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tom Vol. 1, Iss. 1
259--265
EN
The maritime environment protection is increasingly reflected in legal regulations regarding, inter alia, the harmful exhaust gas components emitted by marine combustion engines. The provisions imposing the emission limits for SOx, NOx and CO2 are included in MARPOL 73/78 Annex VI adopted by the International Maritime Organization (IMO). However, as of today, these provisions are not applicable to fishing cutters. One of the methods, both to decrease emissions’ volume and also to reduce the operating costs of ships, is to lower fuel consumption of marine energetic systems. The paper presents a proposition of energy-efficient and environmentally friendly energetic systems for coastal fishing cutters. It also demonstrates the importance of the said systems and includes the elaboration regarding the impact of fuel type, renewable energy sources and energy conversion methods on the hazards to the environment caused by the emission of harmful exhaust gas components. The presented solutions refer to fishing cutters of the length of 15-30 m and are categorized into two groups. The division criterion applied is an access to technologies currently available and future technologies enabling the use of alternative energy sources.
EN
This article presents an engineering design of a mechanical rack system along with strength analyses of its main load-bearer parts. The designed mechanical rack system is intended to be mounted in a production hall for storage of rod material with total length of 6 m. The whole structure of this equipment is welded and made of steel profiles. It consists of a main load-bearing part, which comprises a central beam and horizontal beams and four draw-out shelves on each side, which are arranged four levels. Every individual shelve is able to carry the mass of 3.0 t. As the solved rack system is not standardized but designed in compliance with specific requirements of a customer, we had to support the structure carrying capacity with strength calculations. Structural calculations were realized by means of numeric finite element method. Strength analyses were performed for the maximum load cases.
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Content available remote Heat regenerator of stirling engine with an unconventional mechanism FIK
61%
EN
The paper deals with the solution of the parts internal Stirling engine with an unconventional mechanism of FIK. I n order to increase its efficiency the internal engine includes the heat regenerator. I ts task is the accumulation of heat released from combustion chamber. I t is therefore necessary to consider its appropriate design and material solutions. This paper deals with the simulation of media flow through the regenerator made with Fluent software.
PL
W artykule przedstawiono rozwiązanie wewnętrznych części silnika Stirlinga z niekonwencjonalnym mechanizmem FIK. Aby zwiększyć jego skuteczność, wewnątrz silnika umieszczono regenerator ciepła. Jego zadaniem jest akumulacja ciepła wydzielanego z komory spalania. Konieczne jest zatem przeanalizowanie odpowiednich rozwiązań konstrukcyjnych i materiałowych. W artykule przedstawiono symulację przepływu czynników przez regenerator, wykonaną za pomocą programu Fluent.
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