Lidé na fakultě
Ing. et Ing. Daniel Drnec

2025, 2025 Smart City Symposium Prague - IEEE proceedings, New York, IEEE Press), p. 1-7), ISBN 979-8-3315-2551-4, ISSN 2831-5618

Rail transport is a perspective transport mode of the future due to its low environmental impact. Various push and pull measures can be used to increase the modal share of rail. Given the restrictive nature of push measures, it is smart to make maximum use of pull measures. One of the pull measures is the user-friendly interior of rail vehicles, which is the aim of this paper. First, a review of existing studies and methods used to obtain user preferences is conducted. Based on the findings, a conceptual approach for obtaining user preferences and designing an optimal rolling stock interior concept was subsequently defined. The main idea of the proposed approach is to consider the passenger's stay in the vehicle as a dynamic process - the passenger does not only sit in a seat, but also moves during the journey (e.g. goes to the toilet, takes things out of carry-on luggage etc.). Another important part is to take into account external influences such as frequency of connections or journey times.

Stať ve sborníku z prestižní konf.

2025, Transport Means 2025. Proceedings of the 29th International Scientific Conference, Kaunas, Kaunas University of Technology), p. 1141-1147), ISSN 2351-7034

Rail transport is a transport mode with low environmental impact and potentially high travel speeds. To ensure that trains are attractive to passengers, it is important to offer sufficient comfort. However, comfort features come with higher costs in many areas such as the purchase price of the features, the space required in the vehicle or the traction energy. This paper looks at the impact of seats and modern features such as air conditioning and vacuum toilets on the running costs of trains. The results show that the use of double-priced seats (EUR 4,000 instead of EUR 2,000) on a long-distance train with approximately 550 seats raises operating costs by only 1.5-2 %, whereas the 1st class layout raises costs by 22-25 % compared to the common 2nd class layout. If the train is not equipped with an air conditioning and a vacuum toilet, a reduction in operating costs of approximately 10 % can be expected - but this would likely also result in a decrease in revenue. Operating costs are also highly dependent on the daily mileage of the train - a reduction from 1200 km to 600 km leads to a 55% increase in cost per km.

Stať ve sborníku z prestižní konf. (Scopus)

2024, 2024 Smart City Symposium Prague - IEEE PROCEEDINGS, New York, IEEE Press), ISBN 979-8-3503-6096-7, ISSN 2831-5618

The electrification of road transport can have significant impacts on the load on the electrical grid. It depends mainly on the number of vehicles being charged simultaneously and the charging power. However, it is unlikely that all cars will be charging at the same time. In this paper, a case study estimating the future load on the electric network by residential charging of electric cars in the Skalka housing estate in Ústí nad Labem is presented. In this study, vehicle stays in the area of the Skalka housing estate during the measured day were recorded, to which were subsequently assigned in several iterations model data on the distance traveled on the measured day and scenarios of usual vehicle use, established on basis of the outputs of the travel behavior survey 'Cesko v pohybu'. The charging times of the vehicles were derived from distance traveled, energy consumption and charging power. The performed iterations were subsequently statistically evaluated. Three strategies of charging were compared: unmanaged daily charging, managed daily charging and unmanaged occasional charging (after approx. 150-200 km). The conclusion is that in the least favorable case, which was unmanaged daily charging, a power corresponding to 1.2-1.3 kW per apartment in the location is needed. In the case of managed daily charging, the power peak shifts to the night hours and its value drops to half. In the case of occasional charging, the number of charging stations corresponding to one fifth of the number of electric cars is sufficient.

Stať ve sborníku z prestižní konf.

2024, 2024 Smart City Symposium Prague - IEEE PROCEEDINGS, New York, IEEE Press), ISBN 979-8-3503-6096-7, ISSN 2831-5618

Carsharing is part of a growing segment of sharing economy. It is often described as a more economically advantageous alternative to owning a car, because in the case of carsharing, some cost items are split between multiple users. On the other hand, it is also necessary to take into account the overhead costs of the carsharing operator and the possible poorer availability of vehicles. This paper presents an analysis of the financial benefits of carsharing in the Czech Republic to estimate the potential of replacing private cars while taking into account other limitations like size of the town and public transport offer. Considering that carsharing tariffs depend not only on the distance driven, but also on the duration of the rental, the financial advantage was assessed for different scenarios of vehicle use. This paper also describes a case study from the Skalka housing estate in Ústí nad Labem, in which, in addition to the potential of replacing private cars with carsharing, the necessary number of shared vehicles was also addressed. This was estimated based on recordings of vehicle stays in the area of the Skalka housing estate. The conclusion is that replacing the user's own car with carsharing is beneficial only for people who use their car only occasionally. If limitations such as the use of public transport and the minimum size of a municipality of 20,000 inhabitants are taken into account, carsharing in the Czech Republic can replace 4-8% of private cars (in larger towns 8-17%). Based on measurements at the Skalka housing estate, one shared car can replace 1.89-3.11 private cars. However, it is necessary to mention that several influences (such as comfort) were not taken into account.

Stať ve sborníku z prestižní konf.