Case Study 6: Reducing environmental impact due to increased reliability

A team from Ingeteam has been working in collaboration with Enerocean, Sabella, Bureau Veritas and Ifremer for the development of task 1.7 within RealTide work package 1. The objective is the comparative study of the potential reduction of the environmental and economic impact over the lifetime of Sabella's D10 tidal turbine when applying the O&M strategies, monitoring techniques and new materials proposed in the different work packages of the RealTide project.

Sabella provided the list of all operations (installation, maintenance and dismantling) that are carried out during the lifetime of the D10 turbine and their execution times, as well as vessels types and their consumption.

Based on this data and taking into account all the studies and work carried out in the different work packages of the project: RAM assessment (Bureau Veritas), Monitoring plan (Enerocean & Ingeteam) and new proposal materials (Ifremer & Enerocean), it was estimated that although in the installation and dismantling operations the reduction does not have a direct impact on the carbon footprint or costs, in the maintenance phase the impact can be more than significant due to the reduction of maintenance visits from 125 to 50 in the life cycle of a tidal turbine. This estimate totals not only a strong reduction of the total environmental impact during the life cycle, reaching a reduction of almost 60% (19.320.495,8 Kg CO2-eq of Carbon Footprint vs. 47.565. 741.7 Kg CO2-eq of Carbon Footprint), but also a similar percentage of cost reduction in the operation phase (OPEX) (2,860,108.84 € estimated cost introducing RealTide innovations versus 7,037,773.59 € estimated using standard operation and maintenance practices).

Estimation of the reduction of environmental and economic impact over the lifetime of Sabella´s D10 tidal turbine.