Wyniki wyszukiwania - BazTech

1

Zintegrowana symulacja ruchu drogowego i emisji zanieczyszczeń. I. Jednolita klasyfikacja modeli ruchu i emisji

Maciejewski M., Maciejewski M.

Logistyka

|

2015

|

nr 4

4611--4620, CD2

PL

W oparciu o przegląd popularnych modeli ruchu drogowego i modeli emisji zanieczyszczeń, dokonano klasyfikacji obu rodzajów modeli. Dla obu klasyfikacji zastosowano jednolite kryteria podziału modeli odnoszące się do rozdzielczości przestrzenno-czasowej modeli, wyrażonej konkretnie różnymi stopniami agregacji w opisie modeli. Klasyfikacja modeli przeprowadzona według jednolitych kryteriów pozwala lepiej określić wymagane formy sprzężenia dla współpracy modeli ruchu i emisji, co rozważono w oddzielnej publikacji [18].

EN

Based on a review of popular models for road traffic and pollution emission, classification of both model types was carried out. For both classifications, uniform criteria were applied: the models were grouped according to the space-time model resolution expressed specifically by different degrees of aggregation in the model description. The model classifications created according to the uniform criteria facilitate defining the required forms of coupling for cooperation of traffic and emission models, which is discussed in the subsequent paper [18].

2

Zintegrowana symulacja ruchu drogowego i emisji zanieczyszczeń. II. Formy integracji modeli ruchu i emisji

Maciejewski M., Maciejewski M.

Logistyka

|

2015

|

nr 4

4621--4629, CD2

PL

W nawiązaniu do zamieszczonego w oddzielnej publikacji [1] przeglądu i jednolitej klasyfikacji popularnych modeli ruchu drogowego i modeli emisji zanieczyszczeń, opracowano ogólne zasady wymagane do przeprowadzenia pełnej integracji modeli ruchu i emisji. Wyodrębniono cztery podstawowe klasy powiązań pomiędzy modelami składowymi, a następnie określono wymagane postaci interfejsów. W ramach poszczególnych klas modeli zintegrowanych wymieniono szereg konkretnych rozwiązań stosowanych w praktyce.

EN

The paper is based on the preceding paper [1], which reviews popular models of both road traffic and pollution emission, and proposes uniform classifications for both types of models. This follow-up paper discusses general principles needed for providing full integration of traffic and emission models. Four fundamental combination classes between component models were identified, and the required forms of interfaces were defined. Within particular classes of integrated models, a number of concrete solutions applied in practice were listed.

3

Program for the emission simulation of toxic compounds in the main engine exhaust of vessels operating in a specified water region

Kniaziewicz T., Zacharewicz M.

Journal of Polish CIMAC

|

2014

|

Vol. 9, no 1

59--68

EN

The current worldwide research on air pollution caused by the emission of harmful compounds from ships' engines is based on a simplified input. The existing databases of harmful compound emissions in the exhaust ofvessels operating in various parts of the world cannot be used to estimate emissions in meso- and microscale, e.g. in the Baltic Sea or the Gulf of Gdańsk, because this would lead to excessive generałization of emission factors, mainly due to the lach ofthe reąuired detail concerning vessel motion characteristics. Theflrst issue tackled within the framework ofthe project, one ofwhose effects is to create a research tool in the form of a computer program which simulates toxic compound emissions in the exhaust ofthe main engines ofvessels operating on a speciflc water body, was to create a vessel trafflc database in a selected marinę region (e.g. the Gulf of Gdańsk). The data was obtainedfrom the marinę Automatic Identification System (AIS). In addition to the parameters of vessel trafflc in the analyzed region of the sea, the database created, is a collection ofthe available construction and operat iona! data of those vessels, such as their size, displacement, power rating of the main propulsion engines, etc. Those data, after the appropriate processing, produced the so-called generalized resistance characteristics of the ships which became the basis for the determination of the maximum demand reguired by the screw propeller under given operating conditions. Information of the motive power (inslantaneous) is necessary to determine the emission characteristics of harmful exhaust gases. The extensive research resulted in the development of an original computer program, MEFSAS (Model of Emission From Ships At Sea), which allows to determine the power ratings ofthe screw propulsion engines (and on their basis the emissions characteristics) depending on the aforementioned variables ofthe operating conditions in the static and dynamie, states.

4

Numerical studies of nitrogen oxides emissions in the main propulsion engine exhaust under various cruising conditions

Kniaziewicz T., Piaseczny L.

Journal of Polish CIMAC

|

2014

|

Vol. 9, no 1

47--58

EN

Measurements of nitrogen oxides concentrations in exhaust gases of marine engines under various cruising are difficult or impossible to perform due to their cost and technical difficulties. Such measurements are generally performed on engines under static load conditions, which are determined by appropriate tests, and this is the basis for computing the values of indicators and characteristics of NOx emissions. The values of the following parameters are determined: specific emissions, emissions intensity, cruise emissions, as well as the propeller, regulatory, and adjustment characteristics of – most frequently – specific emissions. These indicators and characteristics are of limited use for the determining of the NOx emissions level in the exhaust gas of engines belonging to a set of different vessels operating in a given sea area which e.g. due to stricter environmental requirements requires reliable information about the current level of pollution. The authors have made a successful attempt at developing mathematical models in order to determine the resistance characteristics of the hull s of various ships and the power of their engines under different cruising conditions, and to estimate indicators and characteristics of NOx emissions on the basis of numerical simulation studies. The computer program developed allows for the examination of various vessel types, and their various sizes, cruising speed distributions, and changing external conditions (e.g. water density and depth, sea state etc.). The present paper will presented the course of the model's construction, the assumptions, and methods for determining the inter -relationships, and the results of numerical studies for a number of ships under various cruising conditions.