After calculation , we got the result that the net present value ( npv ) was a positive number , the intemal rate of retum ( irr ) was higher than the weighted - average cost of capital ( wacc ) , the investment payback period was l l . 7 years , the discoamed payback period was l 7 . 2 years , the payback period of foreign govenunent loan was 7 . l years , and the payback period of meb loan was 8 . 2 years 本調(diào)查報告的主要結(jié)論是:本項目交通條件良好,具備一定的市場條件,自然條件適宜建設(shè)2 5萬噸級碼頭,施工條件良好,項目的凈現(xiàn)值為正值,內(nèi)部收益率高于加權(quán)平均資本成本,靜態(tài)投資回收期11 7年,動態(tài)投資回收期17