Hidria Rotomatika

Spodnja Kanomlja, Slovenia

Hidria Rotomatika

Spodnja Kanomlja, Slovenia
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European shipments value of ventilation equipment is forecast to reach US$5 billion in 2017, from an estimated US$4.98 billion in 2012, further projected to reach above US$5.8 billion by 2022 registering a CAGR of 2.8% during 2017-2022 period. Driven by stringent regulations introduced by the European Union to reduce energy consumption in buildings, the European ventilation industry is expected to benefit from the increasing demand for energy efficient ventilation products. Modest but steady growth in construction activity in the residential and commercial sectors would enhance demand for ventilation equipment. Other factors, such as awareness about importance of indoor air quality would go a long way in renewing market demand. Overall outlook for shipments of ventilation equipment in Europe is expected to be picking up, although at a moderate pace. The report analyzes the European ventilation equipment shipments covering all of the 27 European Union countries with special focus on Czech Republic, Denmark, France, Germany, Italy, the Netherlands, Poland, Portugal, Spain, Sweden and the United Kingdom. Ventilation product segments analyzed in this study include Axial Fans, Centrifugal Fans, Cross Flow Fans, Domestic Exhaust Fans, Roof/Box Fans, Range Hoods and Air Handling Units (AHUs) for Ventilation. This report profiles 25 major market players and 47 other key players that are engaged in ventilation equipment production in Europe. The research also provides the listing of the companies engaged in the production of ventilation equipment in Europe. The list of companies covers the address, contact details and the website addresses of 287 companies. - New Hybrid Fan for Climate Control and Ventilation, RQM MultiEvo Introduced by Nicotra Gebhardt - Faber's Talika Hood Received the Red Dot Design Award for Best Product Design - Munters Developed New WM54 Fiberglass Fan Using Munters Drive Technology - Ziehl-Abegg Developed New ZAbluefin Radial Fan - ebm-papst Launched the RadiPac Series of Centrifugal Fans with a New Mechanical Design - X-TAIRMINAL, TROX's Newly Developed System to Manage Ventilation and Air Conditioning Systems - Launch of New RadiCal Centrifugal Fans in 3D Scroll Housings by ebm-papst - Alcedo SGR's Master Climate Solutions Group Acquired by Dantherm - Safegard Systems Acquired by Swegon Group - Unveiling of the Fiberglass Cone Vplus Fan with Permanent Magnet Motor by Multifan - ebm-papst showcases its latest energy-saving fans - Breathing Buildings Acquired by Volution Group - Vent-Axia Introduced the Next Generation of Mechanical Ventilation with Heat Recovery, Sentinel Kinetic Advance - Ziehl-Abegg to Relocate EC Production from Kunzelsau to Kupferzell - Launch of Ned Air Omni Line Series Air Handling Units - Munters AB Launches new EC52 motor fan - ebm-papst Developed AxiBlade Axial Fans for Every Pressure Range Applications - Flakt Woods and DencoHappel Merge to form FlaktGroup - Ruskin Air Management Ltd Acquired by Swegon - Acquisition of TTL Reinforces the Position of Systemair in Germany - Schonmann AG Acquired by Dantherm - Flakt Woods Introduced eCO Top Energy Recovery Units - 2VV Acquired by Systemair AB - Introduction of CIAT's Most Recent CLIMACIAT Product Range - Unveiling of TROX's FSL-U-ZAS Underfloor Unit - Acquisition of EXHAUSTO Boost the Growth of the ALDES Group in Northern Europe - Unveiling of Zehnder ComfoAir Q Model Range of Central Ventilation Units - New Centriflow 3D Mix Flow Impeller Launched by Flakt Woods - Launch of Ned Air EduComfort CM 1100 LN Decentralized HR Ventilation Unit with Heat Recovery - ebm-papst Offers RadiCal Centrifugal Fans for Clean Rooms - Swegon Reinforces its Presence on the German Market and in Residential Ventilation by Acquiring bluMartin - One-Half of the Air-Site AB's Shares Acquired by NIBE - EUROVENT Certificate Received by AMALVA for its KLASIK AHU Range - Nicotra Gebhardt's New Generation Roof Fans Outperforms ErP Directive - Introduction of Vent-Axia's New Sentinel Kinetic High Flow Model - Rosenberg Ventilatoren GmbH Unveils new MTC-MultiControl for EC-Fans - Munters AB Unveils MPX Exhaust Fans - ELTA Group Building Services Introduces Multiflow SEM and SEL Fan products - Volution Group Acquires Weland Luftbehandling AB - ebm-papst Launches 4300N DC Axial Fans - Munters AB to Acquire Reventa - Rosenberg Introduces EC Unoboxes ME, new Exhaust Unit - Ziehl-Abegg Launches ZAvblue Centrifugal Fan - Systemair Buys Air Handling Business from Kolektor - Lindab to Acquire Froid Partn'Air - Volution Group Completes Acquisition of Ventilair Group - Systemair AB to Acquire Menerga NV - ELTA Fans Accelerates its Production Capacities - Lindab to Acquire IMP Klima - Vent Axia Launches Silent Fan - Flakt Woods Launches JMv Aerofoil Axial Flow Fan - Vent-Axia Introduces the 200ZP series Ventilation solution - BerlinerLuft Group Expands in Europe - Systemair AB Acquires Menerga AS - DencoHappel Launches COM4plus Universal Air Handling Solution - DencoHappel Unveils ATpicco Air Handling Unit - Centrotec Acquires PRO-KLIMA d.o.o - Ziehl-Abegg Develops New Energy-Saving EC055 Motors - Brink Develops Air 70, a New Ventilation System - Torin-Sifan Establishes New EC Manufacturing & Technology Centre in Swindon - Fantech Introduces EC Fans 1. Czech Republic 2. Denmark 3. France 4. Germany 5. Italy 6. The Netherlands 7. Poland 8. Portugal 9. Spain 10. Sweden 11. The United Kingdom 12. Rest of Europe Part C: Guide to the Industry - AL-KO Therm GmbH (Germany) - AZ KLIMA, a. s. (Czech Republic) - Aermec S.p.A (Italy) - Airflow Developments Limited (United Kingdom) - Airforce S.p.A (Italy) - Aldes Group - Aldes Group (France) - Amalva UAB (Lithuania) - BerlinerLuft. Technik GmbH (Germany) - Best S.p.A (Italy) - Delta Neu S.A.S (France) - ebm-papst Mulfingen GmbH & Co. KG - Elica S.p.A. - Elta Group - Hamon D'Hondt SA (France) - Helios Ventilatoren Gmbh + Co., Kg. - Hidria Rotomatika d.o.o. - Howden Group Ltd - Munters AB - NIBE Energy Systems (Sweden) - Remak A.S. (Czech Republic) - SIG Air Handling International (Belgium) - STIEBEL ELTRON GmbH & Co. KG (Germany) - Sodeca S.L.U. (Spain) - Soler & Palau Sistemas De Ventilacion, S.L.U. - Swegon AB - Systemair AB - TLT-Turbo GmbH (Germany) - TROGES Luftungstechnik (Austria) - TROX GmbH - Volution Group plc - Vortice Elettrosociali S.p.A (Italy) - Vostermans Ventilation B.V. (Netherlands) - Zehnder Group AG - Ziehl-Abegg SE For more information about this report visit http://www.researchandmarkets.com/research/j2sj5h/ventilation To view the original version on PR Newswire, visit:http://www.prnewswire.com/news-releases/european-ventilation-equipment-market-2022---driven-by-stringent-regulations-introduced-by-the-european-union---research-and-markets-300464996.html


News Article | May 25, 2017
Site: globenewswire.com

Dublin, May 25, 2017 (GLOBE NEWSWIRE) -- Research and Markets has announced the addition of the "Ventilation Equipment - A European Market Overview" report to their offering. European shipments value of ventilation equipment is forecast to reach US$5 billion in 2017, from an estimated US$4.98 billion in 2012, further projected to reach above US$5.8 billion by 2022 registering a CAGR of 2.8% during 2017-2022 period. Driven by stringent regulations introduced by the European Union to reduce energy consumption in buildings, the European ventilation industry is expected to benefit from the increasing demand for energy efficient ventilation products. Modest but steady growth in construction activity in the residential and commercial sectors would enhance demand for ventilation equipment. Other factors, such as awareness about importance of indoor air quality would go a long way in renewing market demand. Overall outlook for shipments of ventilation equipment in Europe is expected to be picking up, although at a moderate pace. The report analyzes the European ventilation equipment shipments covering all of the 27 European Union countries with special focus on Czech Republic, Denmark, France, Germany, Italy, the Netherlands, Poland, Portugal, Spain, Sweden and the United Kingdom. Ventilation product segments analyzed in this study include Axial Fans, Centrifugal Fans, Cross Flow Fans, Domestic Exhaust Fans, Roof/Box Fans, Range Hoods and Air Handling Units (AHUs) for Ventilation. This report profiles 25 major market players and 47 other key players that are engaged in ventilation equipment production in Europe. The research also provides the listing of the companies engaged in the production of ventilation equipment in Europe. The list of companies covers the address, contact details and the website addresses of 287 companies. Key Business & Product Trends - New Hybrid Fan for Climate Control and Ventilation, RQM MultiEvo Introduced by Nicotra Gebhardt - Faber's Talika Hood Received the Red Dot Design Award for Best Product Design - Munters Developed New WM54 Fiberglass Fan Using Munters Drive Technology - Ziehl-Abegg Developed New ZAbluefin Radial Fan - ebm-papst Launched the RadiPac Series of Centrifugal Fans with a New Mechanical Design - X-TAIRMINAL, TROX's Newly Developed System to Manage Ventilation and Air Conditioning Systems - Launch of New RadiCal Centrifugal Fans in 3D Scroll Housings by ebm-papst - Alcedo SGR's Master Climate Solutions Group Acquired by Dantherm - Safegard Systems Acquired by Swegon Group - Unveiling of the Fiberglass Cone Vplus Fan with Permanent Magnet Motor by Multifan - ebm-papst showcases its latest energy-saving fans - Breathing Buildings Acquired by Volution Group - Vent-Axia Introduced the Next Generation of Mechanical Ventilation with Heat Recovery, Sentinel Kinetic Advance - Ziehl-Abegg to Relocate EC Production from Kunzelsau to Kupferzell - Launch of Ned Air Omni Line Series Air Handling Units - Munters AB Launches new EC52 motor fan - ebm-papst Developed AxiBlade Axial Fans for Every Pressure Range Applications - Flakt Woods and DencoHappel Merge to form FlaktGroup - Ruskin Air Management Ltd Acquired by Swegon - Acquisition of TTL Reinforces the Position of Systemair in Germany - Schonmann AG Acquired by Dantherm - Flakt Woods Introduced eCO Top Energy Recovery Units - 2VV Acquired by Systemair AB - Introduction of CIAT's Most Recent CLIMACIAT Product Range - Unveiling of TROX's FSL-U-ZAS Underfloor Unit - Acquisition of EXHAUSTO Boost the Growth of the ALDES Group in Northern Europe - Unveiling of Zehnder ComfoAir Q Model Range of Central Ventilation Units - New Centriflow 3D Mix Flow Impeller Launched by Flakt Woods - Launch of Ned Air EduComfort CM 1100 LN Decentralized HR Ventilation Unit with Heat Recovery - ebm-papst Offers RadiCal Centrifugal Fans for Clean Rooms - Swegon Reinforces its Presence on the German Market and in Residential Ventilation by Acquiring bluMartin - One-Half of the Air-Site AB's Shares Acquired by NIBE - EUROVENT Certificate Received by AMALVA for its KLASIK AHU Range - Nicotra Gebhardt's New Generation Roof Fans Outperforms ErP Directive - Introduction of Vent-Axia's New Sentinel Kinetic High Flow Model - Rosenberg Ventilatoren GmbH Unveils new MTC-MultiControl for EC-Fans - Munters AB Unveils MPX Exhaust Fans - ELTA Group Building Services Introduces Multiflow SEM and SEL Fan products - Volution Group Acquires Weland Luftbehandling AB - ebm-papst Launches 4300N DC Axial Fans - Munters AB to Acquire Reventa - Rosenberg Introduces EC Unoboxes ME, new Exhaust Unit - Ziehl-Abegg Launches ZAvblue Centrifugal Fan - Systemair Buys Air Handling Business from Kolektor - Lindab to Acquire Froid Partn'Air - Volution Group Completes Acquisition of Ventilair Group - Systemair AB to Acquire Menerga NV - ELTA Fans Accelerates its Production Capacities - Lindab to Acquire IMP Klima - Vent Axia Launches Silent Fan - Flakt Woods Launches JMv Aerofoil Axial Flow Fan - Vent-Axia Introduces the 200ZP series Ventilation solution - BerlinerLuft Group Expands in Europe - Systemair AB Acquires Menerga AS - DencoHappel Launches COM4plus Universal Air Handling Solution - DencoHappel Unveils ATpicco Air Handling Unit - Centrotec Acquires PRO-KLIMA d.o.o - Ziehl-Abegg Develops New Energy-Saving EC055 Motors - Brink Develops Air 70, a New Ventilation System - Torin-Sifan Establishes New EC Manufacturing & Technology Centre in Swindon - Fantech Introduces EC Fans 1. Czech Republic 2. Denmark 3. France 4. Germany 5. Italy 6. The Netherlands 7. Poland 8. Portugal 9. Spain 10. Sweden 11. The United Kingdom 12. Rest of Europe Part C: Guide to the Industry Part D: Annexure - AL-KO Therm GmbH (Germany) - AZ KLIMA, a. s. (Czech Republic) - Aermec S.p.A (Italy) - Airflow Developments Limited (United Kingdom) - Airforce S.p.A (Italy) - Aldes Group - Aldes Group (France) - Amalva UAB (Lithuania) - BerlinerLuft. Technik GmbH (Germany) - Best S.p.A (Italy) - Delta Neu S.A.S (France) - ebm-papst Mulfingen GmbH & Co. KG - Elica S.p.A. - Elta Group - Hamon D'Hondt SA (France) - Helios Ventilatoren Gmbh + Co., Kg. - Hidria Rotomatika d.o.o. - Howden Group Ltd - Munters AB - NIBE Energy Systems (Sweden) - Remak A.S. (Czech Republic) - SIG Air Handling International (Belgium) - STIEBEL ELTRON GmbH & Co. KG (Germany) - Sodeca S.L.U. (Spain) - Soler & Palau Sistemas De Ventilacion, S.L.U. - Swegon AB - Systemair AB - TLT-Turbo GmbH (Germany) - TROGES Luftungstechnik (Austria) - TROX GmbH - Volution Group plc - Vortice Elettrosociali S.p.A (Italy) - Vostermans Ventilation B.V. (Netherlands) - Zehnder Group AG - Ziehl-Abegg SE For more information about this report visit http://www.researchandmarkets.com/research/z23ghq/ventilation


News Article | May 25, 2017
Site: globenewswire.com

Dublin, May 25, 2017 (GLOBE NEWSWIRE) -- Research and Markets has announced the addition of the "Ventilation Equipment - A European Market Overview" report to their offering. European shipments value of ventilation equipment is forecast to reach US$5 billion in 2017, from an estimated US$4.98 billion in 2012, further projected to reach above US$5.8 billion by 2022 registering a CAGR of 2.8% during 2017-2022 period. Driven by stringent regulations introduced by the European Union to reduce energy consumption in buildings, the European ventilation industry is expected to benefit from the increasing demand for energy efficient ventilation products. Modest but steady growth in construction activity in the residential and commercial sectors would enhance demand for ventilation equipment. Other factors, such as awareness about importance of indoor air quality would go a long way in renewing market demand. Overall outlook for shipments of ventilation equipment in Europe is expected to be picking up, although at a moderate pace. The report analyzes the European ventilation equipment shipments covering all of the 27 European Union countries with special focus on Czech Republic, Denmark, France, Germany, Italy, the Netherlands, Poland, Portugal, Spain, Sweden and the United Kingdom. Ventilation product segments analyzed in this study include Axial Fans, Centrifugal Fans, Cross Flow Fans, Domestic Exhaust Fans, Roof/Box Fans, Range Hoods and Air Handling Units (AHUs) for Ventilation. This report profiles 25 major market players and 47 other key players that are engaged in ventilation equipment production in Europe. The research also provides the listing of the companies engaged in the production of ventilation equipment in Europe. The list of companies covers the address, contact details and the website addresses of 287 companies. Key Business & Product Trends - New Hybrid Fan for Climate Control and Ventilation, RQM MultiEvo Introduced by Nicotra Gebhardt - Faber's Talika Hood Received the Red Dot Design Award for Best Product Design - Munters Developed New WM54 Fiberglass Fan Using Munters Drive Technology - Ziehl-Abegg Developed New ZAbluefin Radial Fan - ebm-papst Launched the RadiPac Series of Centrifugal Fans with a New Mechanical Design - X-TAIRMINAL, TROX's Newly Developed System to Manage Ventilation and Air Conditioning Systems - Launch of New RadiCal Centrifugal Fans in 3D Scroll Housings by ebm-papst - Alcedo SGR's Master Climate Solutions Group Acquired by Dantherm - Safegard Systems Acquired by Swegon Group - Unveiling of the Fiberglass Cone Vplus Fan with Permanent Magnet Motor by Multifan - ebm-papst showcases its latest energy-saving fans - Breathing Buildings Acquired by Volution Group - Vent-Axia Introduced the Next Generation of Mechanical Ventilation with Heat Recovery, Sentinel Kinetic Advance - Ziehl-Abegg to Relocate EC Production from Kunzelsau to Kupferzell - Launch of Ned Air Omni Line Series Air Handling Units - Munters AB Launches new EC52 motor fan - ebm-papst Developed AxiBlade Axial Fans for Every Pressure Range Applications - Flakt Woods and DencoHappel Merge to form FlaktGroup - Ruskin Air Management Ltd Acquired by Swegon - Acquisition of TTL Reinforces the Position of Systemair in Germany - Schonmann AG Acquired by Dantherm - Flakt Woods Introduced eCO Top Energy Recovery Units - 2VV Acquired by Systemair AB - Introduction of CIAT's Most Recent CLIMACIAT Product Range - Unveiling of TROX's FSL-U-ZAS Underfloor Unit - Acquisition of EXHAUSTO Boost the Growth of the ALDES Group in Northern Europe - Unveiling of Zehnder ComfoAir Q Model Range of Central Ventilation Units - New Centriflow 3D Mix Flow Impeller Launched by Flakt Woods - Launch of Ned Air EduComfort CM 1100 LN Decentralized HR Ventilation Unit with Heat Recovery - ebm-papst Offers RadiCal Centrifugal Fans for Clean Rooms - Swegon Reinforces its Presence on the German Market and in Residential Ventilation by Acquiring bluMartin - One-Half of the Air-Site AB's Shares Acquired by NIBE - EUROVENT Certificate Received by AMALVA for its KLASIK AHU Range - Nicotra Gebhardt's New Generation Roof Fans Outperforms ErP Directive - Introduction of Vent-Axia's New Sentinel Kinetic High Flow Model - Rosenberg Ventilatoren GmbH Unveils new MTC-MultiControl for EC-Fans - Munters AB Unveils MPX Exhaust Fans - ELTA Group Building Services Introduces Multiflow SEM and SEL Fan products - Volution Group Acquires Weland Luftbehandling AB - ebm-papst Launches 4300N DC Axial Fans - Munters AB to Acquire Reventa - Rosenberg Introduces EC Unoboxes ME, new Exhaust Unit - Ziehl-Abegg Launches ZAvblue Centrifugal Fan - Systemair Buys Air Handling Business from Kolektor - Lindab to Acquire Froid Partn'Air - Volution Group Completes Acquisition of Ventilair Group - Systemair AB to Acquire Menerga NV - ELTA Fans Accelerates its Production Capacities - Lindab to Acquire IMP Klima - Vent Axia Launches Silent Fan - Flakt Woods Launches JMv Aerofoil Axial Flow Fan - Vent-Axia Introduces the 200ZP series Ventilation solution - BerlinerLuft Group Expands in Europe - Systemair AB Acquires Menerga AS - DencoHappel Launches COM4plus Universal Air Handling Solution - DencoHappel Unveils ATpicco Air Handling Unit - Centrotec Acquires PRO-KLIMA d.o.o - Ziehl-Abegg Develops New Energy-Saving EC055 Motors - Brink Develops Air 70, a New Ventilation System - Torin-Sifan Establishes New EC Manufacturing & Technology Centre in Swindon - Fantech Introduces EC Fans 1. Czech Republic 2. Denmark 3. France 4. Germany 5. Italy 6. The Netherlands 7. Poland 8. Portugal 9. Spain 10. Sweden 11. The United Kingdom 12. Rest of Europe Part C: Guide to the Industry Part D: Annexure - AL-KO Therm GmbH (Germany) - AZ KLIMA, a. s. (Czech Republic) - Aermec S.p.A (Italy) - Airflow Developments Limited (United Kingdom) - Airforce S.p.A (Italy) - Aldes Group - Aldes Group (France) - Amalva UAB (Lithuania) - BerlinerLuft. Technik GmbH (Germany) - Best S.p.A (Italy) - Delta Neu S.A.S (France) - ebm-papst Mulfingen GmbH & Co. KG - Elica S.p.A. - Elta Group - Hamon D'Hondt SA (France) - Helios Ventilatoren Gmbh + Co., Kg. - Hidria Rotomatika d.o.o. - Howden Group Ltd - Munters AB - NIBE Energy Systems (Sweden) - Remak A.S. (Czech Republic) - SIG Air Handling International (Belgium) - STIEBEL ELTRON GmbH & Co. KG (Germany) - Sodeca S.L.U. (Spain) - Soler & Palau Sistemas De Ventilacion, S.L.U. - Swegon AB - Systemair AB - TLT-Turbo GmbH (Germany) - TROGES Luftungstechnik (Austria) - TROX GmbH - Volution Group plc - Vortice Elettrosociali S.p.A (Italy) - Vostermans Ventilation B.V. (Netherlands) - Zehnder Group AG - Ziehl-Abegg SE For more information about this report visit http://www.researchandmarkets.com/research/z23ghq/ventilation


Cesnik D.,Hidria Rotomatika | Bratus V.,Hidria AET
HTM - Journal of Heat Treatment and Materials | Year: 2013

The distortion of steel flat ring type products after fine-blanking and subsequent carbonitriding was investigated. All the analyzed products were produced from the same coil and under the same conditions of fine-blanking. The fine blanked products were afterwards heat treated by using three different procedures - carbonitriting, stress relief annealing and heat treatment in a neutral atmosphere under the same temperature regime as for carbonitriding. The contribution of fine-blanking, relief of residual stresses, uneven heating and cooling and the formation of carbonitrided cases on the overall distortion were determined. The results were complemented with hardness measurements, residual stresses measurements and observations of microstructure. The presented research work is the first step towards the understanding of the mechanisms and factors that influence the quality of the final products during the production cycle. © 2013 Carl Hanser Verlag, München.


Cebron M.,Hidria Rotomatika | Kosel F.,University of Ljubljana
Strojniski Vestnik/Journal of Mechanical Engineering | Year: 2014

Stored energy analyses by differential scanning calorimetry (DSC) and indentation hardness measurement were performed on crosssectional samples cut from the gauge length of tensile-deformed copper specimens. The stress-strain curve was described using dislocationbased hardening models integrated into a visco-plastic Taylor-type model of polycrystal deformation. Three approaches in reproducing the experimental stress-strain curve were used to evaluate the differences in dislocation density predictions resulting from different modelling options. A good description of hardening was achieved by all three approaches and constitutive models and only negligible differences were found in the predicted dislocation density between assumed homogeneous and heterogeneous dislocation distribution throughout the polycrystal. Measured values of stored energy are somewhat lower than those published in research studies in which one-step and slow annealing methods were used. A simple model predicting a nearly linear increase of stored energy with dislocation density was found to adequately describe retained energy evolution. Since different dislocation arrangements result in different yield stress and energy predictions, both results can be used to determine values of parameters in two-internal-variable hardening models. Even though both measured quantities were satisfyingly described, uncertainties regarding material parameters and the applied polycrystal and stored energy models prevent us from claiming that the evaluated dislocation density distributions represent the actual dislocation structure in the material. As expected for strongly hardening materials, the relationship between yield stress and hardness could not be adequately approximated by a linear function. Instead, a linear combination of yield stress and hardening rate was used, finally providing a relation between hardness and stored energy through their mutual dependence on yield stress. © 2014 Journal of Mechanical Engineering. All rights reserved.


Bizjan B.,University of Ljubljana | Milavec M.,Hidria Rotomatika | Sirok B.,University of Ljubljana | Trenc F.,University of Ljubljana | Hocevar M.,University of Ljubljana
Journal of Sound and Vibration | Year: 2016

A study of velocity and pressure fluctuations in the tip clearance flow of an axial fan is presented in this paper. Two different rotor blade tip designs were investigated: the standard one with straight blade tips and the modified one with swept-back tip winglets. Comparison of integral sound parameters indicates a significant noise level reduction for the modified blade tip design. To study the underlying mechanisms of the energy conversion and noise generation, a novel experimental method based on simultaneous measurements of local flow velocity and pressure has also been developed and is presented here. The method is based on the phase space analysis by the use of attractors, which enable more accurate identification and determination of the local flow structures and turbulent flow properties. Specific gap flow energy derived from the pressure and velocity time series was introduced as an additional attractor parameter to assess the flow energy distribution and dissipation within the phase space, and thus determines characteristic sources of the fan acoustic emission. The attractors reveal a more efficient conversion of the pressure to kinetic flow energy in the case of the modified (tip winglet) fan blade design, and also a reduction in emitted noise levels. The findings of the attractor analysis are in a good agreement with integral fan characteristics (efficiency and noise level), while offering a much more accurate and detailed representation of gap flow phenomena. © 2016 Elsevier Ltd.


Bolka S.,Hidria Rotomatika | Slavic J.,University of Ljubljana | Boltezar M.,University of Ljubljana
Strojniski Vestnik/Journal of Mechanical Engineering | Year: 2015

The mechanical characteristics of sheet metals are typically identified in the in-plane direction, although the sheet-metal forming processes (e.g., blanking, deep-drawing) are normally applied in the out-of-plane direction. As the mechanical characteristics are not necessarily constant, their direct experimental evaluation through the forming process would enable material monitoring and process optimization, and, additionally, material characterization in the out-of-plane direction. Full, partial (to a certain depth) and sequential (consecutive partial steps to full penetration) blanking experiments are performed on a laboratory blanking apparatus to correlate the out-of-plane material characteristics with the in-plane ones. The well-established in-plane approach to damage is introduced for the out-of-plane direction to determine the isotropic Lemaitre damage variable. Furthermore, yield and ultimate shear stresses are determined and correlated to their respective in-plane counterparts, offering a new insight in the sheet-metal blanking process. © 2015 Journal of Mechanical Engineering. All rights reserved.


Kontarcek A.,Hidria AET | Bajec P.,Hidria Rotomatika | Nemec M.,University of Ljubljana | Ambrozic V.,University of Ljubljana | Nedeljkovic D.,University of Ljubljana
IEEE Transactions on Industrial Electronics | Year: 2015

This paper presents a low-cost fault-tolerant system for open-phase fault (OPF) in a power-converter-fed permanent-magnet synchronous machine. The proposed fault-tolerant system is based on field orientation control with additional fault tolerance functionality. A current predictive method for OPF detection is presented, together with an estimation of the threshold level for detection. The proposed method is based on the prediction of stator current for the next sampling interval. Furthermore, a new method for postfault operation of the machine is proposed. For optimal performance of the complete drive, a prefiring angle is introduced in order to avoid the temporary generation of negative torque. This improvement increases the average generated postfault electromagnetic torque, and consequently, it reduces the mechanical stress on various machine parts. The proposed fault detection and postfault operation solutions were simulated in MATLAB, and they were also tested on an experimental setup. The results show several advantages of the proposed fault-tolerant solution, like its short fault-detection time, substantial robustness against variation of machine parameters or load fluctuations, and negligible implementation costs, since no hardware modifications are needed. The fault detection algorithm does not require high computing power, and it operates well even during transients. © 1982-2012 IEEE.

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