[{"data":1,"prerenderedAt":60},["ShallowReactive",2],{"q-109180-arch_environment-32":3},{"question":4,"neighbors":26,"sameNumber":45,"prev":34,"next":37},{"id":5,"classKey":6,"session":7,"year":8,"subject":9,"number":10,"groupStem":11,"ownStem":12,"stem":12,"options":13,"answer":18,"answerKind":20,"answerS":11,"answerNote":11,"images":21,"explanation":22,"withheld":11,"deepChars":23,"freq":24,"indexable":25},"arch-109180-801-0104-032","architect","109180",109,"建築環境控制",32,null,"某室內每平方公尺之平均照度為 500 lx，燈具發光效率為 50 lm\u002FW，照明率為 0.8，維護率為 0.5，則該空間的用電密度為多少 W\u002Fm2？",{"A":14,"B":15,"C":16,"D":17},"100","50","25","15",[19],"C","single",[],"本題考點：以光通量法（流明法）由設計照度、照明率與維護率反求所需光通量，再以燈具發光效率換算單位面積用電量（用電密度，W\u002Fm²）。\n【正解理由】光通量法的關係是：工作面平均照度 E × 面積 A = 燈具總光通量 F × 照明率 U × 維護率 M。改寫成每平方公尺所需的燈具光通量：F\u002FA = E \u002F (U × M)。照度單位 lx 即 lm\u002Fm²，代入 500 lx ÷ (0.8 × 0.5) = 500 ÷ 0.4 = 1250 lm\u002Fm²。燈具每消耗 1 W 可發出 50 lm，所以每平方公尺所需電功率為 1250 lm\u002Fm² ÷ 50 lm\u002FW = 25 W\u002Fm²，故選 C。\n【逐項排除】\n(A) 100：錯誤。是正確值 25 W\u002Fm² 的四倍，大幅高估用電密度；照度除以照明率與維護率的乘積，再除以發光效率，只得 25 W\u002Fm²。\n(B) 50：錯誤。是正確值的兩倍，與光通量法換算結果不符；照明率與維護率是放在分母放大所需光通量，再以發光效率換成功率，結果為 25 W\u002Fm²。\n(C) 25：正確。1250 lm\u002Fm² ÷ 50 lm\u002FW = 25 W\u002Fm²。\n(D) 15：錯誤。小於正確值 25 W\u002Fm²，等於低估了照明損失所需補足的光通量；照明率與維護率都小於 1，所需光通量必然大於照度本身，正確值為 25 W\u002Fm²。\n【演算步驟】\n公式：E × A = F × U × M → F\u002FA = E \u002F (U × M)。\nU × M = 0.8 × 0.5 = 0.4。\n每平方公尺所需光通量：F\u002FA = 500 lm\u002Fm² ÷ 0.4 = 1250 lm\u002Fm²。\n用電密度：1250 lm\u002Fm² ÷ 50 lm\u002FW = 25 W\u002Fm²。\n【記憶點】用電密度 = 照度 ÷（照明率 × 維護率）÷ 發光效率；lx 就是 lm\u002Fm²，單位一路相消到 W\u002Fm²。",626,1,true,[27,30,33,36,39,42],{"number":28,"session":7,"stem":29},29,"有關無障礙垂直通路使用之昇降機，下列設置要求何者錯誤？",{"number":31,"session":7,"stem":32},30,"具有經濟部節能標章認證的室內照明燈具，下列何者不是產品型錄上應標示的項目？",{"number":34,"session":7,"stem":35},31,"有關接地工程（grounding）之敘述，下列何者錯誤？",{"number":37,"session":7,"stem":38},33,"建築物設置受變電設備的電氣室時，其設置規定之敘述何者錯誤？",{"number":40,"session":7,"stem":41},34,"臺灣近 10 年來之平均日照時數統計，那個城市最低？",{"number":43,"session":7,"stem":44},35,"有關日射與外殼節能之敘述，下列何者正確？",[46,49,52,54,57],{"number":10,"session":47,"stem":48},"114180","有關電力系統的敘述，下列何者錯誤？",{"number":10,"session":50,"stem":51},"113190","為達到空調節約能源與室內舒適度，下列那一種節能手法錯誤？",{"number":10,"session":53,"stem":48},"112190",{"number":10,"session":55,"stem":56},"111180","有關電氣系統或設備之敘述，下列何者最正確？",{"number":10,"session":58,"stem":59},"110180","下列有關輸送設備的敘述何者正確？",1791863207504]