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臺灣能源期刊論文全文

臺灣能源期刊第2卷第1期內容

出刊日期:March, 2015

題目
氣候變遷調適成本效益個案分析—以火力發電廠水災為例
Title
Cost- Benefit Analysis of Climate Change Adaptation— A Case Study on Power Plant
作者
蘇衍綾、徐玉杜
Authors
Yen-Ling Su, Yu-Du Hsu
摘要
為了避免能源供給設施乃至產業受極端氣候事件之衝擊與影響,能源產業應儘早進行調適策略規劃。本文旨在量化調適措施之成本效益,以利該產業面對氣候變遷時規劃適當的調適措施,因此文中試以從某一發電廠可能面臨的淹水風險設施擬訂調適措施,進而計算該調適措施的成本效益。分析過程中,假設情境為發電廠所在地區發生高於排水系統設計值(960 mm/日)之暴雨(鄰近雨量站資料顯示其為250年重現期規模),廠內來不及處置,發生淹水大於1米以上,造成該廠無法供電(缺電) 10天。為避免上述損失可增設防水閘門及抽水機,其為調適的成本,而避免發生災害時造成損失的金額為調適的效益。由案例分析可知,此發電廠之最低淨現值為-10,809,020元,益本比為0.03;若以不需調度其他發電單價較高的機組之成本差異視為避免發電損失的金額,其電力公司 於非用電尖峰時段,淨現值為16,323,990元,益本比為2.47;於用電尖峰時段,淨現值為39,792,225元,益本比為4.58;納入各產業及全臺電力用戶損失計算,最高淨現值為102,347,381元,益本比為10.21。研究結果顯示,以發電廠本身考量,其成本高於效益;但若以電力公司角度或納入各產業全臺電力用戶評估,則效益會遠高於成本,亦即以防水閘門及抽水機作為調適措施是具有效益的。此外,初步對評估參數進行不確定性分析顯示其變異量相當高,而主要因素為選擇鄰近雨量站是否具有足夠之代表性。
關鍵字
氣候變遷、發電廠、調適措施、成本效益
Abatract
This study establishes a cost-benefit analysis method of climate change adaptation for a thermal power plant. In this case, we assumed a 1m-flooding happened in the region of the power plant which is due to a rainstorm of 960 mm/day, a 250-year-return-period, was occurred nearby. Then the power plant stopped the supply of electricity for 10 days. A copy adaptation measure was to building additional waterproofing gates or pumps. The case showed the minimum net present value is -10,809,020 NT$ and benefit-cost ratio of 0.03 for the power plant. However, the maximum net present value was 102,347,381 NT$ and benefit-cost ratio of 10.21for the power company. The results showed that the cost was higher than the benefits from power plant view-point. However, for the power company, the benefits was higher than the cost. The reason was that the power company need to start higher cost generators. In additional, avoidance of customers’ losses also increased the benefits. The uncertainty analysis showed the variance was probably high which depended on the selection of a representative rainfall station is adequate or not.
Keywords
climate change, power plant, adaptation measures, cost-benefit