12 files changed, 110 insertions, 0 deletions

diff --git a/3685/CH3/EX3.1/Ex3_1.sce b/3685/CH3/EX3.1/Ex3_1.sce
new file mode 100644
index 000000000..461af516d
--- /dev/null
+++ b/3685/CH3/EX3.1/Ex3_1.sce
@@ -0,0 +1,8 @@
+clc

+dV = 0.5 // Change in volume in m^3

+P = 101.325e03 // Atmospheric pressure in N/m^2

+Wd = P*dV // Work done in J

+printf("\n Example 3.1")

+printf("\n The amount of work done upon the atmosphere by the balloon is %f kJ",Wd/1e3)

+//The answers vary due to round off error

+

diff --git a/3685/CH3/EX3.1/Ex3_1.txt b/3685/CH3/EX3.1/Ex3_1.txt
new file mode 100644
index 000000000..0f527e33e
--- /dev/null
+++ b/3685/CH3/EX3.1/Ex3_1.txt
@@ -0,0 +1,2 @@
+  Example 3.1

+ The amount of work done upon the atmosphere by the balloon is 50.662500 kJ 
\ No newline at end of file
diff --git a/3685/CH3/EX3.2/Ex3_2.sce b/3685/CH3/EX3.2/Ex3_2.sce
new file mode 100644
index 000000000..0be14e053
--- /dev/null
+++ b/3685/CH3/EX3.2/Ex3_2.sce
@@ -0,0 +1,7 @@
+clc

+dV = 0.6 // Volumetric change in m^3

+P = 101.325e03 // Atmospheric pressure in N/m^2

+Wd = P*dV // Work done in J

+printf("\n Example 3.2")

+printf("\n The displacement work done by the air is %f kJ",Wd/1e3)

+//The answers vary due to round off error

diff --git a/3685/CH3/EX3.2/Ex3_2.txt b/3685/CH3/EX3.2/Ex3_2.txt
new file mode 100644
index 000000000..33855a9a9
--- /dev/null
+++ b/3685/CH3/EX3.2/Ex3_2.txt
@@ -0,0 +1,2 @@
+  Example 3.2

+ The displacement work done by the air is 60.795000 kJ 
\ No newline at end of file
diff --git a/3685/CH3/EX3.3/Ex3_3.sce b/3685/CH3/EX3.3/Ex3_3.sce
new file mode 100644
index 000000000..689a33c77
--- /dev/null
+++ b/3685/CH3/EX3.3/Ex3_3.sce
@@ -0,0 +1,16 @@
+clc

+// Given that

+T = 1.275 // Torque acting against the fluid in mN

+N = 10000 // Number of revolutions

+W1 = 2*%pi*T*1e-3*N // Work done by stirring device upon the system

+P = 101.325e03 // Atmospheric pressure in kN/m^2

+d = 0.6 // Piston diameter in m

+A = (%pi/4)*(d)^2 // Piston area in m

+L = 0.80 // Displacement of diameter in m

+W2 = (P*A*L)/1000 // Work done by the system on the surroundings i KJ

+W = -W1+W2 // net work transfer for the system

+

+printf("\n Example 3.3")

+printf("\n The net work transfer for the system is %f kJ",W)

+//The answers vary due to round off error

+

diff --git a/3685/CH3/EX3.3/Ex3_3.txt b/3685/CH3/EX3.3/Ex3_3.txt
new file mode 100644
index 000000000..ddad22396
--- /dev/null
+++ b/3685/CH3/EX3.3/Ex3_3.txt
@@ -0,0 +1,2 @@
+ Example 3.3

+ The net work transfer for the system is -57.191438 kJ
\ No newline at end of file
diff --git a/3685/CH3/EX3.4/Ex3_4.sce b/3685/CH3/EX3.4/Ex3_4.sce
new file mode 100644
index 000000000..65418dd90
--- /dev/null
+++ b/3685/CH3/EX3.4/Ex3_4.sce
@@ -0,0 +1,17 @@
+clc

+// Given that

+ad = 5.5e-04 // Area of indicator diagram in m^2

+ld = 0.06 // Length of diagram in m

+k = 147 // Spring value in MPa/m

+w = 150 // Speed of engine in revolution per minute

+L = 1.2 // Stroke of piston in m

+d = 0.8 // Diameter of the cylinder in m

+A = (%pi/4)*(0.8^2) // Area of cylinder

+Pm = (ad/ld)*k // Effective pressure in MPa

+W1 = Pm*L*A*w // Work done in 1 minute MJ

+W = (12*W1)/60 // The rate of work transfer gas to the piston in MJ/s

+

+printf("\n Example 3.4")

+printf("\n The rate of work transfer from gas to the piston is %d kW",W*1e3)

+//The answers vary due to round off error

+

diff --git a/3685/CH3/EX3.4/Ex3_4.txt b/3685/CH3/EX3.4/Ex3_4.txt
new file mode 100644
index 000000000..79db85860
--- /dev/null
+++ b/3685/CH3/EX3.4/Ex3_4.txt
@@ -0,0 +1,2 @@
+ Example 3.4

+ The rate of work transfer from gas to the piston is 24383 kW 
\ No newline at end of file
diff --git a/3685/CH3/EX3.5/Ex3_5.sce b/3685/CH3/EX3.5/Ex3_5.sce
new file mode 100644
index 000000000..d02dd3a3e
--- /dev/null
+++ b/3685/CH3/EX3.5/Ex3_5.sce
@@ -0,0 +1,28 @@
+clc

+//Given that

+m = 5 // mass flow rate in tones/h

+Ti = 15 // Initial temperature in degree Celsius

+tp = 1535 // Phase change temperature in degree Celsius

+Tf = 1650 // Final temperature in degree Celsius

+Lh = 270 // Latent heat of iron in kJ/Kg

+ml = 29.93 // Specific heat of iron in liquid phase in kJ/Kg

+ma = 56 // Atomic weight of iron

+sh = 0.502 // Specific heat of iron in solid phase in kJ/Kg

+d = 6900 // Density of molten metal in kg/m^3

+n=0.7 // furnace efficiency

+l_d_ratio = 2 // length to diameter ratio

+printf("\n Example 3.5")

+h1 = sh*(tp-Ti) // Heat required to raise temperature

+h2 = Lh // Heat consumed in phase change

+h3 = ml*(Tf-tp)/ma // Heat consumed in raising temperature of molten mass

+h = h1+h2+h3 // Heat required per unit mass

+Hi = h*m*1e3 // Ideal heat requirement

+H = Hi/(n*3600) // Actual heat requirement

+V = (3*m)/d // Volume required in m^3

+d = (4*V/(%pi*l_d_ratio))^(1/3) // Diameter of furnace 

+l = d*l_d_ratio // Length of furnace

+printf("\n Rating of furnace would be %f *1e3 kW",H/1e3)

+printf("\n Diameter of furnace is %f m",d)

+printf("\n Length of furnace is %f m",l)

+//The answer provided in the textbook is wrong

+

diff --git a/3685/CH3/EX3.5/Ex3_5.txt b/3685/CH3/EX3.5/Ex3_5.txt
new file mode 100644
index 000000000..c58a0b917
--- /dev/null
+++ b/3685/CH3/EX3.5/Ex3_5.txt
@@ -0,0 +1,4 @@
+ Example 3.5

+ Rating of furnace would be 2.171634 *1e3 kW

+ Diameter of furnace is 0.111440 m

+ Length of furnace is 0.222880 m 
\ No newline at end of file
diff --git a/3685/CH3/EX3.6/Ex3_6.sce b/3685/CH3/EX3.6/Ex3_6.sce
new file mode 100644
index 000000000..4ee00217f
--- /dev/null
+++ b/3685/CH3/EX3.6/Ex3_6.sce
@@ -0,0 +1,19 @@
+clc

+// Given that

+SH = 0.9 // Specific heat of aluminium in solid state in kJ/kgK 

+L = 390 // Latent heat in kJ/kg

+aw = 27 // Atomic weight

+D = 2400 // Density in molten state in kg/m^3

+Tf = 700 // Final temperature in degree Celsius

+Tm = 660 // Melting point of aluminium in degree Celsius

+Ti = 15 // Initial temperature in degree Celsius

+HR = SH*(Tm-Ti)+L+(29.93/27)*(Tf-Tm) // Heat requirement

+HS = HR/0.7  // Heat supplied

+RM = 2.17e3*3600/HS  // From the data of problem 3.7

+V = 2.18 // Volume in m^3

+M = V*D

+printf("\n Example 3.6")

+printf("\n Rate at which aluminium can be melted is %f tonnes/h",RM/1e3)

+printf("\n Mass of aluminium that can be held in furnace is %f tonnes",M/1e3)

+

+

diff --git a/3685/CH3/EX3.6/Ex3_6.txt b/3685/CH3/EX3.6/Ex3_6.txt
new file mode 100644
index 000000000..ad5afc901
--- /dev/null
+++ b/3685/CH3/EX3.6/Ex3_6.txt
@@ -0,0 +1,3 @@
+ Example 3.6

+ Rate at which aluminium can be melted is 5.388432 tonnes/h

+ Mass of aluminium that can be held in furnace is 5.232000 tonnes 
\ No newline at end of file