Modelling Ship Energy Processes with Multi-Domain Simulation

Transcription

1 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

2 2 Contents Introduction Methodology for the Simulator The Ship Energy Flow Simulator Model Validation First Results Conclusions

3 3 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!

4 4 Ship Energy Efficiency Many SEEMP already exists, e.g., ABB EMMA system A simple but efficient tool is still needed to represent the energy distribution and consumption throughout the entire ship Ship Energy Flow Simulator

5 5 Contents Introduction Methodology for the Simulator The Ship Energy Flow Simulator Model Validation First Results Conclusions

6 6 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,

7 The simulated processes simplified electrical processes 7

8 The simulated processes simplified heat processes 8

9 9 Domains and their component libraries Different physical interactions are modelled in DOMAINS in Simscape Domains involved in the simulator modelling Mechanical domain (τ, ω) To model the DG sets Thermal domain (Q, T) To model the heat exchanging process Electrical AC domain (U aa, I aa ) To model the electrical systems Thermal fluid domain (m, p, q, T) To model the HT and LT systems Steam domain (m, p, q, h) To model the steam powered systems Component libraries for each self-developed domain Engine, generator, pump, thermostat, evaporator, boiler,

10 10 Contents Introduction Methodology for the Simulator The Ship Energy Flow Simulator Model Validation First Results Conclusions

11 11 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

12 12 The Ship Energy Flow Simulator Sub-system DG set Data Source Wärtsila 46 engine project guide

13 13 Contents Introduction Methodology for the Simulator The Ship Energy Flow Simulator Model Validation First Results Conclusions

14 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

15 15 Model validation First results DG generated power real, simulation and their comparison 4.5 x DG power - measured data Ratio = Simulation / real mostly within [0.95 1] Power (W) DG power difference (simulation results / measured data) Time (s) x x 10 7 DG power - simulation results Ratio Power (W) Time (s) x Time (s) x 10 5

16 16 Model validation First results Total fuel consumption real, simulation and their comparison Total fuel consumption - measured Ratio = Simulation / real mostly within [ ] 7000 Fuel consumption (l/h) Fuel consumption comparison (simulation results / measured data) Fuel comsumption (l/h) Time (s) x 10 5 Total fuel consumption - simulation results Time (s) x 10 5 Ratio Time (s) x 10 5

17 17 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 100 Water temperature at HT FCW engine input and output output temperature input temperature Water massflow rate of HT FCW system massflow through engine massflow to heat recovery Temperature (C) 85 Massflow (kg/s) Time (s) x Time x 10 5 Those results fit the practical system very well

18 18 Saving potential / year in one vessel Finer regulation of waste heat recovery temperature One valve fine tuning Fuel savings ~ / year / vessel 84 HT Temperature control of 3-way mixing thermostat Temperature (C) Engine Load (%)

19 19 Contents Introduction Methodology for the Simulator The Ship Energy Flow Simulator Model Validation First Results Conclusions

20 20 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

21 21 VTT creates business from technology