全球氣候變化及其相關環境問題引起大眾對社會可持續發展的關注。近幾十年來，全球一致大力減少溫室氣體排放，在建築方面，能夠經由訂定法規來控制建築外殼的設節能設計，為節約能源和減少溫室氣體排放作出重大貢獻。建築能源標准或規範在能源效率政策中變得越來越重要，這些標準有助於提高建築節能的關注和意識，促進建築節能設計。世界上許多國家也都有制定相關的規範及限制，期望透過建築能源標準，以實現節能減碳的目標。台灣的ENVLOAD和東南亞國家的OTTV都是性能式建築外殼指標。從公式轉換或者物理意義的推導，本研究證明了ENVLOAD和OTTV兩者之間是可以互相轉換。本研究以台灣的辦公建築為例，以台北、台中、高雄及花蓮作為研究對象，通過不確定性分析結合建築能源模擬技術，成功的建立台北、台中、高雄及花蓮地區辦公廳類建築的OTTV公式，以及找出對應現行ENVLOAD基準值的OTTV基準值。同時，也完成了綠建築外殼節能得分從以ENVLOAD改成以OTTV計分的轉換。
本文的重點除了建立台灣各地區 OTTV 公式和其對應的基準值以外，並非嘗試以 OTTV 來取代在台灣已應用多年且成效良好的 ENVLOAD，而是在提出發展適合。台灣 OTTV 公式的方法與流程。目前正值台灣綠建築標章走向國際化，特別是朝南鄰的東南國家推廣的時候，本研究提出的方法適合用來發展出其他國家或城市的一致性公式，相信對台灣綠建築標章認證體系的國際化將會有所幫助。

Global climate change and its related environmental issues have aroused public concern about the sustainable development of society. In recent decades, concerted efforts have been made to reduce globally greenhouse gas emissions. In construction, it has been able to make significant contributions to energy conservation and greenhouse gas emissions by setting regulations to control the design of energy-saving designs for building enclosures. The ENVLOAD of Taiwan and OTTV of Southeast Asian countries are both performance-based envelope building indices. According to the deductions of formula transformation and physical significance, this paper proved that interconversion can be achieved between ENVLOAD and OTTV. Taking office buildings in in Kaohsiung, Taipei, Taichung and Hualien for example, this paper applied uncertainty analysis and building energy simulation techniques to successfully establish an OTTV formula for office buildings in Taiwan and determined the OTTV reference value of the corresponding and current ENVLOAD reference values. Meanwhile, the scoring of green building envelope energy saving has been transformed from ENVLOAD to OTTV. Taiwan Green Building label is currently going internationalization. In particular, regarding the promotion of Southeast Asian countries facing south; the method proposed by this paper is suitable to develop a consistent formula for other countries or cities. It is believed that this formula will be helpful for the internationalization of Taiwan Green Building label certification system.

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