The importance of the transport sector for the national economy is given by its impact on growth, employment and sustainable development. The transport sector corresponds to the volume of goods exported or imported. According to EU data, transport and storage costs ma y account for up to 15% of the value of a finished product. Competitive maritime transport can provide many benefits for both the national and local economy. Port activity is complementary to maritime transport and involves the development of services related to transport. In Romania, the involvement of the private sector in water transport activities is confirmed by the over 200 active enterprises in 2017. The present paper highlights the place and role of the water transport sector for the national, regional and local economy by considering the importance of Romania on the map of European trade and the EU transport network.
The formation of CO 2 emissions is largely dependent on the carbon content of the fuel used in diesel engines and on the fuel consumption. The mixture of biodiesel in fossil fuels is in line with most of the research presented in the specialty literature, a method of reducing CO 2 emissions from diesel engines. Due to these controversies on the obtained results, the research of the biodiesel effects blended with fossil fuels is still a matter of study. Therefore, a laboratory study has been conducted on a naturally aspirated 4-stroke diesel engine, using different mixtures (10, 15, 20, 25, 30, 40 and 50%) of diesel with biodiesel produced from oil rape. The results of the study revealed the fact that CO 2 emissions of the blends used are lower than the same emissions produced when powering the engine with diesel fuel. Furthermore, of all blends used in the study, the 15% biodiesel mixture in diesel fuel was marked by a major decrease of CO 2 emissions and of specific fuel consumption.
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