1 files changed, 28 insertions, 0 deletions
diff --git a/914/CH11/EX11.7/ex11_7.sce b/914/CH11/EX11.7/ex11_7.sce
new file mode 100755
index 000000000..bda1cbc8e
--- /dev/null
+++ b/914/CH11/EX11.7/ex11_7.sce
@@ -0,0 +1,28 @@
+clc;
+warning("off");
+printf("\n\n example11.7 - pg536");
+// given
+di=0.620;  //[inch] - internal diameter
+d0=0.750;  //[inch] - outer diameter
+Ai=0.1623;  //[ft^2/ft]
+Ao=0.1963;  //[ft^2/ft]
+wc=12*(471.3/0.9425);
+cp=1;  //[Btu/lbm*degF] - heat capacity of water
+Tco=110;
+Tci=50;
+qtotal=wc*cp*(Tco-Tci);
+deltaH_coldwater=3.6*10^5;
+deltaH_vapourization=1179.7-269.59;
+wh=deltaH_coldwater/deltaH_vapourization;
+hi=80;  //[Btu/h*ft^2*degF]
+ho=500;  //[Btu/h*ft^2*degF]
+km=26;  //[Btu/h*ft*degF]
+Ui=1/((1/hi)+((Ai*log(d0/di))/(2*%pi*km))+(Ai/(Ao*ho)));
+disp(Ui)
+deltaT1=300-50;
+deltaT2=300-110;
+LMTD=(deltaT1-deltaT2)/(log(deltaT1/deltaT2));
+A=qtotal/(Ui*LMTD);
+L=A/Ai;
+printf("\n\n the length of the heat exchanger is \n L = %f ft",L);
+