the mussels, while the crew is busy carrying out the maintenance work. When tasks
are finished, the ship takes the crew on board again and brings the harvest ashore.
To achieve the pursued cost reductions, the following aspects of synergy are
seen as prerequisites:
• Clusters of aquaculture integrated with, or between, clusters of wind turbines
• Combined Operations and Life Cycle Management
• Use of multi-purpose support vessels, capable to operate under significant
wave-height conditions of up to 3 m
• Well-trained staff, capable to operate and maintain all installations
• No additional staff needed for the control room
The previously mentioned assumptions are expected to lead to an overall
reduction of O&M costs by at least 10%. The following cost breakdown (in % of
the total O&M cost of wind energy) is considered to be an adequate estimation for
offshore mussel farming and the combination of offshore wind and mussel farming.
The Figures derived serve as set targets and baselines or references for a first
analysis in the LCA model (Table 4.2).
Although the cost breakdown for offshore wind farming is fairly well-founded, it
must be taken into account that the estimations for combined wind and mussel
farming are indicative and used as a first estimated baseline for running the AMC
model.
4.3.3 Asset Management Control (AMC) Model
More participants in the O&M process will lead to a more complex organization
and more uncertainty and financial risk for the asset owner. A model that oversees
all participants and processes, involved in the O&M of OWFs, will prove to be
essential to determine the cost-effectiveness of the wind and mussel farm (W&MF)
Table 4.2 Estimation of cost shares for wind farming when carried out singly and in combination
with mussel farming, based on the expert workshop
O&M Disciplines
Wind farming (%)
Combination wind and mussel farming (%)
Operations
11
9
Life cycle management
7
6
Inspective maintenance
10
9
Preventive maintenance
12
11
Corrective maintenance
35
32
Improvement
25
23
Cost reduction
–
10
Total
100
100
Baseline (bl) is the O&M OPEX distribution according to Miedema (2010)
106
C. Röckmann et al.
are finished, the ship takes the crew on board again and brings the harvest ashore.
To achieve the pursued cost reductions, the following aspects of synergy are
seen as prerequisites:
• Clusters of aquaculture integrated with, or between, clusters of wind turbines
• Combined Operations and Life Cycle Management
• Use of multi-purpose support vessels, capable to operate under significant
wave-height conditions of up to 3 m
• Well-trained staff, capable to operate and maintain all installations
• No additional staff needed for the control room
The previously mentioned assumptions are expected to lead to an overall
reduction of O&M costs by at least 10%. The following cost breakdown (in % of
the total O&M cost of wind energy) is considered to be an adequate estimation for
offshore mussel farming and the combination of offshore wind and mussel farming.
The Figures derived serve as set targets and baselines or references for a first
analysis in the LCA model (Table 4.2).
Although the cost breakdown for offshore wind farming is fairly well-founded, it
must be taken into account that the estimations for combined wind and mussel
farming are indicative and used as a first estimated baseline for running the AMC
model.
4.3.3 Asset Management Control (AMC) Model
More participants in the O&M process will lead to a more complex organization
and more uncertainty and financial risk for the asset owner. A model that oversees
all participants and processes, involved in the O&M of OWFs, will prove to be
essential to determine the cost-effectiveness of the wind and mussel farm (W&MF)
Table 4.2 Estimation of cost shares for wind farming when carried out singly and in combination
with mussel farming, based on the expert workshop
O&M Disciplines
Wind farming (%)
Combination wind and mussel farming (%)
Operations
11
9
Life cycle management
7
6
Inspective maintenance
10
9
Preventive maintenance
12
11
Corrective maintenance
35
32
Improvement
25
23
Cost reduction
–
10
Total
100
100
Baseline (bl) is the O&M OPEX distribution according to Miedema (2010)
106
C. Röckmann et al.