An overview of renewable electric power capacity and progress in new technologies in the world

Bilgili, Mehmet; Özbek, Arif; Şahi̇n, Beşi̇r; Kahraman, Ali

doi:10.1016/j.rser.2015.04.148

Cited by 197 publications

(68 citation statements)

References 50 publications

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“…It seems that wind energy generation is one of the most crucial alternatives of reducing fossil fuel consumption which is the main source of CO 2 emissions [20]. In last decade, the cost of initial investment of wind turbines has been declined considerably due to the progress of manufacturing technologies and a high rate of demand on wind turbines resulted of this reduction.…”

Section: Figurementioning

confidence: 99%

Yayıcı ile Güçlendirilmiş Rüzgar Türbini Teknolojilerinin İncelenmesi

Şahi̇n¹,

İlhan²,

Bilgili³

2017

Çukurova Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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Renewable energy technologies play an important role in contribution of global energy demand as well as conservation of the environment. Researchers have realized that wind turbines combined with a diffuser increase efficiency and start generating electricity with a lower wind speed. It is also expected that increasing efficiency of wind turbine results in reduction of energy generation cost. In this respects, designing wind turbine running with high efficiency with a lower wind speed needs further research and development. In this study, performance indicators of variety geometrically structured horizontal and vertical axis wind turbine technologies which their output power augmented through utilization of diffusers were investigated in detail. Keywords: Diffuser, Renewable energy, Wind turbine Yayıcı ile Güçlendirilmiş Rüzgar Türbini Teknolojilerinin İncelenmesi ÖzKüresel enerji ihtiyacının temin edilmesi ve çevrenin korunumu üzerine katkının sağlanmasında, yenilenebilir enerji teknolojileri önemli rol oynamaktadır. Araştırmacılar, yayıcı ile birleştirilmiş rüzgar türbinlerinin verimliliği artırdığını ve daha düşük rüzgar hızlarında elektrik üretimine başladıklarını fark etmişlerdir. İlaveten, rüzgar türbinine ait verimin artırılması, enerji üretim maliyetinin düşmesine sebep olmaktadır. Bu bakımdan, yüksek verimde ve daha düşük rüzgar hızında çalışan rüzgar türbinlerinin tasarımı ilave araştırma ve geliştirmeye ihtiyaç duymaktadır. Bu çalışmada, yayıcı ile güçlendirilmiş yatay ve dikey eksenli türbin teknolojilerinin farklı geometrilerdeki performans göstergeleri detaylı bir şekilde incelenmiştir.

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Section: Figurementioning

confidence: 99%

Yayıcı ile Güçlendirilmiş Rüzgar Türbini Teknolojilerinin İncelenmesi

Şahi̇n¹,

İlhan²,

Bilgili³

2017

Çukurova Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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“…The mechanical output power Pout at the wheel axle is still lower than P gr and P net , because different power losses occur in the wheel and headrace between the sluice gate and the wheel. Quaranta and Revelli [21] stated that six main kinds of power losses may occur in the wheel and headrace: (1) impact losses include the impact of the entry water on the blades (L imp ) and the impact of the blades on the tailrace (L t ), (2) leakage losses are water losses through the slits between the buckets and the channel (L Q ), (3) friction losses are due to mechanical friction at the shaft supports (L g ) and to drag effect of the water (contained in the buckets) on the channel bed (L bed ), (4) hydraulic losses may occur when the residual power of the water in the last bucket is lost in the tailrace (L h ) and (5)(6) there are the hydraulic (L c ) and leakage (L Qu ) losses in the headrace between the sluice gate and the wheel. P out can be calculated by:…”

Section: Breastshot Waterwheelsmentioning

confidence: 99%

“…In this revolution, energy efficiency, sustainable and low-carbon energy technologies play a crucial role. In addition, renewable energy technologies (biomass, wind, solar, hydro and geo-thermal) play an important role in addressing global energy and environmental challenges [2,3]. They are offering clean and reliable energy to reduce greenhouse gas emission that lead to global warming while saving money and creating jobs.…”

Section: Introductionmentioning

confidence: 99%

Mikro-Hidroelektrik Teknolojileri ve Su Çarkı Sistemlerinin Tasarım Özelliklerine Genel Bir Bakış

Bilgili¹,

Özbek²

2016

Çukurova Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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In recent years, the global warming and efficient usage of energy sources are become most attractive issues. Furthermore, renewable energy technologies play an important role in addressing global energy and environmental challenges. Among the renewable energy technologies, hydropower is considered to be the most advanced and mature, providing some level of electricity generation in more than 160 countries worldwide. Micro-hydropower plant is in the category of small-scale hydropower projects, and it provides an affordable, reliable, economically viable, socially acceptable and environmentally energy alternative for rural area. In this article, micro-hydropower technologies, design and performance characteristics, power losses, mechanical powers and efficiencies for the waterwheel systems such as breastshot, overshot and undershot are reviewed in detail and compared each other. In addition, the development of worldwide hydropower capacity is discussed, and the top countries in terms of total installed capacity are reported and investigated.Keywords: Micro-hydropower, Waterwheels systems, Breastshot, Overshot, Undershot. Mikro-Hidroelektrik Teknolojileri ve Su Çarkı Sistemlerinin TasarımÖzelliklerine Genel Bir Bakış ÖzetSon yıllarda, küresel ısınma ve enerji kaynaklarının verimli kullanılması en cazip konular haline gelmiştir. Ayrıca, yenilenebilir enerji teknolojileri, küresel enerji ve çevre sorunları açısından önemli bir rol oynamaktadır. Yenilenebilir enerji teknolojileri arasında, hidroelektrik dünya çapında 160'tan fazla ülkede elektrik üretimini belli bir düzeyde sağlayarak, en gelişmiş ve olgun olarak kabul edilmektedir. Mikro hidroelektrik santrali küçük ölçekli hidroelektrik projelerin kategorisindedir ve kırsal alan için uygun fiyatlı, güvenilir, sosyal açıdan kabul edilebilir, ekonomik ve çevre açısından duyarlı bir enerji alternatifi olarak sunulmaktadır. Bu makalede, gövde çarpmalı, üstten çarpmalı ve alttan çarpmalı gibi su çarkı sistemleri için mikro hidroelektrik teknolojilerinin tasarım ve performans özellikleri, güç kayıpları,

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“…As fossil energy depletion and environmental problems increase, interest in new and renewable energy is increasing [1][2][3]. Solar energy accounts for a large proportion of the new and renewable energy sources [4,5].…”

Section: Introductionmentioning

confidence: 99%

Design Methods of Underwater Grounding Electrode Array by Considering Inter-Electrode Interference for Floating PVs

et al. 2018

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An optimal design method is proposed in this paper to improve the safety and price competitiveness of floating photovoltaic (PV) systems. From the standards for grounding by the International Electrotechnical Commission (IEC) 60364, the Electrical Equipment Technology Standards (EETS) are set up for the grounding resistance to be less than or equal to 10 Ω for high voltage (above 750 V DC) and extra high voltage (above 7000 V) systems. In order to satisfy this criterion, a parallel connection of grounding electrodes is essential in the system. Furthermore, inter-electrode interference should be considered to reflect the resistance increase due to the potential increase between electrodes. Therefore, in this study, the parallel grounding resistance according to the distance and number of electrodes, as well as the arrangement method were theoretically predicted and compared with the measured values. For the first time, the design of grounding electrodes has been applied to real floating PV systems and is expected to satisfy EETS.

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An overview of renewable electric power capacity and progress in new technologies in the world

Cited by 197 publications

References 50 publications

Yayıcı ile Güçlendirilmiş Rüzgar Türbini Teknolojilerinin İncelenmesi

Yayıcı ile Güçlendirilmiş Rüzgar Türbini Teknolojilerinin İncelenmesi

Mikro-Hidroelektrik Teknolojileri ve Su Çarkı Sistemlerinin Tasarım Özelliklerine Genel Bir Bakış

Design Methods of Underwater Grounding Electrode Array by Considering Inter-Electrode Interference for Floating PVs

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