initial commit / add all books

21 files changed, 572 insertions, 0 deletions

diff --git a/1808/CH7/EX7.1/Chapter7_Exampl1.sce b/1808/CH7/EX7.1/Chapter7_Exampl1.sce
new file mode 100644
index 000000000..96ef2a867
--- /dev/null
+++ b/1808/CH7/EX7.1/Chapter7_Exampl1.sce
@@ -0,0 +1,15 @@
+clc

+clear

+//INPUT DATA

+w=0.016;//specific humidity in kg/kg

+p=760;//pressure in mm of Hg

+ps=31.78;//saturation pressure in mm of Hg

+ 

+//CALCULATIONS

+pv=(p)*0.02572/1.02572;//Partial pressure of vapour in mm of Hg

+x=(pv/ps)*100;//Relative humidity in percentage

+

+//OUTPUT

+printf('(a)The partial pressure of vapour is %3.4f mm of Hg \n (b)Relative humidity is %3.2f percentage \n (c)According to steam tables Dew point temperature is 21.34 degree c',pv,x)

+

+ 

diff --git a/1808/CH7/EX7.10/Chapter7_Exampl10.sce b/1808/CH7/EX7.10/Chapter7_Exampl10.sce
new file mode 100644
index 000000000..98730cfb1
--- /dev/null
+++ b/1808/CH7/EX7.10/Chapter7_Exampl10.sce
@@ -0,0 +1,31 @@
+clc

+clear

+//INPUT DATA

+ta1=15;//dry bulb temperature in Degree c

+ta2=25;//dry bulb temperature in Degree c

+tw1=13;//wet bulb temperature in Degree c

+tw2=18;//wet bulb temperature in Degree c

+V1=30;//volume of air in m^3/min

+V2=12;//volume of air in m^3/min

+pva=11.22;//Saturation pressure in mm Hg

+pvb=15.461;//Saturation pressure in mm Hg

+p=760;//pressure in mm of Hg

+cp=1.005;//specific pressure

+

+//CALCULATIONS

+pv1=(pva-((p-pva)*(ta1-tw1)*1.8/(2800-1.3*(1.8*ta1+32))));//Saturation pressure in mm Hg

+w1=0.622*(pv1/(p-pv1));//Specific humidity in kg w.v./kg d.a

+pv2=pvb-((p-pvb)*(ta2-tw2)*1.8/(2800-(1.3*(1.8*ta2+32))));//Saturation pressure in mm Hg

+w2=0.622*(pv2/(p-pv2));//Specific humidity in kg w.v./kg d.a

+h1=cp*ta1+w1*(2500+1.88*ta1);//Enthalpy of air per kg of dry air in kJ/kg d.a

+h2=cp*ta2+w2*(2500+1.88*ta2);//Enthalpy of air per kg of dry air in kJ/kg d.a

+ma1=V1/0.827;//Dry mass flow rate in kg d.a./min

+ma2=V2/0.8574;//Dry mass flow rate in kg d.a./min

+ma3=ma1+ma2;//Dry mass flow rate in kg d.a./min

+w3=((ma1*w1)+(ma2*w2))/ma3;//Specific humidity in kg w.v./kg d.a

+h3=((ma1*h1)+(ma2*h2))/(ma3);//Enthalpy of air per kg of dry air in kJ/kg d.a

+ta3=((ma1*ta1)+(ma2*ta2))/(ma3);//dry bulb temperature in Degree c

+tw3=((ma1*tw1)+(ma2*tw2))/(ma3);//wet bulb temperature in Degree c

+

+//OUTPUT

+printf('(i)The specific humidity of the mixture is %3.4f kg w.v./kg d.a \n (ii)Specific enthalpy of the mixture is %3.2f kJ/kg d.a. \n (iii)DBT corresponds to mixture is %3.3f Degree C \n (iv)WBT corresponds to mixture is %3.3f Degree C ',w3,h3,ta3,tw3)

diff --git a/1808/CH7/EX7.11/Chapter7_Exampl11.sce b/1808/CH7/EX7.11/Chapter7_Exampl11.sce
new file mode 100644
index 000000000..96e36988f
--- /dev/null
+++ b/1808/CH7/EX7.11/Chapter7_Exampl11.sce
@@ -0,0 +1,29 @@
+clc

+clear

+//INPUT DATA

+t1=2;//temperature in Degree C

+t2=30;//temperature in Degree C

+x1=0.8;//realtive humidity in percentage

+td2=10;//Dew point temperature in Degree C

+ps1=5.2854;//Saturation pressure in mm Hg

+pv2=9.196;//Saturation pressure in mm Hg

+ps2=31.8052840;//Saturation pressure in mm Hg

+p=760;//pressure in mm of Hg

+cp=1.005;//specific pressure

+

+//CALCULATIONS

+pv1=x1*ps1;//saturation pressure in mm Hg

+w1=0.622*(pv1/(p-pv1));//Specific humidity in kg w.v./kg d.a

+w2=0.622*(pv2/(p-pv2));//Specific humidity in kg w.v./kg d.a

+ma1=(1/(1+w1));//Mass of dry air per unit mass of moist air in kg/d.a.

+ma2=(3/(1+w2));//Mass of dry air per unit mass of moist air in kg/d.a.

+ma3=ma1+ma2;//Mass of dry air per unit mass of moist air in kg/d.a.

+t3=((ma1*t1)+(ma2*t2))/(ma3);//Temperature of the air after mixture in Degree C

+w3=((ma1*w1)+(ma2*w2))/(ma3);//Specific humidity of air mixture in kg w.v./kg d.a.

+h1=cp*t1+w1*(2500+1.88*t1);//Enthalpy of air per kg of dry air in kJ/kg d.a

+h2=cp*t2+w2*(2500+1.88*t2);//Enthalpy of air per kg of dry air in kJ/kg d.a.

+h3=((ma1*h1)+(ma2*h2))/(ma3);//Enthalpy of air per kg of dry air in kJ/kg d.a.

+

+//OUTPUT

+printf('Temperature of the air after mixture is %3.4f Degree c \n (ii)Specific humidity of the air after mixing is  %3.7f kg w.v./kg d.a. \n (iii)Specific enthalpy of the air after mixing is %3.2f kJ/kg d.a.',t3,w3,h3)

+

diff --git a/1808/CH7/EX7.12/Chapter7_Exampl12.sce b/1808/CH7/EX7.12/Chapter7_Exampl12.sce
new file mode 100644
index 000000000..55f5ab9bf
--- /dev/null
+++ b/1808/CH7/EX7.12/Chapter7_Exampl12.sce
@@ -0,0 +1,22 @@
+clc

+clear

+//INPUT DATA

+tw1=20;//wet bulb temperature in Degree c

+t1=30;//dry bulb temperature in Degree c

+t2=15;//dry bulb temperature in Degree c

+pva=17.0521;//Saturation pressure in mm Hg

+p=760;//pressure in mm of Hg

+ps1=31.81;//pressure in mm of Hg

+ps2=12.77;//pressure in mm of Hg

+

+//CALCULATIONS

+pv1=(pva-((p-pva)*(t1-tw1)*1.8)/(2800-(1.3*(1.8*t1+32))));//Saturation pressure in mm Hg

+x1=(pv1/ps1)*100;//realtive humidity in percentage

+w1=0.622*(pv1/(p-pv1));//Specific humidity in kg w.v./kg d.a

+pv2=12.55;//Saturation pressure in mm Hg

+x2=(pv2/ps2)*100;//realtive humidity in percentage

+

+//OUTPUT

+printf('(a)Initial RH is %3.2f percentage \n (ii)Final RH is %3.2f percentage \n (c) from the chart Final wet bulb temperature according to chart is 14.5 Degree C ',x1,x2)

+

+

diff --git a/1808/CH7/EX7.13/Chapter7_Exampl13.sce b/1808/CH7/EX7.13/Chapter7_Exampl13.sce
new file mode 100644
index 000000000..79fc590b1
--- /dev/null
+++ b/1808/CH7/EX7.13/Chapter7_Exampl13.sce
@@ -0,0 +1,27 @@
+clc

+clear

+//INPUT DATA

+t2=50;//dry bulb temperature in Degree c

+t1=30;//dry bulb temperature in Degree c

+t11=25;//wet bulb temperature in Degree c

+V=300;//volume in m^3

+Ra1=287.3;//rate of flow

+p=760;//pressure in mm of Hg

+pva=23.74;//Saturation pressure in mm Hg

+cp=1.005;//specific pressure

+ps2=92.54;//Saturation pressure in mm Hg

+

+

+//CALCULATIONS

+va1=(Ra1*(273+t1))/((p-21.275)*133.5);//Amount of dry air in m^3/kg d.a.

+pv1=(pva-((p-pva)*(t1-t11)*1.8)/(2800-(1.3*(1.8*t1+32))));//Saturation pressure in mm Hg

+w1=0.622*(pv1/(p-pv1));//Specific humidity in kg w.v./kg d.a

+ma=V/va1;//mass flow rate in kg d.a.

+h1=cp*t1+w1*(2500+1.88*t1);//Enthalpy of air per kg of dry air in kJ/kg d.a.

+h2=cp*t2+w1*(2500+1.88*t2);//Enthalpy of air per kg of dry air in kJ/kg d.a.

+pv2=(w1*p/0.6379);//saturation pressure in mm Hg

+Qa=ma*(h2-h1);//Quantity of heat added in kJ

+x2=(pv2/ps2)*100;//Final RH in percentage

+

+//OUTPUT

+printf('(i)Quantity of heat added is %3.2f kJ \n (ii)Final RH is %3.2f percentage \n (iii)from chart Final WBT from the chart is 29 Degree C',Qa,x2)

diff --git a/1808/CH7/EX7.14/Chapter7_Exampl14.sce b/1808/CH7/EX7.14/Chapter7_Exampl14.sce
new file mode 100644
index 000000000..5cbd58a7b
--- /dev/null
+++ b/1808/CH7/EX7.14/Chapter7_Exampl14.sce
@@ -0,0 +1,26 @@
+clc

+clear

+//INPUT DATA

+t1=15;//dry bulb temperature in Degree C

+t3=41;//heating coil temperature in Degree C

+t11=11;//wet bulb temperature in Degree C

+p=760;//pressure in mm of Hg

+x=0.4;//realtive humidity in percentage

+pva=9.83;//Saturation pressure in mm Hg

+ps2=33.68;//Saturation pressure in mm Hg

+cp=1.005;//specific pressure

+

+//CALCULATIONS

+t2=t3-(x*(t3-t1));//dry bulb temperature in Degree c

+pv1=(pva-((p-pva)*(t1-t11)*1.8)/(2800-(1.3*(1.8*t1+32))));//Saturation pressure in mm Hg

+w1=0.622*(pv1/(p-pv1));//Specific humidity in kg w.v./kg d.a

+x2=(pv1/ps2)*100;//realtive humidity in percentage

+h1=cp*t1+w1*(2500+1.88*t1);//Enthalpy of air per kg of dry air in kJ/kg d.a.

+h2=cp*t2+w1*(2500+1.88*t2);//Enthalpy of air per kg of dry air in kJ/kg d.a.

+Qa=h2-h1;//Sensible heat addition in kJ/kg d.a.

+

+//OUTPUT

+printf('(a)DBT is %3.1f Degree C \n (b)WBT is from the chart equal to 16.8 Degree C \n (c)RH is %3.2f percentage \n (d)Sensible heat addition is %3.2f kJ/kg d.a ',t2,x2,Qa)

+

+

+

diff --git a/1808/CH7/EX7.15/Chapter7_Exampl15.sce b/1808/CH7/EX7.15/Chapter7_Exampl15.sce
new file mode 100644
index 000000000..d1f21df57
--- /dev/null
+++ b/1808/CH7/EX7.15/Chapter7_Exampl15.sce
@@ -0,0 +1,32 @@
+clc

+clear

+//INPUT DATA

+V1=200;//volume in m^3/min

+t1=30;//dry bulb temperature in Degree c

+x1=0.8;//realtive humidity in percentage

+t3=14;//Surface temperature in Degree C

+x=0.1;//Coil bypass factor

+ps1=31.81;//Saturation temperature in mm Hg

+pv3=11.97;//Saturation temperature in mm Hg

+cp=1.005;//specific pressure

+R1=287.3;//gas constant

+p=760;//pressure in mm of Hg

+

+//CALCULATIONS

+t2=x*(t1-t3)+t3;//Temperature of air leaving coil in Degree C

+pv1=x1*ps1;//Saturation temperature in mm Hg

+w1=0.622*(pv1/(p-pv1));//Specific humidity in kg w.v./kg d.a

+w3=0.622*(pv3/(p-pv3));//Specific humidity in kg w.v./kg d.a

+h1=cp*t1+w1*(2500+1.88*t1);//Enthalpy of air per kg of dry air in kJ/kg d.a.

+h3=cp*t3+w3*(2500+1.88*t3);//Enthalpy of air per kg of dry air in kJ/kg d.a.

+h2=(x*(h1-h3))+h3;//Enthalpy of air per kg of dry air in kJ/kg d.a.

+w2=(x*(w1-w3))+w3;//Specific humidity in kg w.v./kg d.a

+v1=R1*(t1+273)/((p-pv1)*133.5);//volume in m^3/kg d.a

+ma=V1/v1;//mass of dry air through the coil in kg d.a./min

+Rc=ma*(h1-h2)/210;//Capacity of the coil in TR

+mw=ma*(w1-w2);//Amount of water vapour removed per minute in kg w.v./kg d.a.

+h4=cp*t1+w2*(2500+1.88*t1);//Enthalpy of air per kg of dry air in kJ/kg d.a.

+SHF=(h4-h2)/(h1-h2);//Sensible heat factor

+

+//OUTPUT

+printf('(i)The temperature of air leaving the cooling coil is %3.1f Degree C \n (b)Capacity of the cooling coil is %3.2f TR \n (c)Amount of water removed per minute is %3.3f kg w.v./kg d.a. \n (d)Sensible heat factor is %3.4f',t2,Rc,mw,SHF)

diff --git a/1808/CH7/EX7.16/Chapter7_Exampl16.sce b/1808/CH7/EX7.16/Chapter7_Exampl16.sce
new file mode 100644
index 000000000..885ea3638
--- /dev/null
+++ b/1808/CH7/EX7.16/Chapter7_Exampl16.sce
@@ -0,0 +1,37 @@
+clc

+clear

+//INPUT DATA

+t1=30;//dry bulb temperature in Degree c

+t2=25;//Coil cooling temperature in Degree C

+x1=0.6;//realtive humidity in percentage

+t3=10;//Coil cooling temperature in Degree C

+x=0.2;//bypass factor

+Ra=287.3;//gas constant

+p=760;//pressure in mm of Hg

+V1=80;//volume in m^3/kg d.a

+ps1=31.81;//Saturation pressure in mm Hg

+cp=1.005;//specific pressure

+ps2=23.74;//Saturation pressure in mm Hg

+pv3=9.196;//Saturation pressure in mm Hg

+

+

+//CALCULATIONS

+v1=Ra*(273+t1)/((p-19.08)*133.5);//volume in m^3/kg d.a.

+ma=V1/v1;//Mass of dry air entering the coil in kg d.a./min

+pv1=x1*ps1;//Saturation pressure in mm Hg

+w1=0.622*(pv1/(p-pv1));//Specific humidity in kg w.v./kg d.a

+h1=cp*t1+w1*(2500+1.88*t1);//Enthalpy of air per kg of dry air in kJ/kg d.a.

+h2=cp*t2+w1*(2500+1.88*t2);//Enthalpy of air per kg of dry air in kJ/kg d.a.

+Rc1=ma*(h1-h2);//Capacity of the coil in TR

+x2=(pv1/ps2)*100;//realtive humidity in percentage

+t2r=x*(t1-t3)+t3;//Temperature at refrigeration in Degree c

+w3=0.622*(pv3/(p-pv3));//Specific humidity in kg w.v./kg d.a

+h3=cp*t3+w3*(2500+1.88*t3);//Enthalpy of air per kg of dry air in kJ/kg d.a.

+h2r=x*(h1-h3)+h3;//Enthalpy of air per kg of dry air in kJ/kg d.a.

+Rc2=ma*(h1-h2r);//Capacity of the coil in TR

+w2=x*(w1-w3)+w3;//Specific humidity in kg w.v./kg d.a

+mw=ma*(w1-w2);//Condensate flow in kg w.v./min

+

+//OUTPUT

+printf('CASE I \n (a1)Refrigeration required is %3.2f kJ/min \n (b1)Final RH is %3.3f percentage \n CASE II \n (a2)Refrigeration required is %3.2f kJ/min \n (b2)condensate flow is %3.4f kg w.v./min ',Rc1,x2,Rc2,mw)

+

diff --git a/1808/CH7/EX7.17/Chapter7_Exampl17.sce b/1808/CH7/EX7.17/Chapter7_Exampl17.sce
new file mode 100644
index 000000000..ebf2296a4
--- /dev/null
+++ b/1808/CH7/EX7.17/Chapter7_Exampl17.sce
@@ -0,0 +1,29 @@
+clc

+clear

+//INPUT DATA

+t1=40;//dry bulb temperature in Degree c

+t2=30;//dry bulb temperature in Degree c

+x1=0.2;//realtive humidity in percentage

+tw2=20;//wet bulb temperature in Degree c

+ps1=55.31;//Saturation temperature in mm Hg

+ps2=31.81;//Saturation temperature in mm Hg

+pv2a=17.521;//Saturation temperature at WBT in mm Hg

+p=760;//pressure in mm of Hg

+Ra=287.3;//gas constant

+V1=150;//volumme in m^3

+

+

+//CALCULATIONS

+pv1=x1*ps1;//Saturation temperature in mm Hg

+w1=0.622*(pv1/(p-pv1));//Specific humidity in kg w.v./kg d.a

+pv2=(pv2a-((p-pv2a)*(t2-tw2)*1.8)/(2800-(1.3*(1.8*t2+32))));//Saturation pressure in mm Hg

+x2=(pv2/ps2)*100;//realtive humidity in percentage

+w2=0.622*(pv2/(p-pv2));//Specific humidity in kg w.v./kg d.a

+v1=Ra*(273+t1)/((p-11.06)*133.5);//volume

+ma=V1/v1;//Amount of air added in kg d.a./min

+mw=ma*(w2-w1);//Amount of water vapour added in kg d.a./min

+nh=((t1-t2)/(t1-tw2))*100;//humidifier efficiency in percentage

+

+//OUTPUT

+printf('(a)From chart Dew point temperature is corresponds to pv2 is 14.5 Degree c \n (b)Amount of water vapour added is %3.3f kg w.v./min \n (c)Humidifier efficiency is %3.1f percentage',mw,nh)

+

diff --git a/1808/CH7/EX7.18/Chapter7_Exampl18.sce b/1808/CH7/EX7.18/Chapter7_Exampl18.sce
new file mode 100644
index 000000000..1f821f3d0
--- /dev/null
+++ b/1808/CH7/EX7.18/Chapter7_Exampl18.sce
@@ -0,0 +1,26 @@
+clc

+clear

+//INPUT DATA

+V1=100;//volue in mm^3/min

+t1=6;//dry bulb temperature in Degree c

+t11=3;//dry bulb temperature in Degree c

+Rc=40;//Capacity of the coil in TR

+mw=40;//Amount of water vapour added in kg d.a./min

+pva=5.68;//saturation pressure

+p=760;//pressure in mm of Hg

+Ra=287.3;//gas constant

+cp=1.005;//specific pressure

+

+

+//CALCULATIONS

+pv1=(pva-((p-pva)*(t1-t11)*1.8)/(2800-(1.3*(1.8*t1+32))));//Saturation pressure in mm Hg

+v1=Ra*(273+t1)/((p-pv1)*133.5);//volume

+ma=V1/v1;//Amount of air added in kg d.a./min

+w1=0.622*(pv1/(p-pv1));//Specific humidity in kg w.v./kg d.a

+w3=w1+(mw/(ma*60));//Specific humidity in kg w.v./kg d.a

+h1=cp*t1+w1*(2500+1.88*t1);//Enthalpy of air per kg of dry air in kJ/kg d.a.

+h3=h1+33.4;//Enthalpy of air per kg of dry air in kJ/kg d.a.

+t3=h3-(w3*2500)/1.02149;//dry bulb temperature in Degree c

+

+//OUTPUT

+printf('(a)Dry bulb temperature is %3.2f Degree C \n (b)From the psychrometric chart wet bulb temperature is 17.8 Degree C ',t3)

diff --git a/1808/CH7/EX7.19/Chapter7_Exampl19.sce b/1808/CH7/EX7.19/Chapter7_Exampl19.sce
new file mode 100644
index 000000000..4e92de16b
--- /dev/null
+++ b/1808/CH7/EX7.19/Chapter7_Exampl19.sce
@@ -0,0 +1,33 @@
+clc

+clear

+//INPUT DATA

+t1=12;//dry bulb temperature in Degree c

+t4=40;//dry bulb temperature in Degree c

+x1=0.9;//realtive humidity in percentage

+t41=25;//wet bulb temperature in Degree c

+x3=0.8;//realtive humidity in percentage

+ps1=10.503;//Saturation temperature in mm Hg

+pv4a=23.74;//Saturation temperature in mm Hg

+t3=22.5;//dry bulb temperature in Degree c

+cp=1.005;//specific pressure

+p=760;//pressure in mm of Hg

+t5=20.8;//dry bulb temperature in Degree c

+

+//CALCULATIONS

+pv1=x1*ps1;//Saturation temperature in mm Hg

+w1=0.622*(pv1/(p-pv1));//Specific humidity in kg w.v./kg d.a

+pv4=(pv4a-((p-pv4a)*(t4-t41)*1.8)/(2800-(1.3*(1.8*t4+32))));//Saturation pressure in mm Hg

+ps3=pv4/x3;//Saturation temperature in mm Hg

+w3=0.622*(pv4/(p-pv4));//Specific humidity in kg w.v./kg d.a

+h3=cp*t3+w3*(2500+1.88*t3);//Enthalpy of air per kg of dry air in kJ/kg d.a.

+t2=(h3-(w1*2500))/1.0191;//dry bulb temperature in Degree c

+h4=cp*t4+w3*(2500+1.88*t4);//Enthalpy of air per kg of dry air in kJ/kg d.a.

+h1=cp*t1+w1*(2500+1.88*t1);//Enthalpy of air per kg of dry air in kJ/kg d.a.

+ht=(h4-h1);//Enthalpy of air per kg of dry air in kJ/kg d.a.

+mw=(w3-w1);//Additional water required in the air washer in kg w.v./kg d.a.

+nh=((t2-t3)/(t2-t5))*100;//humidifier efficiency in percentage

+

+//OUTPUT

+printf('(a)Temperature at the end of the preheating is %3.2f Degree c \n (b)Total heat required is %3.2f kJ/kg d.a.\n (c)Additional heat required in the air washeer is %3.6f kg w.v./kg d.a.\n (d)humidifier efficiency is %3.2f percentage',t2,ht,mw,nh)

+

+

diff --git a/1808/CH7/EX7.2/Chapter7_Exampl2.sce b/1808/CH7/EX7.2/Chapter7_Exampl2.sce
new file mode 100644
index 000000000..55b20da30
--- /dev/null
+++ b/1808/CH7/EX7.2/Chapter7_Exampl2.sce
@@ -0,0 +1,26 @@
+clc

+clear

+//INPUT DATA

+t=20;//Moist temperature in Degree c

+td=15;//Dew point temperature in Degree c

+pv=12.79;//vapour pressure in mm of Hg

+p2=17.52//pressure of water vapour in mm of Hg

+pa=727.21;//pressure of air in mm of Hg

+hfgt=2454.1;//Specific enthalpy in kJ/kgw.v.

+hfgd=2465.9;//Specific enthalpy in kJ/kgw.v.

+cpa=1.005;//specific pressure

+Ra=287.3;//gas constant

+

+//CALCULATIONS

+pv1=12.79*133.5;//prtial pressure in N/m^2

+x=(pv/p2)*100;//realtive humidity in percentage

+w=0.622*(pv/pa);//Specific humidity in kg w.v./kg d.a

+hv=((4.1868*td)+(hfgd)+(1.88*(t-td)));//Specific enthalpy of water vapour in kJ/kg w.v

+hv1=2500+1.8*(t);//Specific enthalpy of water vapour in kJ/kg w.v

+hv2=4.1868*t+2454.1;//Specific enthalpy of water vapour in kJ/kg w.v

+h=cpa*t+w*hv;//Enthalpy of air per kg of dry air in kJ/kg d.a

+va=(Ra*(t+273))/(pa*133.5);//Specific volume of air per kg of dry air in m^3/kg d.a

+

+//OUTPUT

+printf('(a)From steam tables partial pressure of water is %3.1f N/m^2 \n (b)Relative humidity is %3.2f percentage\n (c)Specific humidity %3.5f kg w.v./kg d.a \n(d)Specific enthalpy of water vapour is %3.3f kJ/kg w.v. \n (e)Enthalpy of air per kg of dry air is %3.2f kJ/kg d.a.\n (f)Specific volume of air per kg of dry air is %3.4f m^3/kg d.a.',pv1,x,w,hv,h,va)

+

diff --git a/1808/CH7/EX7.20/Chapter7_Exampl20.sce b/1808/CH7/EX7.20/Chapter7_Exampl20.sce
new file mode 100644
index 000000000..28e5e0b41
--- /dev/null
+++ b/1808/CH7/EX7.20/Chapter7_Exampl20.sce
@@ -0,0 +1,35 @@
+clc

+clear

+//INPUT DATA

+t1=35;//dry bulb temperature in Degree c

+x1=0.8;//realtive humidity in percentage

+t2=15;//Apparatus dew point in Degree c

+t4=25;//dry bulb temperature in Degree c

+V1=200;//Quantity of moist air in m^3/min

+x=0.3;//bypass factor

+ps1=42.16;//Saturation pressure in mm Hg

+p=760;//pressure in mm of Hg

+Ra=287.3;//gas constant

+cp=1.005;//specific pressure

+ps2=12.77;//Saturation pressure in mm Hg

+ps4=23.74;//Saturation pressure in mm Hg

+

+//CALCULATIONS

+pv1=x1*ps1;//Saturation pressure in mm Hg

+w1=0.622*(pv1/(p-pv1));//Specific humidity in kg w.v./kg d.a

+t3=(x*(t1-t2))+t2;//dry bulb temperature in Degree c

+h1=cp*t1+w1*(2500+1.88*t1);//Enthalpy of air per kg of dry air in kJ/kg d.a.

+w2=0.622*(ps2/(p-ps2));//Specific humidity in kg w.v./kg d.a

+w3=x*(w1-w2)+w2;//Specific humidity in kg w.v./kg d.a

+h3=cp*t3+w3*(2500+1.88*t3);//Enthalpy of air per kg of dry air in kJ/kg d.a.

+h4=cp*t4+w3*(2500+1.88*t4);//Enthalpy of air per kg of dry air in kJ/kg d.a.

+v1=Ra*(273+t1)/((p-pv1)*133.5);//volume

+ma=V1/v1;//Amount of air added in kg d.a./min

+Qc=ma*(h1-h3)/210;//Capacity of cooling coil in TR

+Qh=ma*(h4-h3)/60;//Capacity of heating coil in kW

+mw=ma*(w1-w3);//Quantity of water removed in kg w.v./min

+pv4=w3*p/1.01611;//Saturation pressure in mm Hg

+x4=(pv4/ps4)*100;//realtive humidity in percentage

+

+//OUTPUT

+printf('(a)Capacity of cooling coil is %3.2f TR \n (b)Capacity of heating coil is %3.2f kW \n(c)Quantity of water removed is %3.4f kg w.v./min \n (d)realtive humidity is %3.2f percentage',Qc,Qh,mw,x4)

diff --git a/1808/CH7/EX7.21/Chapter7_Exampl21.sce b/1808/CH7/EX7.21/Chapter7_Exampl21.sce
new file mode 100644
index 000000000..1dd98ff61
--- /dev/null
+++ b/1808/CH7/EX7.21/Chapter7_Exampl21.sce
@@ -0,0 +1,34 @@
+clc

+clear

+//INPUT DATA

+t1=35;//dry bulb temperature in Degree c

+t4=25;//dry bulb temperature in Degree c

+V1=40;//Moist air circulation in m^3/min

+x1=0.8;//realtive humidity in percentage

+x4=0.6;//realtive humidity in percentage

+p=760;//pressure in mm of Hg

+Ra=287.3;//gas constant

+cp=1.005;//specific pressure

+ps1=42.157;//Saturation pressure in mm Hg

+ps4=23.74;//Saturation pressure in mm Hg

+t3=16.6;//dry bulb temperature in Degree c

+

+//CALCULATIONS

+pv1=x1*ps1;//Saturation pressure in mm Hg

+v1=Ra*(273+t1)/((p-pv1)*133.5);//volume

+ma=V1/v1;//Amount of air added in kg d.a./min

+w1=0.622*(pv1/(p-pv1));//Specific humidity in kg w.v./kg d.a

+h1=cp*t1+w1*(2500+(1.88*t1));//Enthalpy of air per kg of dry air in kJ/kg d.a.

+pv4=x4*ps4;//Saturation pressure in mm Hg

+x3=(pv4/pv4)*100;//realtive humidity in percentage

+w4=0.622*(pv4/(p-pv4));//Specific humidity in kg w.v./kg d.a

+h4=cp*t4+w4*(2500+1.88*t4);//Enthalpy of air per kg of dry air in kJ/kg d.a.

+h3=cp*t3+w4*(2500+(1.88*t3));//Enthalpy of air per kg of dry air in kJ/kg d.a.

+Qc=ma*(h1-h3)/210;//Capacity of cooling coil in TR

+Qh=ma*(h4-h3)/60;//Capacity of heating coil in kW

+mw=ma*(w1-w4);//Quantity of water removed in kg w.v./min

+

+//OUTPUT

+printf('(a)Capacity of cooling coil is %3.2f kJ/min \n (b)Capacity of heating coil is %3.1f kW \n (c)Quantity of water removed is %3.3f kg w.v./min',Qc,Qh,mw)

+

+

diff --git a/1808/CH7/EX7.3/Chapter7_Exampl3.sce b/1808/CH7/EX7.3/Chapter7_Exampl3.sce
new file mode 100644
index 000000000..1538d6d80
--- /dev/null
+++ b/1808/CH7/EX7.3/Chapter7_Exampl3.sce
@@ -0,0 +1,30 @@
+clc

+clear

+//INPUT DATA

+ta=25;//Dry bulb temperature in Degree c

+tw=15;//Wet bulb temperature in Degree c

+td=7.56;//Dew point temperature in Degree c

+p=760;//Atmospheric air in mm of Hg

+pv1=12.77;//Saturation pressure of water in mm of Hg

+ps=23.74;//Saturation pressure of water in mm of Hg

+Pv=7.788;//Saturation pressure of water in mm of Hg

+Ra=287.3;//gas constant

+Rv=461;//vapour constant

+pa=1015639.698;//air pressure

+cp=1.005;//specific pressure

+

+//CALCULATIONS

+pv=pv1-((p-pv1)*(ta-tw)*1.8/(2800-1.3*(1.8*ta+32)));//Saturation pressure of water in mm of Hg

+x=(pv/ps)*100;//realtive humidity in percentage

+w=0.622*(pv/(p-pv));//Specific humidity in kg w.v./kg d.a

+h=cp*ta+w*(2500+1.88*ta);//Enthalpy of air per kg of dry air in kJ/kg d.a

+Roa=(pa/10)/(Ra*(273+ta));//Density of air in kg/m^3

+Rov=pv*133.5/(Rv*(273+ta));//Density of vapour in kg/m^3

+Ro=Rov+Roa;//Density in kg/m^3

+

+//OUTPUT

+printf('(a)Relative humidity is %3.2f percentage \n  (b)Humidity ratio is %3.4f kg w.v./kg d.a \n (c)Dew point temperature is %3.2f Degree c \n (d)Enthalpy of air per kg of dry air is %3.2f kJ/kg d.a.\n (e)Partial pressure of vapour is %3.3f mm Hg \n (f)density is %3.3f kg/m^3',x,w,td=7.56,h,Pv,Ro)

+

+

+

+

diff --git a/1808/CH7/EX7.4/Chapter7_Exampl4.sce b/1808/CH7/EX7.4/Chapter7_Exampl4.sce
new file mode 100644
index 000000000..1f363a0de
--- /dev/null
+++ b/1808/CH7/EX7.4/Chapter7_Exampl4.sce
@@ -0,0 +1,19 @@
+clc

+clear

+//INPUT DATA

+p=760;//pressure in mm of Hg

+t=30;//dry bulb temperature in Degree c

+p2=0.04246*10^5;//pressure in N/m^2

+cp=1.005;//specific pressure

+hfg=2500;//Specific enthalpy in kJ/kgw.v.

+cpv=1.88;//specific pressure

+

+//CALCULATIONS

+ps=(p2/133.5);//pressure in mm of Hg

+ws=(0.62*(ps/(p-ps)));//Specific humidity in kg w.v./kg d.a

+h=(cp*t)+ws*(hfg+(cpv*t));//Enthalpy of air per kg of dry air in kJ/kg d.a

+

+//OUTPUT

+printf('(a)Accorrding to steam tables The vapour pressure is %3.2f mm Hg \n (b)Specific humidity %3.4f kg w.v./kg d.a \n (c)Enthalpy of air per kg of dry air is %3.2f kJ/kg d.a ',ps,ws,h)

+

+

diff --git a/1808/CH7/EX7.5/Chapter7_Exampl5.sce b/1808/CH7/EX7.5/Chapter7_Exampl5.sce
new file mode 100644
index 000000000..0d8e424d9
--- /dev/null
+++ b/1808/CH7/EX7.5/Chapter7_Exampl5.sce
@@ -0,0 +1,24 @@
+clc

+clear

+//INPUT DATA

+t=30;//dry bulb temperature in Degree c

+x=30;//realtive humidity in percentage

+p=760;//pressure in mm of Hg

+p2=0.04246*10^5;//pressure in N/m^2

+V=100;//volume in m^3

+Rv=0.461;//vapour constant

+Ra=0.2871;//gas constant

+

+//CALCULATIONS

+ps=(p2/133.5);//pressure in mm of Hg

+pv=0.3*ps;//vapour pressure in mm of Hg

+pa=p-pv;//air pressure in mm of Hg

+w=(0.62*(pv/(p-pv)));//Specific humidity in kg w.v./kg d.a

+ws=(0.62*(ps/(p-ps)));//Specific humidity in kg w.v./kg d.a

+m=w/ws;//Degree of saturation

+mv=pv*133.5*V/(Rv*(t+273)*1000);//Mass of vapour in kg.w.v.

+ma=pa*133.5*V/(Ra*1000*(t+273));//Mass of dry air in kg.d.a.

+

+//OUTPUT

+printf('(a)Partial pressure of dry air vapour is %3.3f mm Hg \n (b)Dew point temperature is 10.62 Degree c \n (c)Specific humidity %3.4f kg w.v./kg d.a \n (d)Degree of saturation is %3.3f \n (e)mass of vapour is %3.4f kg.w.v.\n (f)mass of dry air is %3.4f kg.d.a',pa,w,m,mv,ma)

+ 

diff --git a/1808/CH7/EX7.6/Chapter7_Exampl6.sce b/1808/CH7/EX7.6/Chapter7_Exampl6.sce
new file mode 100644
index 000000000..029754fbf
--- /dev/null
+++ b/1808/CH7/EX7.6/Chapter7_Exampl6.sce
@@ -0,0 +1,23 @@
+clc

+clear

+//INPUT DATA

+t=35;//dry bulb temperature in Degree c

+td=15;//dew point temperature in Degree c

+p=760;//pressure in mm of Hg

+pv1=0.017051*10^5;//saturation pressure

+ps1=0.05628 *10^5;//saturation pressure

+cp=1.005;//specific pressure

+cpv=1.88;//specific volume

+hfg=2500;//Specific enthalpy in kJ/kgw.v.

+

+//CALCULATIONS

+pv=pv1*133.5;//vapour pressure in mm of Hg

+ps=ps1*133.5;//pressure in mm of Hg

+x=(pv/ps)*100;//realtive humidity in percentage

+ws=(0.622*(12.77/(760-12.77)));//Specific humidity in kg w.v./kg d.a

+h=(cp*t)+ws*(hfg+(cpv*t));//Enthalpy of air per kg of dry air in kJ/kg d.a

+

+//OUTPUT

+printf('(a)Relative humidity is %3.2f percentage \n (b)Specific humidity %3.4f kg w.v./kg d.a \n (c)Enthalpy of air per kg of dry air is %3.2f kJ/kg d.a ',x,ws,h)

+

+

diff --git a/1808/CH7/EX7.7/Chapter7_Exampl7.sce b/1808/CH7/EX7.7/Chapter7_Exampl7.sce
new file mode 100644
index 000000000..1547af956
--- /dev/null
+++ b/1808/CH7/EX7.7/Chapter7_Exampl7.sce
@@ -0,0 +1,14 @@
+clc

+clear

+//INPUT DATA

+t=25;//dry bulb temperature in Degree c

+ws=8.6/100;//Specific humidity in kg w.v./kg d.a

+p=760;//pressure in mm of Hg

+ps=23.74;//Saturation pressure in mm of Hg

+

+//CALCULATIONS

+pv=10.508/1.01383;//Partial pressure of water vapour in mm Hg

+x=(pv/ps)*100;//realtive humidity in percentage

+

+//OUTPUT

+printf('(a)Partial pressure of dry air vapour is %3.3f mm Hg \n (b)Relative humidity is %3.2f percentage ',pv,x)

diff --git a/1808/CH7/EX7.8/Chapter7_Exampl8.sce b/1808/CH7/EX7.8/Chapter7_Exampl8.sce
new file mode 100644
index 000000000..d075d4fa7
--- /dev/null
+++ b/1808/CH7/EX7.8/Chapter7_Exampl8.sce
@@ -0,0 +1,32 @@
+clc

+clear

+//INPUT DATA

+p=0.95*10^5;//Atmospheric air 

+tw1=20//Wet bulb temperature in Degree c

+t1=31;//Dry bulb temperature in Degree c

+pv2=0.02339*10^5;//vapour pressure in mm of Hg

+hv1=2556.3;//Enthalpy corresponds tovapour inlet in kJ/kg w.v

+hv2=2538.1;//Enthalpy corresponds tovapour outlet in kJ/kg w.v

+h6=83.96;//sensible heat of water in kJ/kg w.v

+m=1;//mass flow rate in kg.d.a.

+cp=1.005;//specific pressure

+t1=30;//temperature in K

+t2=20;//temperature in K

+ps1=0.0425;//Saturation pressure in bar

+

+//CALCULATIONS

+ha1=m*cp*t1;//Enthalpy of air per kg of dry air in kJ/kg d.a

+ha2=m*cp*t2;//Enthalpy of air per kg of dry air in kJ/kg d.a

+w2=0.622*(pv2/(p-pv2));//Specific humidity in kg w.v./kg d.a

+w1=(w2*(hv2-h6)+(ha2-ha1))/(hv1-h6);//Specific humidity in kg w.v./kg d.a

+pv1=0.01759485/1.01759485;//vapour pressure in bar

+x=(pv1/ps1)*100;//realtive humidity in percentage

+

+//OUTPUT

+printf('(a)Humidity ratio is %3.4f kg w.v./kg d.a \n (b)Vapour pressure is %3.5f bar \n relative humidity is %3.2f percentage \n (c) According to steam tables Dew point temperature is 14.5 Degree c ',w1,pv1,x)

+

+

+

+

+

+

diff --git a/1808/CH7/EX7.9/Chapter7_Exampl9.sce b/1808/CH7/EX7.9/Chapter7_Exampl9.sce
new file mode 100644
index 000000000..fca84be2e
--- /dev/null
+++ b/1808/CH7/EX7.9/Chapter7_Exampl9.sce
@@ -0,0 +1,28 @@
+clc

+clear

+//INPUT DATA

+m1=1;//mass flow rate in kg

+m2=2;//mass flow rate in kg

+t1=50;//temperature in Degree C

+t2=20;//temperature in Degree C

+x1=0.5;//temperature in Degree C

+td2=20;//Dew point temperature in Degree C

+ps1=0.12354*10^5;//Saturation pressure in N/m^2

+ps2=17.52;//Saturation pressure in mm Hg

+p=760;//pressure in mm of Hg

+m12=0.5;//Ratio of masses

+

+//CALCULATIONS

+pv1=x1*ps1;//vapour pressure in mm Hg

+pv11=pv1/133.5;//vapour pressure in mm Hg

+w1=0.622*(pv11/(p-pv11));//Specific humidity in kg w.v./kg d.a

+w2=0.622*(ps2/(p-ps2));//Specific humidity in kg w.v./kg d.a

+w3=(w1+2*w2)/3;//Specific humidity in kg w.v./kg d.a

+t3=(t1+2*t2)/3;//temperature in Degree C

+

+//OUTPUT

+printf('(i)Temperature of the mixture is %3.1f Degree C \n (ii)Specific humidity of the mixture is %3.5f kg/kg d.a.',t3,w3)

+

+

+

+