Searched for: author%3A%22Schmehl%2C+R.%22
(1 - 20 of 107)

Pages

document
Joshi, R. (author), Kruijff, Michiel (author), Schmehl, R. (author)
In the current auction-based electricity market, the design of utility-scale renewable energy systems has traditionally been driven by the levelised cost of energy (LCoE). However, the market is gradually moving towards a subsidy-free era, which will expose the power plant owners to the fluctuating prices of electricity. This paper presents a...
journal article 2023
document
Thedens, Paul (author), Schmehl, R. (author)
Similar to parafoils, ram-air kites are flexible membrane wings inflated by the apparent wind and supported by a bridle line system. A major challenge in estimating the performance of these wings using a computer model is the strong coupling between the airflow around the wing and the deformation of the membrane structure. In this paper, we...
journal article 2023
document
van Hagen, L.J.A. (author), Petrick, Kristian (author), Wilhelm, Stefan (author), Schmehl, R. (author)
A key motivation for airborne wind energy is its potential to reduce the amount of material required for the generation of renewable energy. On the other hand, the materials used for airborne systems’ components are generally linked to higher environmental impacts. This study presents comparative life-cycle analyses for future multi-megawatt...
journal article 2023
document
Salma, V. (author), Schmehl, R. (author)
Integrating the operation of airborne wind energy systems safely into the airspace requires a systematic qualification process. It seems likely that the European Union Aviation Safety Agency will approve commercial systems as unmanned aircraft systems within the “specific” category, requiring risk-based operational authorization. In this paper,...
journal article 2023
document
Cayon, O. (author), Gaunaa, Mac (author), Schmehl, R. (author)
Soft-wing kites for airborne wind-energy harvesting function as flying tensile membrane structures, each of whose shape depends on the aerodynamic load distribution and vice versa. The strong two-way coupling between shape and loading poses a complex fluid-structure interaction problem. Since computational models for such problems do not yet...
journal article 2023
document
Porta i Ko, A.J. (author), Smidt, Sture (author), Schmehl, R. (author), Mandru, P.S.M. (author)
Airborne wind energy systems benefit from high-lift airfoils to increase power output. This paper proposes an optimisation approach for a multi-element airfoil of a fixed-wing system operated in pumping cycles to drive a drum-generator module on the ground. The approach accounts for the different design objectives of the tethered kite’s...
journal article 2023
document
Breuer, J.C.M. (author), Luchsinger, Rolf (author), Schmehl, R. (author)
Inflatable wings are of interest for applications where low weight, compact transport volume, and easy set-up are important. Examples are unmanned aerial vehicles with inflatable wings, paragliders and softkites for sport or airborne wind-energy applications. In this paper, a new method of designing and fabricating conformable inflatable wings...
journal article 2023
document
Eijkelhof, D. (author), Buendía Vela, Gabriel (author), Schmehl, R. (author)
High aerodynamic efficiency is a key design driver for airborne wind energy systems as it strongly affects the achievable energy output. Conventional fixed-wing systems generally use aerofoils with a high thickness-to-chord ratio to achieve high efficiency and wing loading. The box wing concept suits thinner aerofoils as the load distribution...
journal article 2023
document
Reuchlin, S.P.A. (author), Joshi, R. (author), Schmehl, R. (author)
The majority of remote locations not connected to the main electricity grid rely on diesel generators to provide electrical power. High fuel transportation costs and significant carbon emissions have motivated the development and installation of hybrid power systems using renewable energy such these locations. Because wind and solar energy is...
journal article 2023
document
Poland, J.A.W. (author), Schmehl, R. (author)
Airborne wind energy systems using flexible membrane wings have the advantages of a low weight, small packing volume, high mobility and rapid deployability. This paper investigates the aero-structural deformation of a leading edge inflatable kite for airborne wind energy harvesting. In the first step, a triangular two-plate representation of the...
journal article 2023
document
Sickler, M.V. (author), Ummels, B.C. (author), Zaaijer, M B (author), Schmehl, R. (author), Dykes, Katherine (author)
Layout optimisation is essential for improving the overall performance of offshore wind farms. During the past 15 years, the use of yield optimisation algorithms has resulted in a transition from regular to more irregular farm layouts. However, since the layout affects many factors, yield optimisation alone may not maximise the overall...
journal article 2023
document
Joshi, R. (author), von Terzi, D.A. (author), Kruijf, M. (author), Schmehl, R. (author)
In pumping airborne wind energy (AWE) systems, the kite is operated in repetitive crosswind patterns, pulling the tether from a winch that drives a generator on the ground. During the reel-out phase of its operation, it produces power, whereas, during the reel-in phase, it consumes a small fraction of the produced power. This leads to an...
journal article 2022
document
Eijkelhof, D. (author), Schmehl, R. (author)
Currently developed airborne wind energy systems have reached sizes of up to several hundred kilowatts. This paper presents the high-level design and a six-degrees-of-freedom model of a future fixed-wing airborne wind energy system operated in pumping cycles. This framework is intended to be used as an open-source reference system. The fixed...
journal article 2022
document
Schmidt, H.S. (author), de Vries, G. (author), Schmehl, R. (author), Renes, Reint Jan (author)
Airborne wind energy (AWE) systems use tethered flying devices to harvest higher-altitude winds to produce electricity. For the success of the technology, it is crucial to understand how people perceive and respond to it. If concerns about the technology are not taken seriously, it could delay or prevent implementation, resulting in increased...
journal article 2022
document
Watchorn, J.P. (author), Viré, A.C. (author), Schmehl, R. (author)
conference paper 2022
document
Eijkelhof, D. (author), Fagan, Edward (author), Schmehl, R. (author)
conference paper 2022
document
Thimm, L. (author), Schelbergen, M. (author), Bechtle, Philip (author), Schmehl, R. (author)
conference paper 2022
document
Thoms, Stefanie (author), Petrick, Kristian (author), Schmehl, R. (author)
conference paper 2022
document
Cayon, O. (author), Poland, J.A.W. (author), Schmehl, R. (author), Gaunaa, Mac (author)
poster 2022
document
Castro Fernández, I. (author), Cavallaro, Rauno (author), Schmehl, R. (author), Sánchez-Arriaga, Gonzalo (author)
conference paper 2022
Searched for: author%3A%22Schmehl%2C+R.%22
(1 - 20 of 107)

Pages