associated with increasing technological advances and efficiency, and climate change scenarios. Findings To cope with the impacts of drought expected from future climate change on hydroelectric power production, Ethiopia would need to invest in the development of alternative energy resources. Such investment would not only enhance the sustainability and reliability of energy production but also increase costs. Greater rates of technological and efficiency innovations, however, were found to improve electricity diversification and reduce production costs and shadow prices or resource scarcity, and are thus key for enhancing energy security and reducing the risks posed by drought. Originality/value The dynamic linear programming model by the authors represents a flexible sector modelling tool for exploring the sustainability and efficiency of energy resource development pathways and evaluating the effects of different sources of uncertainty on the energy sector.


Energies ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6750
Author(s):  
Valery Okulov ◽  
Ivan Kabardin ◽  
Dmitry Mukhin ◽  
Konstantin Stepanov ◽  
Nastasia Okulova

The review reflects physical solutions for de-icing, one of the main problems that impedes the efficient use of wind turbines for autonomous energy resources in cold regions. This topic is currently very relevant for ensuring the dynamic development of wind energy in the Arctic. The review discusses an effective anti-icing strategy for wind turbine blades, including various passive and active physical de-icing techniques using superhydrophobic coatings, thermal heaters, ultrasonic and vibration devices, operating control to determine the optimal methods and their combinations. After a brief description of the active methods, the energy consumption required for their realization is estimated. Passive methods do not involve extra costs, so the review focuses on the most promising solutions with superhydrophobic coatings. Among them, special attention is paid to plastic coatings with a lithographic method of applying micro and nanostructures. This review is of interest to researchers who develop new effective solutions for protection against icing, in particular, when choosing systems for protecting wind turbines.


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