Economic Appraisal of Paludans Flak Windturbine Appraisal of Renewable Energy Projects with Cases from Samso > Appendix C: Under Development > Economic Appraisal of Paludans Flak Windturbine 1 ECS Chapter 1 2 Simple Investment Stream 3 Pay-off period rate of return 4 Average rate of return 5 NPV 6 Conclusion