RETROFITTING OF FLETTNER ROTORS – RESULTS FROM SEA TRIALS OF THE GENERAL CARGO SHIP “FEHN POLLUX”

2021 ◽  
Vol 162 (A4) ◽  
Author(s):  
M Vahs
Keyword(s):  
Applied Sciences ◽  
Large Diameter ◽  
Environmental Data ◽  
Transport Costs ◽  
Performance Potential ◽  
Model Calculations ◽  
Fuel Savings ◽  
Ship Management ◽  
University Of Applied Sciences ◽  
General Cargo

In 2018, a German- Dutch project consortium under the scientific direction of the Emden/Leer University of Applied Sciences retrofitted and commissioned the latest rotor development of the Eco-Flettner type on the test ship Fehn Pollux of the Leer-based shipping company Fehn Ship Management. Main design features are both upper and lower endplates with large diameter for improved aerodynamic performance and modular manufacturing. The retrofitting concept is groundbreaking in terms of easy transferability to other ships. Upscaling to a significant share of the world merchant fleet could make a substantial and realizable contribution to climate protection in the short term and potentially reduced transport costs in the long term. The most frequently asked question in connection with modern sail drives is about the performance potential and the associated fuel savings. Transparent performance data is required to enable an economic prognosis for the use of Flettner rotors on ships. The Faculty of Maritime Sciences at Emden/ Leer University of Applied Sciences has developed an automatic control and monitoring system for Flettner rotors that also records extensive operating and environmental data. The data shows that all previous assumptions and model calculations are basically correct. With regard to the performance potential, the first series of measurements show even higher rotor forces compared with model calculations. This is a further benefit for Flettner rotor efficiency and could help the technology achieve a breakthrough as a building block for low-emission shipping.

Retrofitting of Flettner Rotors – Results From Sea Trials of the General Cargo Ship “Fehn Pollux”

2020 ◽  
Vol 162 (A4) ◽  
Author(s):  
M Vahs
Keyword(s):  
Applied Sciences ◽  
Large Diameter ◽  
Environmental Data ◽  
Transport Costs ◽  
Performance Potential ◽  
Model Calculations ◽  
Fuel Savings ◽  
Ship Management ◽  
University Of Applied Sciences ◽  
General Cargo

In 2018, a German- Dutch project consortium under the scientific direction of the Emden/Leer University of Applied Sciences retrofitted and commissioned the latest rotor development of the Eco-Flettner type on the test ship Fehn Pollux of the Leer-based shipping company Fehn Ship Management. Main design features are both upper and lower endplates with large diameter for improved aerodynamic performance and modular manufacturing. The retrofitting concept is groundbreaking in terms of easy transferability to other ships. Upscaling to a significant share of the world merchant fleet could make a substantial and realizable contribution to climate protection in the short term and potentially reduced transport costs in the long term. The most frequently asked question in connection with modern sail drives is about the performance potential and the associated fuel savings. Transparent performance data is required to enable an economic prognosis for the use of Flettner rotors on ships. The Faculty of Maritime Sciences at Emden/ Leer University of Applied Sciences has developed an automatic control and monitoring system for Flettner rotors that also records extensive operating and environmental data. The data shows that all previous assumptions and model calculations are basically correct. With regard to the performance potential, the first series of measurements show even higher rotor forces compared with model calculations. This is a further benefit for Flettner rotor efficiency and could help the technology achieve a breakthrough as a building block for low-emission shipping.

RETROFITTING OF FLETTNER ROTORS – RESULTS FROM SEA TRIALS OF THE GENERAL CARGO SHIP “FEHN POLLUX”

2019 ◽  
Author(s):  
M Vahs
Keyword(s):  
Applied Sciences ◽  
Environmental Data ◽  
Substantial Contribution ◽  
Performance Potential ◽  
Model Calculations ◽  
Fuel Savings ◽  
Ship Management ◽  
University Of Applied Sciences ◽  
General Cargo ◽  
Control And Monitoring System

In 2018, a German- Dutch project consortium under the scientific direction of the Emden/Leer University of Applied Sciences retrofitted and commissioned the latest rotor development of the Eco-Flettner type on the test ship Fehn Pollux of the Leer-based shipping company Fehn Ship Management. The retrofitting concept is ground-breaking in terms of easy transferability to other ships. Upscaling to a significant share of the world merchant fleet could make a substantial contribution to climate protection. The most frequently asked question in connection with modern sail drives is about the performance potential and the associated fuel savings. Transparent performance data is required to enable an economic prognosis for the use of Flettner rotors on ships. The Faculty of Maritime Sciences at Emden/ Leer University of Applied Sciences has developed an automatic control and monitoring system for Flettner rotors that also records extensive operating and environmental data. The data shows that all previous assumptions and model calculations are basically correct. With regard to the performance potential, the first series of measurements show even higher rotor forces compared with model calculations. This is a further benefit for Flettner rotor efficiency and could help the technology achieve a breakthrough as a building block for low-emission shipping.

FH Münster University of Applied Sciences / Vietnamese Social Sciences

2021 ◽  
Author(s):  
H.L. Cu Si
Keyword(s):  
Social Sciences ◽  
Applied Sciences ◽  
The Road ◽  
University Of Applied Sciences

FH Münster University of Applied Sciences; Lib holding: Item - The Vietnamese Social Sciences at a Fork in the Road

URANS Simulations and Experimental Investigations on Unsteady Aerodynamic Effects in the Blade Tip Region of a Shrouded Fan Configuration

2017 ◽  
Author(s):  
Gi-Don Na ◽  
Frank Kameier ◽  
Nils Springer ◽  
Michael Mauß ◽  
C. O. Paschereit
Keyword(s):  
Applied Sciences ◽  
Numerical Simulations ◽  
Aerodynamic Performance ◽  
Design Parameters ◽  
Experimental Investigations ◽  
Acoustic Measurements ◽  
Noise Emission ◽  
Industrial Partner ◽  
University Of Applied Sciences ◽  
Blade Tip

The acoustical characteristics of cooling fans are an essential criterion of product quality in the automotive industry. Fan modules have to suffice growing customer expectations which are reflected in the comfort requirements set by car manufacturers around the world. In order to locate dominant acoustic sources and to reduce the noise emission generated by a shrouded fan configuration, numerical simulations and experimental investigations are performed. The working approach considers variously modified fan geometries and their evaluation regarding arising vortex flow phenomena and their effect on a decreased sound pressure level (SPL) in consideration of an improvement or the constancy of aerodynamic fan performance. Particular emphasis lies on the analysis of secondary flows in the blade tip region by post-processing CFD-results. Due to the large number of geometrical modifications investigated and the importance of highly resolved eddy structures, a hybrid approach is chosen by applying the SAS-SST turbulence model in URANS simulations. The SAS (Scale Adaptive Simulation) delivers LES (Large Eddy Simulation) content in unsteady regions of a RANS-simulation and exhibits not nearly the high computational effort needed to perform a full scale LES. An assessment of the actual propagation of noise emission into the far-field is made by performing experimental investigations on the most promising modifications. The acoustic measurements are carried out in a fan test stand in the anechoic chamber of Duesseldorf University of Applied Sciences. The aerodynamic performance is measured in a fan test rig with an inlet chamber setup in accordance to ISO 5801. The measured acoustical and aerodynamic performances are validated by the industrial partner. The results of the acoustic measurements are in turn utilized to determine indicators of noise radiation in the numerical simulation. Within this work an innovative geometry modification is presented which can be implemented into shrouded fan configurations with backward-skewed blades. The new design exhibits a reduced SPL (A-weighted) of approx. 4 dB over the entire operating range while showing no significant deterioration on the aerodynamic performance. While the design was registered for patent approval cooperatively by the industrial partner and Duesseldorf University of Applied Sciences, further investigations regarding variations of design parameters are performed and presented in this paper. All numerical simulations are performed with ANSYS CFX, a commercial solver widely spread in the industry. Methods similar to those shown in this work can be implemented in the design phase of axial fans in order to develop acoustically optimized fan geometries.

scholarly journals Auditing in a Family-Centered Higher Education Institution: The German Experience of Implementation

2021 ◽  
Vol 21 (3) ◽  
pp. 21-25
Author(s):  
Susanne Maier ◽  
Keyword(s):  
Applied Sciences ◽  
Higher Education ◽  
Public Administration ◽  
Education Institution ◽  
Working Environment ◽  
Family Friendly ◽  
The Family ◽  
University Of Applied Sciences ◽  
The University ◽  
Family Centered

The family-friendly university audit (“audit familiengerechte hochschule”) is studied. The audit is available to German universities in order to support a familyfriendly working environment. Practices of an auditor coordinating several workshops for rectorate, HR department and functionaries, as well as representatives of all university groups are considered. The experience of the auditing at the University of Applied Sciences – Public Administration and Finance, Ludwigsburg is analyzed.

scholarly journals COMPARATIVE GEOMETRICAL INVESTIGATIONS OF HAND-HELD SCANNING SYSTEMS

2016 ◽  
Vol XLI-B5 ◽  
pp. 507-514 ◽  
Author(s):  
T. P. Kersten ◽  
H.-J. Przybilla ◽  
M. Lindstaedt ◽  
F. Tschirschwitz ◽  
M. Misgaiski-Hass
Keyword(s):  
Applied Sciences ◽  
Laser Scanning ◽  
Reference Data ◽  
Test Results ◽  
University Of Applied Sciences ◽  
Humboldt University ◽  
Comprehensive Test ◽  
Structure Sensor ◽  
Scanning Systems ◽  
Test Scenarios

An increasing number of hand-held scanning systems by different manufacturers are becoming available on the market. However, their geometrical performance is little-known to many users. Therefore the Laboratory for Photogrammetry & Laser Scanning of the HafenCity University Hamburg has carried out geometrical accuracy tests with the following systems in co-operation with the Bochum University of Applied Sciences (Laboratory for Photogrammetry) as well as the Humboldt University in Berlin (Institute for Computer Science): DOTProduct DPI-7, Artec Spider, Mantis Vision F5 SR, Kinect v1 + v2, Structure Sensor and Google’s Project Tango. In the framework of these comparative investigations geometrically stable reference bodies were used. The appropriate reference data were acquired by measurement with two structured light projection systems (AICON smartSCAN and GOM ATOS I 2M). The comprehensive test results of the different test scenarios are presented and critically discussed in this contribution.

Sign in / Sign up

Export Citation Format

Share Document