Holistic Tool for electrical & thermal calculation of the whole railway ...

Jorge Amaya / Roberto R0mán

CMM

CMM Team: J. Amaya, R. Román, P. Orellana, P. Uribe

Final Conference

31st March 2015, Brussels

Summary Tool description

Characteristics

Inputs

Outputs

Energy Model

Thermal Model

Speed Model

Traction Model

Vehicle Model

Demo 31 march 2015 2

The OSIRIS concept is to develop Optimal Strategies to Innovate and Reduce energy consumption In urban rail Systems by implementing technologies and operational

solutions and tools, whilst testing/demonstrating/assessing their individual and combined benefits in real case scenarios.

OSIRIS Tool has been developed by the Center of Mathematical Modeling in the context of the collaborative research within the OSIRIS Consortium, with contributions from partners

31 march 2015 3

Tool Description Main Objective

to support the decisions of stakeholders in issues such as energy strategies, operational settings and determination of critical points when looking at energy efficiency improvements for metro and light rail networks.

Four large scale systems interact

Trains

Tunnels

Stations

Electrical Substations

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Characteristics (1/2) Component based approach.

Multi-train simulation.

Sequential execution of the assembled modules.

Pre-processing stage for runtime optimization.

Variable simulation time-step.

User selectable execution stages.

Display menu for graphics outputs.

Multiple data output options and I/O interfaces with other tools.

Input data validation routines.

KPI’s calculation.

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Characteristics (2/2) Coded in MATLAB™ and Simulink™

Requirements:

Microsoft Windows XP O.S (or higher)

MATLAB ™ 13a or 13b installation for 32 and 64bits (the vehicle model runs in 32-bit version only)

Simulink ™

Microsoft Excel

AMD64x2 Processor 4000 + or equivalent Intel Pentium IV 3GHz or higher (multi-core, 32 or 64 bits).

At least 2GB RAM, 4 GB recommended.

At least 20MB free disk space for installation of the system.

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Inputs Three files to classify input data

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Topological Track description, #stations, #lines, speed limits.

Systemic Davis parameters, power & braking limits, energy consumption.

Operational Operation settings: dwell time, affluence, trains frequency, travel time.

Outputs (1/2) Speed model

Optimal speed curves vs. Time

Forces & Traction model

Total Traction power vs. time

Traction Power vs. time

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Energy model

Bar chart for Energy Consumption

Pie chart for Energy Breakdown

Bar chart of Total Energy Consumption

Pie chart of Total Energy Breakdown

Outputs (2/2) Thermal model

OSIRIS tool also enables the option of saving results in Excel files for a subsequent accurate analysis.

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Air Temperature Profile Over Time, per Section

Total heat absorbed by the ground, per Tunnel/Station

Heat transferred trough ventilation, per Tunnel/Station

Heat Gains due to Traction, per Tunnel/Station

Heat Gains due to Passenger Losses, per Tunnel/Station

Heat Gains due to Auxiliaries on Tunnel/Stations

Energy Model Computes the total energy

consumption of the whole system, considering electrical consumption data and efficiency for each system.

Subsystems are modeled as compound of simple modules, representing each consumption. The sum these units, with their respective efficiencies represents the energy demand for the electrical substations.

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Thermal Model The model determines the

thermal evolution of the environment, the temperature and humidity along the day for stations, interior of trains and tunnels, and the heat recovered through the HRS module.

Thermal interactions

Heat flow

Mass transfer

Environmental conditions

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Enclousure

Vehicle

AirTrain

HVAC

Train

Traction

Air Convection

Station

HVAC

Train Aux

Station Subsystem

Air

Heat & Mass transfer

Train Subsystem

Friction Losses

Braking losses

Drive losses

Direct Heating

Air

Heat & Mass

Transfer

Heat absorbed

by the ground

Air


Undergound Station

Enviromental

conditions

Air convection

Passenger Heat Flow

Aux. Power

&

Passengers

Losses

Passenger Heat Flow

Direct Heating

Enclousure

Vehicle

Air

air convection

Train

HVAC

Train

Traction

Air Convection

Tunnel

Ventilation

Tunnel

Aux.

Power

Train Aux

Tracks Subsystem

Air


Train Subsystem

Friction Losses

Braking losses

Drive losses

Direct Heating

Air

Heat & Mass

Transfer

Direct Heating

Heat absorbed

by the ground

Air


Tunnel

Enviromental

conditions

Speed Model Optimal speed curve is

calculated through a mathematical model that minimizes total energy consumption.

Four driving regimes: Acceleration

Cruising

Coasting

Braking

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Demo (1/14) Use Case definition

Main data

Topologic

Systemic

Operational

Operation settings

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Results Speed Model (CMM)

Traction Model (CAF,CMM)

Vehicle Model (VUT, SIE)

Energy Model (CMM)

Thermal Model (CMM)

KPI

Comparisons with MARCADET


RATP Data

Main data: Topologic

1 Line, 9 Stations

No curvature

Slope along the line

Fixed Speed Limit 80km/h

All underground

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Main data: Systemic

Max train power 2,45 MW

Traction efficiency 82%

No ESS (on board or stationary)

Train mass 188 ton

Stations auxiliaries Consumptions 160 kW

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Main data: Operational

Two hours of simulation

28 – 31 trains/hours

30 – 45 m3/s ventilation flow

2 – 1097 passengers in trains

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Operation settings

Traction model: CMM

Vehicle model simulated (Matlab 32-bit version)

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Demo (6/14) Results

Speed Model

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Demo (7/14) Results

Traction Model

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Demo (8/14) Results

Vehicle Model

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Demo (9/14) Results

Energy Model

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TRAINS CONSUMPTION [MWh] %

Auxiliaries Consumption 1,56 7,39 HVAC Consumption 0,17 0,82 Energy Consumption Traction 17,77 84,27 Energy Consumption OBESS 0 0 Energy Recovery Traction 12,73 0 Energy Recovery OBESS 0 0 Terminal Losses 1,59 7,53

TRACKS CONSUMPTION [MWh] %

Auxiliaries 0,07 2,42 Ventilation 1,64 60,38 DC Distrib Losses 0,26 9,51 DC SESS Losses 0 0 No Saving Capacity Losses 0,75 27,69

STATIONS CONSUMPTION [MWh] %

Auxiliaries 2,88 98,06 HVAC 0,06 1,94

Demo (10/14) Results

Thermal Model

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Thermal Model

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Second Level

S1 S2 S3 S4 S5 S6 S7 S8 S9 7:00:00 14,5 13,3 13,2 13,2 14,8 13,5 13,4 14,5 13,7

8:00:00 15,8 13,7 13,6 13,5 16,6 14,1 14,1 16,6 14,8

Platform Level S1 S2 S3 S4 S5 S6 S7 S8 S9

7:00:00 16,9 14,3 14,7 14,7 18,4 15,3 15,0 18,9 15,6 8:00:00 19,5 15,5 16,6 16,4 22,3 17,4 17,2 24,0 17,9


KPI

31 march 2015 24

KPI NAME VALUE UNIT DEFINITION

1 Total energy consumption per

pax and km 2,33E-05 kWh/(pax*km)

Total energy consumed in the system measured at the common coupling point, divided by the total number of passenger and the distance travelled by

all trains

2 Share of renewable energy 0 % Percentage of total energy used coming from renewable sources within the

system

3 Efficiency of the railway

distribution grid including substations

100 % Net energy consumption of trains measured at pantograph/3rd rail expressed

as a percentage of the gross energy consumed by trains at substation level

4 Thermal energy recuperation

rate 0 %

Percentage of the total energy consumed in the system that is reused as thermal energy

5 Global Energy recuperation

rate 32,901 %

Recuperated energy of trains as a percentage of the net energy consumption of trains


KPI

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KPI NAME VALUE UNIT DEFINITION

6 In-service traction energy

consumption 1,56E-05

kWh/(pax*km)

Average traction energy used by all trains in the system per total passengers and distance travelled

7 In-service comfort energy

consumption 1,51E-06

kWh/(pax*km)

Average auxiliary energy used by all trains in the system per total passengers and distance travelled

8 Efficiency of energy recovery 0 % Level of braking energy recovered related to the maximum potential capability

of the system

9 Energy consumption in parked

mode 0

kWh/pax-seats

Average energy used by all trains in the system in parked mode

10 Energy consumption in

stations 0,547 kWh/m^2 Average energy usage per station square metre for all stations in the system

11 Total energy consumption per

car and km 0,073

kWh/(car*km)

Total energy consumed in the system measured at the common coupling point divided by the total number of cars and the distance travelled by all trains


Comparison with MARCADET

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TRAINS CONSUMPTION MARCADET

[MWh]

OSIRIS

[MWh]

Auxiliaries Consumption 1.16 1,56

Energy Consumption Traction 19 17,77

Energy Consumption OBESS 0 0

Energy Recovery Traction 5.59 12,73

Energy Recovery OBESS 0 0

Thanks for your attention !

Holistic Tool for electrical & thermal calculation of the whole railway ...

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