initial commit / add all books

1 files changed, 24 insertions, 0 deletions

diff --git a/1752/CH8/EX8.3/exa_8_3.sce b/1752/CH8/EX8.3/exa_8_3.sce
new file mode 100755
index 000000000..8c4b5b157
--- /dev/null
+++ b/1752/CH8/EX8.3/exa_8_3.sce
@@ -0,0 +1,24 @@
+//Exa 8.3

+clc;

+clear;

+close;

+//given data

+t_hi=110;// in degree C

+t_ci=35;// in degree C

+t_co=75;// in degree C

+Mh=2.5;// in kg/s

+Mc=1;// in kg/s

+Cph=1.9; // in kJ/kg K

+Cpc=4.18;//  in kJ/kg K

+U=300;// in W/m^2 K

+

+// Energy balance Mc*Cpc*(t_co-t_ci) = Mh*Cph*(t_hi-t_ho)

+t_ho=t_hi- Mc*Cpc*(t_co-t_ci)/(Mh*Cph);// in degree C

+del_t1=t_hi-t_co;//in degree C

+del_t2=t_ho-t_ci;//in degree C

+del_tm= (del_t1-del_t2)/log(del_t1/del_t2);

+Cph=Cph*10^3;// in J/kg degree C

+q=Mh*Cph*(t_hi-t_ho);

+//Formula q=U*A*del_tm

+A=q/(U*del_tm);

+disp(A,"Area of the heat exchanger in square meter")