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1

Power efficiency of power plants on trailing suction hopper dredgers

Bocheński D.

Journal of Polish CIMEEAC

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2016

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Vol. 11, no 1

7--12

EN

This paper presents the notion of operational power efficiency and compares it with the classical definition of power efficiency. There are presented also calculation results of power efficiency for a selected suction hopper dredger and also influence of power system type of suction hopper dredger on magnitude of power efficiency of its power plant has been highlighted.

2

Influence of dredger power plant type and dredger size on output of power plant installed on trailing suction hopper dredger

Bocheński D.

Journal of Polish CIMEEAC

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2015

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Vol. 10, no 1

17--21

EN

This paper presents results of investigations dealing with influence of parameters characterizing size of trailing suction hopper dredger as well as type of power system on magnitude of total output of combustion engines installed in dredger power plant.

3

Analysis of changeability of operational loads of main engines on dredgers

Bocheński D.

Journal of Polish CIMAC

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2011

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Vol. 6, no 1

17-24

EN

This paper presents an analysis of changeability of operational loads of main engines and power consumers on dredgers of three basic types. The principles of processing measurement results, which should be used for statistical analysis of operational loads of dredger main engines and power consumers, have been formulated.

4

Analysis of pssibility and purposefulness of application of waste-heat boilers to trailing suction hopper dredgers

Bocheński D.

Journal of Polish CIMAC

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2010

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Vol. 5, no 1

23-32

EN

This paper presents an analysis of possibility and purposefulness of application of waste-heat boilers to trailing suction hopper dredgers. Using results of own operational research on dredgers this author determined thermal power demand for six hypothetical trailing suction hopper dredgers of various size, at accounting for a type of power system and kind of fuel combusted by dredger’s power plant. By means of basic indices of economical analysis it was determined under which conditions the application of waste-heat boilers to suction hopper dredgers is economically justified.

5

Eksploatacyjne obciążenia śrub napędowych pogłębiarek różnych typów w podstawowych stanach ich eksploatacji

Bocheński D.

Zeszyty Naukowe / Akademia Morska w Szczecinie

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2009

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nr 17 (89)

14-19

PL

Artykuł przedstawia wyniki badań eksploatacyjnych dotyczących jednego z najważniejszych odbiorników energii mechanicznej na pogłębiarkach: śrub napędowych. Badania eksploatacyjne obejmowały pomiary parametrów charakteryzujących obciążenia śrub napędowych pogłębiarek w dwóch podstawowych stanach ich eksploatacji: robotach pogłębiarskich i pływaniu swobodnym. Przedstawione w pracy wyniki obejmują 10 pogłębiarek, w tym 8 pogłębiarek ssących nasiębiernych i 2 pogłębiarki wieloczerpakowe. Scharakteryzowano rozkłady obciążeń śrub napędowych, biorąc pod uwagę m.in. wartości średnie, odchylenie standardowe i współczynniki zmienności rozkładu obciążeń. Przedstawiono przykładowe histogramy obciążeń śrub na wybranych pogłębiarkach w badanych okresach czasu. Sformułowano wnioski odnośnie wartości średnich obciążeń śrub oraz współczynników zmienności rozkładu obciążeń. Wyniki przedstawione w pracy będą wy-korzystane przy tworzeniu modeli losowych opisujących rzeczywiste warunki eksploatacji elementów układów energetycznych pogłębiarek.

EN

The article presents results of operation investigations regarding one of the most important receivers of mechanical energy on dredgers: propellers. Operation investigations covered measurements of characteristic parameters of loading propellers on dredgers in two basic conditions of their work: dredging works and sailing at sea. Presented results are based on 10 dredgers (8 trailing suction hopper dredgers and 2 bucket dredgers). In the paper characteristics of spread of propellers loading, i.e. average value, standard deviation and coefficients of variations of loading spred are presented. Examples of load distribution propellers on chosen dredgers during some period of time are shown as well. Conclusions are formulated regarding average value of propellers loading and coefficients of variations of loading spred. Results presented in the paper will be used as a base for creation of random models describing real conditions of operation of dredgers’ power plants.

6

Operational Loads Of Diesel Engines On Trailing Suction Hopper Dredgers In Their Main Service States

Bocheński D.

Journal of Polish CIMAC

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2008

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Vol. 3, no 1

9-13

EN

This paper presents results of operational investigations of eight trailing suction hopper dredgers. The investigations covered measurements of parameters which characterize service conditions of two main elements of dredger power systems, i.e. main and auxiliary engines.