Modelling Ship Energy Processes with

Multi-Domain Simulation

Seminar for engine technologies

In Espoo on May 3, 2012

Presenter: Kari Tammi, Research Professor

Team: Guangrong Zou, Riku Salokangas,

Matti Jussila, Mia Elg, Aleksi Halinen,

Kalevi Tervo, Panu Kovanen

FIMECC/EFFIMA funded by TEKES

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Contents

Introduction Methodology for the Simulator

The Ship Energy Flow Simulator

Model Validation First Results

Conclusions

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Ship Energy Efficiency

Increasing Fuel need

Increasingly high Fuel cost

Accumulatively strict IMO rules

EEDI energy efficiency design index

EEOI energy efficiency operational indicator

SEEMP Ship energy efficiency management plan

Come into force soon!

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Many SEEMP already exists, e.g., ABB EMMA system

Ship Energy Efficiency

A simple but efficient tool is still needed to represent the energy distribution and consumption throughout the entire ship

Ship Energy Flow Simulator

5

Contents

Introduction

Methodology for the Simulator The Ship Energy Flow Simulator

Model Validation First Results

Conclusions

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Methodology for the simulator

A general simulation tool for ship power plant

To be modelled at a system level, not to represent every detail

All main sub-systems included

DG sets and electrical systems

Engine, generator, propulsion, engine room, hotel, theater,

Engine Fresh Cooling Water systems HT & LT

LT Auxliary Fresh Cooling Water systems

LT propulsion Fresh Cooling Water systems

Steam powered systems EGE, OFB, steam drum, pump,

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The simulated processes simplified electrical processes

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The simulated processes simplified heat processes

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Domains and their component libraries

Different physical interactions are modelled in DOMAINS in Simscape

Domains involved in the simulator modelling

Mechanical domain (,) To model the DG sets Thermal domain (,) To model the heat exchanging process Electrical AC domain ( , ) To model the electrical systems Thermal fluid domain (,, ,) To model the HT and LT systems Steam domain (,, ,) To model the steam powered systems

Component libraries for each self-developed domain

Engine, generator, pump, thermostat, evaporator, boiler,

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Contents

Introduction

Methodology for the Simulator

The Ship Energy Flow Simulator Model Validation First Results

Conclusions

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The Ship Energy Flow Simulator

Sub systems Electrical AC 4 DG sets HT FCW STEAM LT AUX FCW LT POD FCW Sea Water Data processing Result display

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Sub-system DG set

The Ship Energy Flow Simulator

Data Source Wrtsila 46 engine project guide

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Contents

Introduction

Methodology for the Simulator

The Ship Energy Flow Simulator

Model Validation First Results Conclusions

14

Model validation First results

Partial validation only

A large bunch of real-world data is needed for validation

Extremely difficult to get the data needed, as predicted in the initial plan

Some reasonable assumption based on the avaliable data

The available data from a case ship

Full data for Electrical AC system

Main data for HT FCW system

Partial data for STEAM system

LT AUX and POD FCW systems

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Model validation First results DG generated power real, simulation and their comparison

Ratio = Simulation / real mostly within [0.95 1]

0 1 2 3 4 5 6

x 105

0.5

1

1.5

2

2.5

3

3.5

4

4.5x 10

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Time (s)

Pow

er (W

)

DG power - measured data

0 1 2 3 4 5 6

x 105

0

0.5

1

1.5

2

2.5

3

3.5

4

x 107

Time (s)

Pow

er (W

)

DG power - simulation results

0 1 2 3 4 5 6

x 105

0.8

0.9

1

1.1

1.2

1.3

Time (s)

Rat

io

DG power difference (simulation results / measured data)

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Model validation First results Total fuel consumption real, simulation and their comparison

Ratio = Simulation / real mostly within [0.95 1.15]

0 1 2 3 4 5 6

x 105

0.75

0.8

0.85

0.9

0.95

1

1.05

1.1

1.15

1.2

Time (s)

Rat

io

Fuel consumption comparison (simulation results / measured data)

0 1 2 3 4 5 6

x 105

1000

2000

3000

4000

5000

6000

7000

8000

9000

Time (s)

Fue

l com

sum

ptio

n (l/

h)

Total fuel consumption - simulation results

0 1 2 3 4 5 6

x 105

1000

2000

3000

4000

5000

6000

7000

8000

9000

Time (s)

Fue

l con

sum

ptio

n (l/

h)

Total fuel consumption - measured

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Model validation First results HT FCW sub-system simulation results

Water temperature at one engine input and output

Water massflow rate flowing through the sub-system

0 1 2 3 4 5 6

x 105

70

75

80

85

90

95

100

Time (s)

Te

mp

era

ture

(C

)

Water temperature at HT FCW engine input and output

output temperatureinput temperature

0 1 2 3 4 5 6

x 105

0

10

20

30

40

50

60

70

80

90

100

Time

Ma

ssflo

w (

kg/s

)

Water massflow rate of HT FCW system

massflow through enginemassflow to heat recovery

Those results fit the practical system very well

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Saving potential 50 000 / year in one vessel

Finer regulation of waste heat recovery temperature

One valve fine tuning

Fuel savings ~ 50 000 / year / vessel

0 10 20 30 40 50 60 70 80 90 10064

66

68

70

72

74

76

78

80

82

84HT Temperature control of 3-way mixing thermostat

Engine Load (%)

Tem

pera

ture

(C)

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Contents

Introduction

Methodology for the Simulator

The Ship Energy Flow Simulator

Model Validation First Results

Conclusions

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Conclusions A simplified ship energy flow simulator is developed to improve ship energy

efficiency

The partial validation shows the feasibility and reliability of the energy flow

simulation method

Potential usage of the ship energy flow simulator

Help design an energy-efficient ship

Guide to efficiently operate a ship

Test and compare different energy saving technologies and ideas

Implemented into the existing SEEMP systems for online HIL simulation

Commercialization is under investigation, NOT ONLY FOR SHIP!

The project was carried out within FIMECC/EFFIMA programme and funded by TEKES

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VTT creates business from technology

Modelling Ship Energy Processes with Multi-Domain SimulationContentsShip Energy EfficiencyShip Energy EfficiencyContentsMethodology for the simulatorThe simulated processes simplified electrical processesThe simulated processes simplified heat processesDomains and their component librariesContentsThe Ship Energy Flow SimulatorThe Ship Energy Flow SimulatorContentsModel validation First resultsModel validation First resultsModel validation First resultsModel validation First resultsSaving potential 50 000 / year in one vesselContentsConclusionsSlide Number 21