initial commit / add all books

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diff --git a/3878/CH15/EX15.2/Ex15_2.sce b/3878/CH15/EX15.2/Ex15_2.sce
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+clear
+// Variable declaration
+T=5//  The dry bulb temperature in 
+R=3.6// The rate of air change per day
+V=35000// The store volume in m**3
+v_spa=0.8// The specific volume in m**3/kg
+q=600// m**3/h
+n=2// The number of two pellet truck doors
+h_1=15.9// kJ/kg
+h_2=-24.3// kJ/kg
+T_1=20// °C
+T_2=-25// °C
+t=24// Time duration for one day in hours
+t_s=24*60*60// Time duration for one day in seconds
+
+// Calculation
+R_woh=V*R/v_spa// The rate of air change without dehumidification in kg/day
+Q_woh=R_woh*(h_1-h_2)/t_s// The cooling load without dehumidification in kW
+R_wh=q*n*t/v_spa// The rate of air change with dehumidification in kg/day
+Q_wh=R_wh*(T_1-T_2)/t_s// The cooling load with dehumidification in kW
+printf("\n \nThe rate of air change without dehumidification is %5.0f kg/day. \nThe cooling load without dehumidification %2.1f kW(calculation error).",R_woh,Q_woh)
+
+printf("\n \nThe rate of air change with dehumidification is %5.0f kg/day. \nThe cooling load with dehumidification %2.2f kW.",R_wh,Q_wh)
+