Chapter 9: Multiobjective, Economic, and Lifecycle CCD

Designing for value rather than a single performance number¶

Lifecycle CCD expands system value beyond one response metric to capital cost, operation, reliability, maintenance, environmental impact, and multiple operating conditions.

Learning objectives¶

After completing this chapter, you should be able to:

1. explain and apply energy production;

2. explain and apply loads and fatigue;

3. explain and apply capital cost;

4. explain and apply operations;

5. formulate and verify the chapter methods on a wind turbine balancing AEP, structural mass, fatigue, control effort, capital cost, and LCOE.

Mathematical lens¶

The recurring quantities are plant and controller design, scenarios $s$, and objective vector $F$:

Running example¶

The recurring example is a wind turbine balancing AEP, structural mass, fatigue, control effort, capital cost, and LCOE. Retaining one system prevents apparent improvements from being caused by changed physics, information, loads, or metrics.

Recommended workflow¶

1. define stakeholder metrics.

2. scale objectives.

3. generate Pareto set.

4. validate scenarios.

5. select robust candidate.

Chapter map¶

1. Multiple Conflicting Objectives

2. Weighted-Sum and Epsilon-Constraint Methods

3. Pareto Optimality

4. Performance, Mass, Energy, and Cost

5. Reliability and Maintenance

6. Manufacturability

7. Environmental and Lifecycle Metrics

8. Economic Objectives Such as LCOE

9. Design for Multiple Operating Conditions

10. Selecting a Final Design from a Pareto Set