initial commit / add all books

1 files changed, 36 insertions, 0 deletions

diff --git a/2969/CH4/EX4.9/Ex4_9.sce b/2969/CH4/EX4.9/Ex4_9.sce
new file mode 100755
index 000000000..71369a81c
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+clc

+clear

+//DATA GIVEN

+m=1.5;                         //mass of steam in cooker in kg

+p1=5;                          //pressure of steam in bar

+x1=1;                          //initial dryness fraction of steam

+x2=0.6;                        //final dryness fraction of steam

+

+//At 5 bar, from steam tables

+Ts1=151.8+273;                  //in K

+hf1=640.1;                      //kJ/kg

+hfg1=2107.4;                    //kJ/kg

+vg1=0.375;                      //m^3/kg

+

+V1=m*vg1;                                     //volume of pressure cooker in m^3

+u1=(hf1+hfg1)-(p1*10^5)*(vg1*10^-3);          //internal energy of steam per kg at initial point 1

+//V1=V2

+//V1=m*[(1-x2)*vf2+x2*vg2]                    //vf2 is negligible

+vg2=V1/x2/1.5;

+

+//from steam tables coreesponding to vg2=0.625 m^3/kg

+p2=2.9;

+Ts2=132.4+273;                  //in K

+hf2=556.5;                      //kJ/kg

+hfg2=2166.6;                    //kJ/kg

+

+u2=(hf2+x2*hfg2)-(p2*10^5)*x2*(vg2*10^-3);    //internal energy of steam per kg at final point 2

+

+hnet=u2-u1;                                   //heat transferred at constant volume per kg

+Htotal=m*hnet;                                //total heat transferred

+//-ve sign indicates that heat has been rejected

+Hrej=-1*Htotal;

+

+printf(' (i) The Pressure at new state is: %1.1f bar. \n',p2);

+printf('      The Temperature at new state is: %3.1f deg. celsius or %3.1f K. \n',(Ts2-273),Ts2);

+printf(' (ii) The Total heat to be REJECTED is: %4.2f kJ.',Hrej);