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.


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


2019 ◽  
Vol 23 (Suppl. 5) ◽  
pp. 1779-1788
Author(s):  
Radivoje Pesic ◽  
Aleksnadar Davinic

Rapid growth in the energy consumption has conditioned the need for discovering the alternative energy resources which would be adapted to the existing engine constructions and which would satisfy the additional criteria related to the renewability, ecology, and reliability of use. The experimental research are conducted according to the (European Stationary Cycle - Directive 1999/96/EC) 13-mode. Using biodiesel fuel average thermal efficiency is kept at the level of the application of conventional diesel fuel, average emission of CO is reduced by 13.6%, average emission of NO is increased by x 27.6%, average emission of hydrocarbon is increased by 59.4%, and average particles emission is reduced by 43.2%.


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