scholarly journals A Simulation-Based Planning Tool for Floating Storage and Regasification Units

Logistics ◽  
2020 ◽  
Vol 4 (4) ◽  
pp. 31
Author(s):  
Christos Papaleonidas ◽  
Emmanouil Androulakis ◽  
Dimitrios V. Lyridis
Keyword(s):  
Simulation Model ◽  
Time Horizon ◽  
Realistic Model ◽  
Liquefied Natural Gas ◽  
Planning Tool ◽  
Balance Equations ◽  
System Sensitivity ◽  
Operational Profile ◽  
Simulation Based ◽  
Functional Simulation

The objective of this paper was to propose a functional simulation model for the operation of floating storage and regasification units (FSRUs) used for the import of liquefied natural gas (LNG). The physical operation of an FSRU is decomposed for each critical component of the LNG carrier (LNGC) and the FSRU, in order to construct a realistic model in Simulink. LNG mass balance equations are used to perform flow calculations from the tanks of an LNG carrier to the tanks of the FSRU and from there to shore. The simulation model produces results for cases, when multiple LNG carriers discharge cargoes during a monthly time horizon. This produces an accurate operational profile for the FSRU with information about the volume of LNG inside each of the cargo tanks of the FSRU, LNG cargo discharging and gas send-out rate. Potential practitioners may exploit the proposed planning tool to explore the feasibility of alternative operation scenarios for an FSRU terminal. The simulations can check the system sensitivity to different parameters and support schedule regarding: (i) slots for LNG carrier calls, (ii) LNG inventory fluctuation, and (iii) impact of gas demand and send-out rate changes.

Research on On-Line Anti-Icing Technology for Carenary along Electrified Railway

2013 ◽  
Vol 676 ◽  
pp. 321-324
Author(s):  
Lei Guo ◽  
Qun Zhan Li
Keyword(s):  
Simulation Model ◽  
Heat Balance ◽  
Normal Operation ◽  
Balance Equations ◽  
Model Based ◽  
Static Var Generator ◽  
On Line ◽  
Electrified Railway ◽  
The Heat Balance

Accidents of icing on catenary have great impacts on normal operation of trains. An on-line anti-icing technology used static var generator (SVG) for catenary was proposed, which can prevent icing formation without interrupting trains normal operation. The heat balance equations for catenary were solved, whose results were compared with data provided by TB/T 3111 and testing show the equation was correct. The simulation model based on Matlab was bulit , whose results and analysis show the correctness of the method.

scholarly journals An empirical analysis on the operational profile of liquefied natural gas carriers with steam propulsion plants

2020 ◽  
pp. 1-20
Author(s):  
Carlos González Gutiérrez ◽  
Santiago Suárez de la Fuente ◽  
Jean-Marc Bonello ◽  
Richard Bucknall
Keyword(s):  
Natural Gas ◽  
Greenhouse Gases ◽  
Empirical Analysis ◽  
Continuous Monitoring ◽  
Simulation Models ◽  
Energy Performance ◽  
Liquefied Natural Gas ◽  
Liquid Hydrocarbons ◽  
Operational Profile ◽  
Emission Studies

Abstract Liquefied natural gas (LNG) offers negligible NOx and SOx emissions as well as reductions in CO2 compared with other liquid hydrocarbons. LNG is a significant player in the global energy mix, with a projection of 40% increase in demand for the next two decades. It is anticipated that the expected rise in demand will cause the fleet of LNG carriers (LNGC) to expand. This work concentrates on steam-powered LNGC, which accounted for 47% of the LNGC fleet in 2018. It performs an empirical analysis of continuous monitoring data that provide high levels of accuracy and transparency. The analysis is done on data collected from 40 LNGCs for over a year to estimate the fleet's operational profile, fuel mix and energy performance. The findings of this work are relevant for bottom-up analysis and simulation models that depend on technical assumptions, but also for emission studies such as the upcoming Fourth International Maritime Organization Greenhouse Gases study.

Temperature Control Planning Tool for Multi-Lift Resurfacing of Airport Pavements

2019 ◽  
Vol 2673 (7) ◽  
pp. 380-389 ◽  
Author(s):  
Longjia Chu ◽  
Baihe Zhu ◽  
T. F. Fwa
Keyword(s):  
Simulation Model ◽  
Temperature Control ◽  
Time Variation ◽  
Time Window ◽  
Asphalt Mixture ◽  
Time Lapse ◽  
Planning Tool ◽  
Time Duration ◽  
Deformation And Failure ◽  
Temperature Time

Overnight repairs and resurfacing of runway or taxiway pavements are common in busy airports. The time window available for such repair and resurfacing works is often limited. A common problem encountered is to ensure that the newly compacted asphalt mixture has cooled down sufficiently before receiving aircraft loadings, so as to avoid premature deformation and failure of the asphalt mixture. In this regard, a simulation model that provides a prediction of the temperature–time variation trend of each compacted pavement lift in a multi-lift asphalt course laying would be a valuable planning tool for temperature control. Information on the temperature cooling trend of an asphalt layer helps to estimate the time duration available for effective compaction during laying, as well as the time lapse needed before the pavement is sufficiently stable to receive traffic. A finite element simulation model is presented in this study to predict the temperature–time variation trends of successive asphalt lifts in a multi-lift asphalt mixture laying operation. The numerical model was developed based on the theory of thermodynamics taking into account the heat transfer effects of solar radiation, convection, and conduction. The model was calibrated and validated using data from a field trial involving a two-lift and a three-lift laying of asphalt mixtures. Illustrative examples are presented to demonstrate the applications of the simulation model as a temperature control planning tool for repair and resurfacing operations of airport pavements.

Simulation-based assessment of the installation of a Reversible Substation in a railway line, including a realistic model of large traffic perturbations

2020 ◽  
Vol 115 ◽  
pp. 105476 ◽  
Author(s):  
David Roch-Dupré ◽  
Asunción P. Cucala ◽  
Ramón R. Pecharromán ◽  
Álvaro J. López-López ◽  
Antonio Fernández-Cardador
Keyword(s):  
Realistic Model ◽  
Railway Line ◽  
Simulation Based

Level Mobile Shot Blasting Machine Shot Blasting Wheel in the Dynamic Simulation Based on ADAMS

2011 ◽  
Vol 148-149 ◽  
pp. 837-841
Author(s):  
Dan Zhang ◽  
Yuan Lin Liu ◽  
Hong Tao Li
Keyword(s):  
Simulation Model ◽  
Dynamic Simulation ◽  
Mechanical Model ◽  
Shot Blasting ◽  
Air Resistance ◽  
Simulation Based ◽  
Dynamic Simulation Model ◽  
External Forces ◽  
Machine Analysis ◽  
Speed Of Analysis

The level of mobile shot blasting machine analysis, a mechanical model of the projectile with the blade and shot rounds of dynamic simulation model, the model by imposing constraints and external forces, analysis of air resistance, friction, blade length and projectile diameter of throw playing speed. Played by the speed of analysis can throw further analysis of various parameters on the effect of throwing fight.

USE OF THE SIMULATION OF INVESTIGATION TRANSPORT PROCESSES

2015 ◽  
Vol 2 (2) ◽  
pp. 813-819
Author(s):  
Нургалиев ◽  
E. Nurgaliev ◽  
Кесова ◽  
Yu. Kesova
Keyword(s):  
Simulation Model ◽  
Transport Processes ◽  
Transport Network ◽  
Real System ◽  
Transport Systems ◽  
Qualitative And Quantitative ◽  
Simulation Based ◽  
Quantitative Characteristics ◽  
Graphic Work ◽  
Qualitative And Quantitative Characteristics

Simulation - a method of research, where the studied system is replaced with a model that describes the real system. The simulation-based transport systems is modeling of random phenomena. As a result of the simulation model are obtained qualitative and quantitative characteristics of the graphic work of the blocks describing the various elements of the transport network

Tonsil tie simulator

2013 ◽  
Vol 127 (9) ◽  
pp. 924-926 ◽  
Author(s):  
J Duodu ◽  
T H J Lesser
Keyword(s):  
Blood Vessels ◽  
Low Pressure ◽  
Realistic Model ◽  
Surgical Skills ◽  
Operating Theatre ◽  
Active Bleeding ◽  
Surgical Trainee ◽  
Model And Simulation ◽  
Simulation Based ◽  
Training Opportunities

AbstractBackground:The surgical trainee has to acquire surgical skills in an era of reduced training hours and greater demands for efficient use of operating theatre time. Many surgical specialties are utilising model and simulation-based training to provide safe, low-pressure training opportunities for today's trainee.Method and results:This paper describes a simple, relatively inexpensive tonsillectomy model that enables the practice of tonsil removal and ligation of bleeding vessels. The model is beneficial for the patient, trainee and trainer.Conclusion:The pseudo mouth and active bleeding components of this model provide the trainee with a relatively inexpensive, realistic model with which to gain confidence and competence in the skill of ligating tonsillar blood vessels with a tonsil tie.

Improving Dynamic Fault Tree Method for Complex System Reliability Analysis: Case Study of a Wind Turbine

2015 ◽  
Author(s):  
Jafar Asghari ◽  
Mohammad Pourgol Mohammad ◽  
Farzin Salehpour Oskouyi
Keyword(s):  
Wind Turbine ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Dft Method ◽  
Realistic Model ◽  
Dynamic Fault Tree ◽  
Wind Turbine System ◽  
Simulation Based ◽  
Tree Method

Fault Tree Analysis (FTA) is one of the most developed techniques in reliability studies; however static analysis is not able to encompass the dynamic behavior of complex systems. To overcome this problem, Dynamic Fault Tree (DFT) analysis is suggested in recent researches. The main motivation of this study is a comparative study on differences between Static Fault Tree (SFT) and DFT models of a typical mechanical system (case study of a wind turbine). Also, this paper is aimed to interpretation of the results and sufficiency analysis of SFT to model this system. This study, first presents a SFT analysis for a wind turbine system. Then, DFT is developed for the system. Monte Carlo simulation based method is applied for its analysis. The comparison showed that the DFT method presents more useful and realistic model of a wind turbine system. The proposed method improved the analysis through modification of dynamic gates.

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