OTEC power, research and implementation by the Korean Government: Case study of a 1MW power plant for the Republic of Kiribati

Transcription

1 OTEC power, research and implementation by the Korean Government: Case study of a 1MW power plant for the Republic of Kiribati Hyeon-Ju Kim, Ho-Saeng Lee, Dong-Ho Jung, Sung Woo Kim, Sa-Young Hong and Christopher Mark Day Korea Research Institute of Ships and Ocean Engineering (KRISO) Ministry of Oceans and Fisheries(MOF) of Republic of Korea

2 22kW In OTEC history and current status : 100kW OTEC plant Grid-connected (NELHA/MOE)

3 Ongoing project for OTEC demonstration Goseong, South Korea 20kilowatt plant, Korea(MOF) (only operated in the summer) Tarawa, Kiribati (by KRISO team) 1 megawatt plant, Korea(MOF) Martinique, Fr(by Akuo E.) 10 megawatt plant, EU

4 2. 1MW OTEC plant design Electric power can be generated by rotating a turbine using gaseous flow of evaporated working fluid. Warm surface and cold deep seawaters are used for heat source and sink, respectively. Evaporator 1 2 Turbine T Surface sea water Q e 2 Pump 3 Working fluid : R32 refrigerant W T 4 Condenser W P 1 4 Q c 3 Deep seawater S 15kW-OTEC(French 11) 20kW-OTEC(Korea 13) 50kW-OTEC(Japan 13) 100kW-OTEC(USA 15)

5 Analysis of 20kW OTEC for 1MW design Seawater Pump 80.0%/1MW 90.0%/1MW 93.1%/1MW 87.5%/1MW

6 Design of 20kW OTEC plant as 1MW pilot plant Evaporator Condenser Accumulator Turbine-generator Receiver WF pump

7 20kW OTEC pilot plant Fabrication of pilot OTEC plant for 1MW Condenser Separator Turbine-generator Circulation pump Receiver Evaporator

8 Experiment of 20kW OTEC pilot plant Operation of 20kW OTEC

9 700C P PLANT NORTH PLANT SOUTH ESCAPE TRUNK P P Vacuum Detail design of 1MW OTEC plant on offshore platform and land Ref. Recovery MAIN SWITCH BOARD Recovery Tank P B.W PLANT WEST PLANT EAST HULL DUCT B.W B.W EXPANDED METAL ESCAPE TRUNK ELEC. WELDING RM WORKSHOP & STORE Offshore OTEC On-land OTEC SWAC Agri/aquaculture Desalination Byproducts 2020~2025 (M-ODA/?) 2016~2020 (M-ODA/Kr)

10 3. 1MW OTEC structure design 1MW ID 1.2m HDPE / 10MW ID 4m FRP / 100MW ID 10m FRP * Wire ; Reinforcement by tensile strength * Lumped mass ; For Specific density

11 Design condition of 1MW OTEC plant Environmental conditions (Tarawa, Kiribati) Water depth: 1100m Current velocity: 1.4m/s 100yr Storm case Max. Current case Bottom topography (SPC) H s (m) 3.89 (~10.2) 1.49 T p (sec) 14.0 (~12.8) 14.0 Gamma of JONSWAP Spectrum Mean wind speed for 10 min. (m/s) (~33.80) 8.00 Surface m yr storm Wave spectrum Current speed (m/sec) 100m m m m * ( ) : external force environment around Fiji 1000m Example of current profile at Tarawa waters

12 Design of offshore platform for 1 MW OTEC plant

13 Stability enhancement of floater Type A Type B Model test in regular waves Heave Pitch

14 Model test in irregular waves OTEC A Hs=10.2m Tp=12.8s OTEC B

15 Dynamic response test w & w/o riser Type A Type B

16 Fatigue analysis of OTEC riser

17 Structural analysis of OST OTEC platform

18 Analysis and design of mooring systems and subsea power cable

19 Design of 1 MW OTEC plant 2 nd deck 3 rd deck Top deck

20 Approval In Principle from BV

21 1MW OTEC demonstration plant Performance test and transport to install Verification experiment (2018) Assembling (2018~2019) South Tarawa Design approval of 1/10MW OTEC plant on offshore platform will be tried in 2020 For multi-purpose use of discharged seawater for FEW application

22 Sustainable Seawater Utilization Academy 22

23 ODA projects often fail at the point of ownership transference We need detailed program for full technology transference A competent capacity-program designed and installed with local stakeholders

24 Who&What 1MW OTEC Demonstration Plant Capacity-building for operation and maintenance by Kiribati people

25 Kiribati Goseong, South Korea 20kilowatt plant, Korea(MOF) (only operated in the summer) Tarawa, Kiribati (by KRISO team) 1 megawatt plant, Korea(MOF) 25

26 Electricity and GDP Kiribati Netherlands South Korea USA Electricity use per capita (kwh per capita) GDP - per capita (USD) 26

27 Obseity and Water Kiribati Netherlands South Korea USA Obseity - adult prevalence rate (%) Water (Population with improved drinking water sources -urban and rural) 27

28 Arable land and Climate change 100,000,000 1,000,000 10, Kiribati Netherlands South Korea USA Arable land (Hectares) CO2 emissions (Kt) 28

29 Our goal Food and water CO2 emissions (Kt) Obseity prevalence (%) Water availability (%) Kiribati (2013) Future Kiribati Electricity, Agriculture, and GDP Kiribati (2013) Future Kiribati Electricity use per capita (kwh per capita) Arable land (Hectares) GDP - per capita (USD) Self-Reliant for Food, Energy, and Water Kiribati (2013) Future Kiribati

30 How and when? 1MW OTEC Demonstrati on Plant 2016 Design and fabrication of essential parts 2017 Design and fabrication of secondary parts 2018 Installation and test operation in the East Sea of South Korea 2019~2021 Transportation, installation and test operation in Tarawa, Kiribati Preparation for technology transference SSUA Invitation of 2 SSUA participants to South Korea Advanced courses Education center for seawater plant

31 Prof. K. H. Kim Chungnam Uni. Water Quality Prof. N Yeurt USP Bioenergy Prof. Michaelna USC Renewable Energy and Entrepreneurship Prof. Choi Korea Uni. Eco-Toilet Dr. H. J. Kim KRISO Program Manager OTEC/DOWA Prof. Nuttall USP Logistics/Finance Prof. H. G. Kim Gangneung- Wonju Uni. Seaweed Honorary Advisor (FP, Kiribati) A. Tong Dr. D. S. Moon KRISO Desalination Prof. J. K. Kim Cheonnam Uni. Marine survey Dr. H. S. Lee KRISO OTEC KRISO Coordinator S. W. Kim Prof. Ahmed USP OTEC Prof. S. G. Jeon Hangyang Uni. Finance Mark Day SPC Coastal construction Prof. Albert Kim UHM Desalination Director Yoon Seabase Diving Prof. W. H. Kang Kangwon Uni. Agriculture USP Coordinator M. Toginga Jeremy Hills USP ODA program

32 Most importantly, Our SSUA participants..

33

34

35 1MW OTEC demonstration plant Installation for long term operation (2019~2020) Agri/aquaculture SWAC On-land OTEC 2016~2020/MOF Offshore OTEC 2020~2025 Desalination

36 Power supply and cascade utilization based on 1MW OTEC plant operation Agri/aquaculture SWAC On-land OTEC 2016~2020/MOF Offshore OTEC 2020~2025 Desalination

37 Thank you for your attention! 37