美國舊金山 拉金街變電站擴建
The newly completed electrical switchgear building is the first Net Zero Energy (NZE) targeted electrical substation building in the United States. Tucked midblock on Eddy Street between Larkin and Hyde, the steel frame concrete structure is a modern addition to the existing historic 1962 substation building designed by PG&E to supply power to the northeastern part of the city.
此案為一座電力開關設備大樓，是美國第一座以淨零為目標的變電站大樓。坐落於舊金山拉金街與海德街之間的街區，量體採鋼架混凝土結構，是太平洋瓦電公司於 1962 年設計的變電站之延伸，旨在為該城市之東北地區供電。
The constrained property and need to accommodate crane and equipment lift access prescribed the expansion’s perpendicular orientation to the existing substation. The utilitarian structure features street-facing façades that integrate three types of GFRP panels – sloped, perforated, and ribbed – to form a faceted surface that belies its otherwise modest materiality. Each panel is individually crafted and unique, with ribs that cast linear shadow patterns in sunlight, creating an ever-changing surface throughout the day and year.
由於場地限制，且需因應起重機和設備升降通道，此擴建工程的方向必須與現有變電站垂直。建築的外牆面向街道，採用三種類型的 GFRP 面板形成切面，包含斜面、穿孔，以及似褶皺的凸起線條，旨在掩蓋既有材質。各面板皆為單獨製作，因此顯得獨一無二；表面的凸起線條在陽光照射之下產生陰影，繼而賦予該量體多變的外觀效果。
Sloped panels embedded with lighting fixtures pulsate across the building at night, expressing the City’s dynamic electrical power grid. The west-facing green wall, planted in a geometric pattern that echoes the faceted concrete walls, provides biophilic relief to the urban block while asserting its contribution to green values. A fine-grained metal mesh provides a transition between the existing and new addition and is also used to bookend the façade.
夜晚時分，嵌有照明燈具的斜面板使建築熠熠生輝，呈現該城市的動態電網特色。一道綠牆面朝西方，上方植被造就幾何圖形，與切面混凝土牆遙相呼應，為城市街區帶來生機，細紋金屬網則成為新舊建築之間的過渡，同時作為立面上的裝飾品。
On top, 60 kW solar panel arrays offset the building’s energy consumption. Large vents at the base of the building exploit the City’s cool temperatures through natural ventilation that helps eliminate the need for artificial cooling and reduce the building’s energy load by nearly 40 percent. Inside, supplemental fans, triggered only at high temperatures, help to cool the building only when needed. A comprehensive deep dive into understanding the electrical needs of each discreet piece of equipment – from mechanical systems to the hand dryer in the restrooms – led to an incremental load reduction.
該量體頂部的 60 千瓦的太陽能板陣列，為建築提供能源；底部的大型通風口引入城市低溫替代冷氣，僅在高溫時才啟用電扇，此手法使該項目在能源負荷方面降低百分之四十；團隊亦透過深入瞭解各設備之用電需求，以逐步減少其用電負荷。
