Japan-Norway Hydrogen seminar Collaboration within hydrogen future market and value chain. Petter Ellingsen 28th February 2017.

Size: px
Start display at page:

Download "Japan-Norway Hydrogen seminar Collaboration within hydrogen future market and value chain. Petter Ellingsen 28th February 2017."

Transcription

1 Japan-Norway Hydrogen seminar Collaboration within hydrogen future market and value chain Petter Ellingsen 28th February SAFER, SMARTER, GREENER

2 Content Brief introduction to DNV GL How the properties of hydrogen affect hydrogen safety Applicable standards, regulations and guidelines for fuel cell installation in ships Summary 2

3 Global reach Local competence 3

4 Our vision: Global impact for a safe and sustainable future 4

5 5

6 HySafe NoE ( ) Project Goal: Safe introduction of hydrogen technologies and applications DNV led the Risk Management Cluster and activities on Risk Assessment Risk assessment methodologies Acceptance criteria Risk based determination of safety distances and zone classification HIAD - Development of Hydrogen Incident and Accident Database DNV activities: HyQRA developed reference QRA models Biennial Report Hydrogen Safety Dispersion, combustion and explosion modelling, benchmarking and validation of CFD tools International Conference Hydrogen Safety Regulation, Codes and Standards Mitigation, material compatibility and structural integrity Development of Hydrogen Safety Information System HySafe IS 6

7 Density Nitrogen (N2) Methane (CH4) Hydrogen (H2) Helium (He) Density at 20oC and 100 kpa [kg/m3] 7

8 Diffusion in air Hydrogen (H2) Helium (He) Methane (CH4) Nitrogen (N2) 0 Diffusion coefficient in air [cm2/s] 8

9 Energy content Hydrogen (H2) Methane (CH4) Helium (He) Nitrogen (N2) 0 Lower heating value [MJ/kg] 9

10 Flammability range Lower flammability limit Upper flamability limit Hydrogen Methane Propane Gasoline 10

11 Minimum ignition energy 0.3 Methane (CH4) Propane (C3H8) Gasoline (C8H18) Hydrogen (H2) 0 Minimum ignition energy [mj] 11

12 Safe design principles for maritime enclosed rooms with explosive gas Pipe in pipe Small pipe segments and reliable shutdown valves Optimized gas detection Ventilation at optimal place and rate Inert gas system Explosion suppression agents Vent panels designed for explosion relief to safe location Structural strength to withstand pressures Keep room large Keep room uncongested Reliability and maintenance Avoid possibilities for high pressures Minimize gas leak volumes Gives good air ventilation Reduces explosion pressure build-up 12

13 Strategy for safe design of hydrogen vessel Start early at concept stage when rough sketches of vessel is available Run a Technology Qualification/HAZID/Blast workshop Include yard, designers, authorities so all are on same page Back up with modelling and experiments as needed Run iterative modelling rounds to optimize safety systems and design Deterministic modelling as long as worst case design can be used Probabilistic modelling if worst case gives too high pressure Fundamental modelling and experimental research on effects of safety systems can start before a ship design is selected 13

14 Technology Qualification Process 14

15 15

16 Short summary of regulative status Requirements for on-board energy generation systems Fuel specific requirements Maritime Fuel Cell Systems IGF code entered into force Jan. 1 st 2017 Contains detail requirements for natural gas as fuel only, and internal combustion engines, boilers and gas turbines Work started on technical provisions for methyl-/ethyl- alcohols as fuel and fuel cells Alternative Design Approach Most classification societies have established Rules covering fuel cells and to some extent low flashpoint liquids 16

17 Summary and conclusions The overall safety level shall be equivalent to that achieved with conventional oilfuelled main and auxiliary machinery (IGF, A, 3.2.1) A risk assessment shall be conducted (IGF, A, 4.2) Explosion analysis/analyses shall be conducted (IGF, A, 4.3) All participants in the project should familiarize with MSC.1/Circ.1455, the IGF Code and the Class Rules. DNVGL has recently done a Study on the use of fuel cells in shipping for the European Maritime Safety Agency (EMSA). The report consists of three parts: Fuel Cell technology and -projects Regulations and Gaps Safety and Risk analysis 17

18 GAP analysis over Rules, Regulations and Guidelines 18

19 19

20 Summary Hydrogen can be safe technology is available in all parts of the industry Real properties of hydrogen should be considered and assessed in design There are gaps related to regulatory framework Decision support and conceptual choices, Hydrogen ready? Risk management and safety studies: For safe design and approval Technology Qualification 20

21 Thank you! Petter Ellingsen +82 (0) SAFER, SMARTER, GREENER 21