都市熱島效應與全球暖化使得被動式降溫策略在建築節能中愈加重要。傳統的生態冷卻器（Eco Cooler）雖能利用縮流效應產生降溫，但在施工性、美觀性與大規模應用上仍有顯著限制。本研究基於其原理，提出可量產與構築的「生態冷卻磚」設計概念，並進一步探討結合二氧化鈦塗層之潛在助益。研究方法採用流體力學與熱傳遞理論，透過數值分析建立模型框架，分析不同開口尺度及塗層條件對降溫趨勢的影響。結果顯示，縮流式開口設計有助於形成降溫趨勢，二氧化鈦塗層則可能進一步增強散熱效應。然而，本研究屬於初探性質，僅呈現理論與數值推估之趨勢，尚未包含 CFD 模擬與實測驗證。此研究可作為建築外殼被動冷卻策略之早期參考，並提供後續驗證與應用的設計起點。

The urban heat island effect and global warming have made passive cooling strategies increasingly important in building energy efficiency. Although traditional eco coolers can utilize the contraction effect to generate cooling, they still have significant limitations in terms of construction, aesthetics, and large-scale applications. Based on its principles, this study proposes the design concept of "eco-cooling bricks" that can be mass-produced and constructed, and further explores the potential benefits of combining titanium dioxide coatings. The research method adopts fluid mechanics and heat transfer theory, establishes a model framework through numerical analysis, and analyzes the influence of different opening scales and coating conditions on the cooling trend. The results show that the constricted opening design helps to form a cooling trend, while the titanium dioxide coating may further enhance the heat dissipation effect. However, this study is preliminary in nature and only presents trends in theory and numerical estimation, and has not yet included CFD simulation and actual testing verification. This study can serve as an early reference for passive cooling strategies for building shells and provide a design starting point for subsequent validation and application.