Appendix C: Under Development Appraisal of Renewable Energy Projects with Cases from Samso > Appendix C: Under Development 1 Economic Appraisal of Paludans Flak Windturbine 1.1 ECS Chapter 1 1.2 Simple Investment Stream 1.3 Pay-off period rate of return 1.4 Average rate of return 1.5 NPV 1.6 Conclusion