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建築環境控制 吳宗泰
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濕度線圖
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原本室內乾球溫度36oC,相對濕度45%,空調後室內乾球溫度20oC,相對濕度80%,用濕度線圖回答下列問題 1
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冷氣機結構
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冷媒過程 2 3 1 4 火啇
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空調箱 (AHU) 新鮮空氣 供應空氣 返回空氣 排出空氣 Outside Air Supply Air Re-circulated Air
Exhaust Air Return Air 排出空氣 返回空氣
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Power Factor (cosq) Apparent power 視在功率 S [VA] Q [VAR], Reactive power
虛功率,無效功率 q P [W] Absolute power 絕對功率 True (Real) power 真實功率 Active power 有效功率 S = P + j Q = S cosq + j S sinq P Power factor (P.F) = cosq = 功率因數,電力率 S
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RMS value, induction load, i (t) lagging v (t)
(Vmax : Imax) (Vrms : Irms) i (t) 90o (0.5p) 370o (1.5p) 360o (2p) 180o (p) v (t)
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Balanced three-phase (3-f) voltage source
Phase a a Phase b Balanced 3-f power source b Van Vbn Phase c c Vcn n
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Y - connected loads ZY ZY ZY ZY ZY ZY Load Load
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D - connected loads ZD ZD ZD ZD ZD ZD Load Load
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Phasor diagram for a balanced three-phase (3-f) voltage source
Vcn 120o 120o Van 120o Vbn
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Balanced three-phase (3-f) AC loads
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Phasor representation of phase and line voltages in a balanced Y-Y system
Vcn Vab Van 60o 120o 1 Vbn 2
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