| Summary: | 碩士 === 國立交通大學 === 工學院產業安全與防災學程 === 100 === The high standard of water reuse ratio has been setting up for Science Park Administration to avoid the losses on the production of the vendors’ factories inside the Science Park through the promotion and supervision them the effectively usage of water resources and the reduction the water crisis.
In this study case, it is regarding to the project investments for a factory to build two engineering projects which upgrades the water recovery rate to meet the law of standard of water reuse ration. Those two projects are DSR/BG Waste Water Reclaim System and LHF Waste Water Reclaim System. It is necessary to have the Assessment of economic benefits of the Effectiveness of water reclaim for those two projects basic on the quotations from the engineering contractors.
First of all, the data base for the study of the water reuse ratio has been collected basic upon the total water use cost of current factory. Secondary, the Assessment of economic benefits before and after the projects has been evaluated by the Net Present Worth, NPW, a tool of the Engineering Economy. In order to have the ultimate evaluation without any misjudgment, a Sensitivity Analysis has been processed by the variation of investment and reclaim efficiency from these two water reclamation projects.
From the result, the costs of applying DSR/BG Waste Water Reclaim System and LHF Waste Water Reclaim System (including Equipment depreciation) per year are $ 26,020,650 NTD and $ 26,341,955 NTD. It seems to be a positive results of the economic benefits compared to the current cost of $ 26,510,713 per year without applying one of these systems.
After the analysis of the Net Present Worth and the Sensitivity Analysis, the results are different. For the DSR/BG Waste Water Reclaim System, it is positive to the economic benefits when the percentage of the investment is under 139% and the effectiveness of water reclaim is higher than 49.7%. For the LHF Waste Water Reclaim System, it is negative to the economic benefits unless the percentage of the investment is lower than 7% and the effectiveness of water reclaim is higher than 71.7%. The results provide the reference to the future engineering bargaining of the project assessment for the factory.
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