More than ever, the generation of energy from renewable sources has become one of the most critical and challenging areas of human activity. This is the result of a number of factors acting simultaneously, including the highly publicized greenhouse effect, the need to reduce CO2 emissions, the dwindling of natural resources and thus the need to protect them, including the preservation of wealth (among other natural resources) for future generations. This paper presents a numerical investigation of the operation of a vertical axis wind turbine with guide vanes. The work analyzes the obtained power on the turbine rotor for different numbers of rotor blades and different numbers of guide vanes, as well as for different proportions of the width of the rotor ring and the guide ring. The analyses carried out point to the potential feasibility of using this type of design in practice. The obtained power coefficient is higher than that of classical vertical axis wind turbines. The analyses also indicate that the proposed design solution can be optimized to increase the efficiency of wind energy extraction.
Currently, obtaining energy from renewable sources, as never before, it has become one of the most important areas, but at the same time challenges in human activities. This is the effect of many factors simultaneously, including because of the media trumpeted the greenhouse effect, the necessity of reducing CO2 emissions, shrinking natural resources, and thus the desire to protect their welfare including conservation (including natural resources) for future generations. The paper presents the results of preliminary numerical analyzes of work for vertical axis wind turbines equipped with air guides. The carried out analyzes indicate the potential possibility of using this type of construction in practice. The obtained power factor value is higher than in classic wind turbines with a vertical axis. The conducted analyzes also indicate the possibility of optimizing the proposed constructional solution in order to increase efficiency of obtaining energy from the wind.
W globalnej gospodarce ważne jest nie tylko wykonanie produktu czy usługi, ale także zainteresowanie nimi klientów. W pogoni za ich zdobyciem wytwórcy podejmują działania, na które możemy spojrzeć pod kątem standardów etycznych i prawnych. Autorzy podejmują ten problem, próbując przybliżyć czytelnikowi wymagania istniejące w tym zakresie w Polsce, przywołując wiele unormowań prawnych i normatywnych dokumentów etycznych. Znajdziemy tu także uwagi dotyczące reklamy papierosów i wyrobów alkoholowych oraz ogólne spostrzeżenia związane z jakością reklamy.
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