offshore access: “a key driver to increase offshore wind farms efficiency” 22nd april, 2010,...

EWEC 2010 – Warsaw

Offshore Access: “A key driver to increase offshore wind

farms efficiency”

22nd April, 2010, “Offshore access, safety and standards”

INDEX

INTRODUCTION

Iberdrola Ingeniería y Construcción - EWEC 2010 (Warsaw) 2

BACKGROUND

ACCESS & TRANSFER SYSTEMS

RESULTS

DISCUSSION

CONCLUSIONS

INTRODUCTION


OWF Availability (Accessibility + Reliability)

OWF Efficiency (Energy yield, CAPEX, OPEX) vs Incomes

ACCESSIBILITY KEY DRIVER

BACKGROUND


Lack of Offshore Wind Accessibility rules and standards

Guidelines and recommendations “to perform controlled access and transfer of personnel to and from offshore structures”

Identify necessary protection & transfer equipments, guidelines for maintenance works & for fast crew boats and their operators, etc.

Create a PROPER STANDARD FOR OWF

WORKSCOPE: Offshore wind sector itself and additional areas (H&S, O&M, oil & gas)

“OS-J201 Offshore Substations for Wind Farms (Section 7. Access and Transfer)”.- DNV (Oct´09) “OHSAS 18001 Health & Safety Standard”.- Occupational Health & Safety Advisory Services

(OHSAS). “Environmental, Health and Safety Guidelines for Wind Energy”.- International Finance Corporation

(World Bank Group). “Recommendations for Design of Offshore Wind Turbines (RECOFF) (Work Package 6: Operation

and maintenance: labor safety and standard method for data collection)”.- EU Project Recommendations for Design of Offshore Wind Turbines.

“Guidelines for Health & Safety in the industry”.- BWEA Operational Safety Rules Group. “The Health and Safety Risks an Regulatory Strategy Related to Energy Developments”.- UK

Health and Safety Executive (HSE). “DS/EN 50308 Wind turbines - Protective measures - Requirements for design, operation and

maintenance”.- Dansk Standard. “ANSI Z-10 Occupational Health and Safety Management System”.- American National Standards

Institute (ANSI). “CAP 437 Offshore Helicopter Landing Areas – Guidance on Standards”.- Civil Aviation Authority

UK. “OS-E401 Helicopter decks”.- DNV.

CERTIFICATION AND CLASSIFICATION STANDARDS FOR OFFSHORE WIND ACCESIBILITY


MARINE ACCESS

MONOHULL WORKBOATS

CATAMARAN WORKBOATS

SWATH WORKBOATS


ACCESS SYSTEMS

MONOHULL CATAMARAN SWATHLength m 15 20 25

Beam m 5 7 15

Draft m 1 0,9 2,7

Displacement ton 28 25 125

Engine power kW 1.500 750 1.580

Speed (service / max) kt 20 / 24 25 / 28 15 / 18

Fuel consumption l/h 220 150 300

Wave height acceptance m 1,5 2 3,5

Load capacity ton 1 2,5 3

Personnel capacity # 8 12 12

STATE OF ART OF OFFSHORE ACCESS SYSTEMS

AERIAL ACCESS

UTILITY HELICOPTER

OFFSHORE TRANSPORT HELICOPTER


UTILITY HELICOPTER:

Cruise speed:155 knots

Wind speed acceptance: 40-50 knots

Payload capacity: 1 ton

Personnel capacity: 4 persons

Consume (cruise speed):190-220 kilos/hour

OFFSHORE TRANSPORT HELICOPTER:

Cruise speed:140 knots

Wind speed acceptance: 40-50 knots

Payload capacity: 5 ton

Personnel capacity: 19 persons

Consume (cruise speed):500 kilos/hour

STATE OF ART OF OFFSHORE ACCESS SYSTEMS



STATE OF ART OF OFFSHORE ACCESS SYSTEMS - CHARTS


FENDERING SYSTEMS

Personnel capacity:

1 person each Load capacity:

100-150 kg + additional workboat hoist device capacity Wave induced movement compensation?

Boat compensation + boat engine force Wave height acceptance (Hs) :

Boat acceptance (1m - 2,5m) Special needs:

Workboat bow design

Offshore structure design


STATE OF ART OF OFFSHORE TRANSFER SYSTEMS


GANGWAY DOCKING SYSTEMS

OFFSHORE ACCESS SYSTEM (OAS) – Offshore Solutions BV Personnel capacity:

3 persons Load capacity:

300 kg Gangway size (length x width):

17,5 m x 0,8 m Wave induced movement compensation?

Heave compensation Wave height acceptance (Hs):

2,5 m Special needs:

23 ton payload DP2 vessel

Offshore structure design (vertical pole & deck)





OFFSHORE TRANSFER SYSTEM (OTS) – Offshore Solutions BV (Prototype) Personnel capacity:

3 persons Load capacity:

300 kg Gangway size (length x width):

9 m x 0,6-0,8 m Wave induced movement compensation?

No Wave height acceptance (Hs):


Offshore structure design (vertical pole )

4,2 ton payload vessel





WATERBRIDGE TURBINE– IHC Engineering Business (*) Personnel capacity:

1 person Load capacity:

150 kg Gangway length :

8 m Wave induced movement compensation?

No Wave height acceptance (Hs):


Minimal modifications in the offshore structure

(*) Included in WaterBridge solutions family: WB Turbine, WB Seal-slide, WB Barge and WB Platform




PERSONNEL CARRIERS

PTS – Personnel Transfer System (Preproduction)

Personnel capacity:

1 person Load capacity:

500 kg Weight:

4,5 ton Wave induced movement compensation?

Full heave compensation (6 metres distance range) (*)

Wave height (Hs)/ wind speed acceptance:

3 m / 18 m/s Special needs:

Vessel able to sail and hold position in 3m wave height seas

(*) A project specific version is also available (without compensation): load capacity: 2-5 ton; range max: 8 m; wave height: 1,5 m)




PERSONNEL CARRIERS

FROG, TORO (combined with Vessel Based Lift Facility) – Reflex Marine (*) (**)

Personnel capacity:

1-4 persons Wave induced movement compensation?

Yes, with a compensated crane structure (for roll and pitch planes) Wave height (Hs) and wind speed acceptance :

Depends on crane and vessel wave height acceptance Special needs:

DP II vessel preferable

Compensated crane structure

(*) Transfer capsule: production stage, Lifting arrangement: concept stage.

(**)Two more concept variations: Turbine based lift gear and Capsule based lift gear.




FULL COMPENSATED SYSTEMS

AMPELMANN – Ampelmann Operations BV Dimensions (Width x Depth x Height)

8 m x 8 m x 8 m (+ 12 m gangway) Payload capacity:

240 kg (at 20 m range) Wave induced movement compensation?

Yes, 6-DOF (2,4 m, 10º) Wave height acceptance (Hs):

2,5 m-3 m (depending on vessel size) Wind speed acceptance :

35 knots Special needs:

Minimum 25 m beam vessel (80 m preferred)

32 ton payload vessel (Ampelmann weight)




FULL COMPENSATED SYSTEMS

MOMAC OFFSHORE TRANSFER SYSTEM (MOTS) – MOMAC (Testing stage) Dimensions (Length x Wide x Height)

4 m x 1,8 m x 4,5 m Payload capacity:

400 kg Wave induced movement compensation?

Yes, vessel is led to the turbine by a roller fender in X and

Y axle. In Z axle 3,2 m Wave height acceptance (Hs):

Depends on the used vessel (2,5 m with a 35 m vessel) Special needs:

Minimum 5 ton payload vessel (MOTS weight)

Roller fender system to led the vessel to the boat-landing




OTHER ACCESS METHODS

SELSTAIR – Viking Life

WINDLIFT – Fr. Fassmer GmbH

BOAT ACCESS SYSTEM – Caley Ocean Systems

SLILAD - Momac





STATE OF ART OF OFFSHORE TRANSFER SYSTEMS - CHARTS


METOCEAN CONDITIONS (Beaufort scale)

18

ACCESS SYSTEMS MC= 0-4 BS MC = 5 BS MC = 6 BS MC > 6 BS

MONOHULL OOO - - -

CATAMARAN OO OOO - -

SWATH O OO OOO -

HELICOPTER O O OO OOO

Iberdrola Ingeniería y Construcción - EWEC 2010 (Warsaw)

(-) Impossible to deliver the serviceO Can deliver the service with poor effectivenessOO Can deliver the service with medium effectivenessOOO Can deliver the service with good effectiveness

Main used variables:- Wave Hs (marine)- Wind speed (aerial)

RESULTS

COMPARISION AND ASSESSMENT CRITERIA FOR ACCESS CLASIFICATION ACCORDING TO SITE FEATURES

DISTANCE TO COAST (d)

19


ACCESS SYSTEMS d ≈ 10 km d ≈ 20 – 40 km d >> 50 km

MONOHULL OOO OO O

CATAMARAN OO OOO OO

SWATH O OO OOO

HELICOPTER O OO OOO



Main used variables:- Access speed- Wave acceptance- Range

RESULTS

LOAD CAPACITIES (according with cargo/personnel transportation)

20

ACCESS SYSTEMS < 8 persons< 1 ton

8 – 10 persons1 – 2,5 tons

> 10 persons> 2,5 tons

MONOHULL OOO - -

CATAMARAN O OO -

SWATH O O OO

HELICOPTER (UTILITY) O - -

HELICOPTER (TRANSPORT) O O O



Main used variables:- Load capacity- Personnel capacity

RESULTS


21

TRANSFER SYSTEMS MC= 0-4 BS MC = 5 BS MC = 6 BS

FENDERING OOO - -

OAS O OO -

OTS (prototype) OO - -

WATERBRIDGE OO OOO -

PTS (prototype) O OO -

AMPELMANN O OO OOO

MOTS (prototype) O OO OO



Main used variables:- Wave Hs (marine)- Wind speed (aerial)

RESULTS

COMPARISION AND ASSESSMENT CRITERIA FOR TRANSFER CLASIFICATION ACCORDING TO SITE FEATURES

METOCEAN CONDITIONS (Beaufort scale)

22

TRANSFER SYSTEMS1 person

100-150 kg2-3 persons200-300 kg

> 3 persons> 300 kg

FENDERING OOO OO O

OAS O O OO

OTS (prototype) O OO OOO

WATERBRIDGE O OO OOO

PTS (prototype) O - -

AMPELMANN O OO OO

MOTS (prototype) O OO OO



Main used variables:- Load capacity- Personnel capacity

RESULTS

COMPARISION AND ASSESSMENT CRITERIA FOR TRANSFER CLASIFICATION ACCORDING TO SITE FEATURES

LOAD CAPACITIES (according with cargo/personnel transportation)


CONCLUSIONS

Make a good Definition of O&M needs and a good Site characterization

Make a good simulation of project lifecycle through statistical methodologies

Balance correctly Access times & average vs Costs

Design the access system from the project start point No surprises!!!

There´s a need of a PROPER OFFSHORE WIND ACCESS STANDARD

Do not forget any system requirements !!!

Choose the right system for the right place !!!


ACKNOWLEDGEMENTS & GRATTITUDES

Thank You Very Much for your attention!!

[email protected]

Any Questions?

offshore access: “a key driver to increase offshore wind farms efficiency” 22nd april, 2010,...

Documents

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safety guidelines

labor safety

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offshore wind sector

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