Black guillemot ecology in relation to tidal stream energy generation: An evaluation of current knowledge and information gaps

2018 ◽  
Vol 134 ◽  
pp. 121-129 ◽  
Author(s):  
Daniel T. Johnston ◽  
Robert W. Furness ◽  
Alexandra M.C. Robbins ◽  
Glen Tyler ◽  
Mark A. Taggart ◽  
...  
2021 ◽  
Vol 53 (1) ◽  
pp. 287-310
Author(s):  
Thomas A.A. Adcock ◽  
Scott Draper ◽  
Richard H.J. Willden ◽  
Christopher R. Vogel

Placing mechanical devices into fast-moving tidal streams to generate clean and predictable electricity is a developing technology. This review covers the fundamental fluid mechanics of this application, which is important for understanding how such devices work and how they interact with the tidal stream resource. We focus on how tidal stream turbines and energy generation are modeled analytically, numerically, and experimentally. Owing to the nature of the problem, our review is split into different scales—from turbine to array and regional—and we examine each in turn.


2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
De-Graft Owusu-Manu ◽  
E. Amo-Asamoah ◽  
Frank Ato Ghansah ◽  
George Asumadu

Purpose Kumasi Metropolis, the second-largest city in Ghana is known to be bewildered with challenges relating to waste management. As a means of solving the waste management challenge, several suggestions are often made for the establishment of a waste-to-energy plant to manage the disposal of waste and generation of income. There have been no studies conducted to determine how economically viable such plants will be. This study aims to examine the economic viability of waste-to-energy generation in the Kumasi Metropolis to find out how economically viable such an approach will be. Design/methodology/approach To achieve this, a simple debt-equity ratio business model based on discounted cash flow technique was applied to estimate the internal rate of returns (IRR) as a measure of the economic viability and profitability of a modelled 50 MWH waste-energy generation plant in the Kumasi Metropolis. The analysis was performed using the RetScreen Expert Software. Findings The results show that the IRR and benefits cost ratio of the facility were 36% and 5.8%, respectively, indicating high levels of profitability and economic viability. The study concludes that waste-to-energy generation will be an economically viable venture in the Kumasi Metropolis. Practical implications It is, however, important for users of the findings of this study to take caution of the fact that the various assumptions although based on current knowledge and expert opinion may vary with time; therefore, the sensitive analysis on price and costs should always be considered. Practically, this study will contribute to solving the waste management situation in most cities, as well as generating revenue and helping close the energy deficit most developing countries are grabbling with. Originality/value The unique contribution of the study to knowledge is that it has professed an alternative analytical and methodological approach to measuring the financial viability of waste-to-energy plants in situations where there is none in the geographical jurisdiction of the proposed project.


2018 ◽  
Vol 123 (7) ◽  
pp. 5041-5067 ◽  
Author(s):  
Michela De Dominicis ◽  
Judith Wolf ◽  
Rory O'Hara Murray

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