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Article
Publication date: 3 March 2020

Michal Kulak, Michal Lipian and Karol Zawadzki

This paper aims to discuss the results of the performance study of wind turbine blades equipped with winglets. An investigation focusses on small wind turbines (SWTs), where the…

235

Abstract

Purpose

This paper aims to discuss the results of the performance study of wind turbine blades equipped with winglets. An investigation focusses on small wind turbines (SWTs), where the winglets are recalled as one of the most promising concepts in terms of turbine efficiency increase.

Design/methodology/approach

To investigate a contribution of winglets to SWT aerodynamic efficiency, a wind tunnel experiment was performed at Lodz University of Technology. In parallel, computational fluid dynamics (CFD) simulations campaign was conducted with the ANSYS CFX software to investigate appearing flow structures in greater detail.

Findings

The research indicates the potential behind the application of winglets in low Reynolds flow conditions, while the CFD study enables the identification of crucial regions influencing the flow structure in the most significant degree.

Research limitations/implications

As the global effect on a whole rotor is a result of a small-scale geometrical feature, it is important to localise unveiled phenomena and the mechanisms behind their generation.

Practical implications

Even the slightest efficiency improvement in a distributed generation installation can promote such a solution amongst energy prosumers and increase their independence from limited natural resources.

Originality/value

The winglet-equipped blades of SWTs provide an opportunity to increase the device performance with relatively low cost and ease of implementation.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 31 no. 2
Type: Research Article
ISSN: 0961-5539

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Article
Publication date: 1 January 1977

Americus

Industrial progress is in large measure a function of the scientific understandings inherent in a given body of technology. It is, of course, true that technology can be developed…

26

Abstract

Industrial progress is in large measure a function of the scientific understandings inherent in a given body of technology. It is, of course, true that technology can be developed empirically and much of it has been. It is also true, however, that technology based on scientific understandings is in practically every instance more effective. If only empiricism is involved there inevitably comes a time when technological progress ceases. It is for this reason that scientific studies in the coatings industry must be continually encouraged.

Details

Pigment & Resin Technology, vol. 6 no. 1
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 4 August 2014

Karol Malecha, Marek Dawgul and Dorota G Pijanowska

The purpose of this paper is to focus on development and electrical characterization of miniature ion-selective electrode (ISE) for application in micro total analysis system or…

146

Abstract

Purpose

The purpose of this paper is to focus on development and electrical characterization of miniature ion-selective electrode (ISE) for application in micro total analysis system or lab-on-chip devices. The presented ISE is made using low temperature co-fired ceramics (LTCC). It shows possibility of integration chemically sensitive layers with structures fabricated using modern microelectronic technology.

Design/methodology/approach

The presented ISEs were fabricated using LTCC microelectronic technology. The possibility of ISE fabrication on multilayer ceramic substrate made of two different LTCC material systems (CeramTec GC, Du Pont 951) with deposited thick-film silver pad is studied. Different configurations of LTCC/silver pad (surface, embedded) are taken into account. Electrical performance of all LTCC-based structures with integrated ISE was examined experimentally.

Findings

The preliminary measurements made for ammonium ions have shown good repeatability and linear response with slope of about 30-35 mV/dec. Moreover, no significant impact of the LTCC material system and silver pad configuration on fabricated ISEs’ electrical properties was noticed.

Research limitations/implications

The presented research is a preliminary work. The authors focused on ISE fabrication on LTCC substrates without any microfluidic structures. Therefore, further research work will be needed to evolve ion-selective membrane deposition inside microfluidic structures made in LTCC substrates.

Practical implications

Development of the LTCC-based ISE makes the fabrication of detection units for integrated microfluidic systems possible. These devices can find practical applications in analytical diagnosis and continuous monitoring of various biochemical parameters.

Originality/value

This paper shows design, fabrication and performance of the novel ISE fabrication using LTCC technology.

Details

Microelectronics International, vol. 31 no. 3
Type: Research Article
ISSN: 1356-5362

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