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建築環境控制

建築環境控制. 吳宗泰. 濕度線圖.

danielle-green
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建築環境控制

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  1. 建築環境控制 吳宗泰

  2. 濕度線圖

  3. 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.原本室內空氣的濕球溫度是多少?2.原本室內空氣的絕對濕度是多少?3.原本室內空氣的(熱)焓是多少?4.原本室內的空氣密度是多少?5.空調後的室內濕球溫度是多少?6.空調後的室內絕對濕度是多少?7.空調後的室內(熱)焓是多少?8.空調後的室內空氣密度是多少?9.在開冷氣前的室內相對濕度是45%，在開冷氣後的室內相對濕度是80%，為什麼在開冷氣後覺得比較乾?

  4. 冷氣機結構

  5. 冷媒過程 2 3 1 4 火啇

  6. 空調箱 (AHU) 新鮮空氣 Outside Air Supply Air 供應空氣 Re-circulated Air Return Air Exhaust Air 返回空氣 排出空氣

  7. 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 + jS sinq P Power factor (P.F) = cosq = 功率因數，電力率 S

  8. RMS value, induction load, i (t) lagging v (t) (Vmax : Imax) (Vrms : Irms) i (t) 360o (2p) 370o (1.5p) 90o (0.5p) 180o (p) v (t)

  9. Balanced three-phase (3-f) voltage source Phase a a Phase b b Balanced 3-f power source Van Vbn Phase c c Vcn n

  10. Y - connected loads ZY ZY ZY ZY ZY ZY Load Load

  11. D - connected loads ZD ZD ZD ZD ZD ZD Load Load

  12. Phasor diagram for a balancedthree-phase (3-f) voltage source Vcn 120o 120o Van 120o Vbn

  13. Balanced three-phase (3-f) AC loads

  14. Phasor representation of phase and linevoltages in a balanced Y-Y system Vcn Vab Van 60o 120o 1 Vbn 2

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