initial commit / add all books

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+// Display mode

+mode(0);

+// Display warning for floating point exception

+ieee(1);

+clear;

+clc;

+disp("Engineering Thermodynamics by Onkar Singh Chapter 12 Example 3")

+k_insulation=0.3;//thermal conductivity of insulation in KJ/m hr oc

+k_pipe=209;//thermal conductivity of pipe in KJ/m hr oc

+T1=300;//temperature of inner surface of steam pipe in degree celcius

+T3=50;//temperature of outer surface of insulation layer in degree celcius

+r1=15*10^-2/2;//steam pipe inner radius without insulation in m

+r2=16*10^-2/2;//steam pipe outer radius without insulation in m

+r3=22*10^-2/2;//radius with insulation in m

+m=0.5;//steam entering rate in kg/min

+disp("here,heat conduction is considered in pipe wall from 1 to 2 and conduction through insulation between 2 and 3 of one dimentional steady state type.")

+disp("Q=(T1-T3)*2*%pi*L/((1/k_pipe)*log(r2/r1)+(1/k_insulation*log(r3/r2)))in KJ/hr")

+L=1;

+Q=(T1-T3)*2*%pi*L/((1/k_pipe)*log(r2/r1)+(1/k_insulation*log(r3/r2)))

+disp("so heat loss per meter from pipe =1479.34 KJ/hr")

+disp("heat loss from  5 m length(Q) in KJ/hr")

+Q=5*Q

+disp("enthalpy of saturated steam at 300 oc,h_sat=2749 KJ/kg=hg from steam table")

+hg=2749;

+disp("mass flow of steam(m)in kg/hr")

+m=m*60

+disp("final enthalpy of steam per kg at exit of 5 m pipe(h)in KJ/kg")

+h=hg-(Q/m)

+disp("let quality of steam at exit be x,")

+disp("also at 300oc,hf=1344 KJ/kg,hfg=1404.9 KJ/kg from steam table")

+hf=1344;

+hfg=1404.9;

+disp("h=hf+x*hfg")

+disp("so x=(h-hf)/hfg")

+x=(h-hf)/hfg

+disp("so quality of steam at exit=0.8245")

diff --git a/2873/CH12/EX12.3/Ex12_3_1.jpg b/2873/CH12/EX12.3/Ex12_3_1.jpg
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diff --git a/2873/CH12/EX12.3/Ex12_3_2.jpg b/2873/CH12/EX12.3/Ex12_3_2.jpg
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