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Experimental Energy Recovery from a Backpack Using Various Harvester Concepts

Kęcik Krzysztof

Advances in Science and Technology. Research Journal

2024

Vol. 18, no 3

67--78

Energy harvesting from human body kinetics is a crucial issue. The primary challenge lies in designing and optimizing the energy converter. This paper presents an analysis of energy harvesting using three variants of electromagnetic harvesters designed for backpack integration. The first harvester comprises a single levitating magnet within a coil. The second concept involves a specially designed oscillating magnet consisting of two divided magnets with a separator. The third harvester variant utilizes two levitating magnets within the coil. The results indicate that, for harmonic excitation, the harvested power is the highest for the classical harvester with a single oscillating magnet. However, when integrated into a backpack, the concept of two levitating magnets proves to be more effective in lower speed ranges.

The influence of milling parameters on the surface roughness of glass and carbon fiber reinforced plastics

Ciecieląg Krzysztof, Zaleski Kazimierz, Kęcik Krzysztof

Mechanik

2019

R. 92, nr 10

649--651

In this paper, the impact of milling process parameters on the roughness of surface of glass and carbon fiber reinforced plastics was analyzed. The influence of feed per tooth, cutting speed and depth of cut on selected surface roughness parameters was determined. It was found that the surface roughness after milling carbon fiber reinforced plastics was greater compared to the surface of glass fiber reinforced plastics.

Przeanalizowano wpływ parametrów technologicznych frezowania na chropowatość powierzchni kompozytów polimerowych z włóknami szklanymi i węglowymi. Określono wpływ posuwu na ostrze, prędkości skrawania i głębokości skrawania na wybrane parametry chropowatości powierzchni. Stwierdzono, że po frezowaniu chropowatość powierzchni kompozytów polimerowych z włóknami węglowymi była większa niż powierzchni kompozytów z włóknami szklanymi.