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| author | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
|---|---|---|
| committer | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
| commit | 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 (patch) | |
| tree | dbb9e3ddb5fc829e7c5c7e6be99b2c4ba356132c /965/CH2/EX2.73/73.sci | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
| download | Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.gz Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.bz2 Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.zip | |
initial commit / add all books
Diffstat (limited to '965/CH2/EX2.73/73.sci')
| -rw-r--r-- | 965/CH2/EX2.73/73.sci | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/965/CH2/EX2.73/73.sci b/965/CH2/EX2.73/73.sci new file mode 100644 index 000000000..38f1d621d --- /dev/null +++ b/965/CH2/EX2.73/73.sci @@ -0,0 +1,25 @@ +clc;
+clear all;
+disp("increase in heat dissipation")
+k=0.174;// W/(m*C)
+r1=6.5/2;//mm
+ho=8.722;// W/(m^2*K)
+rc=1000*k/ho;//mm
+L=1;//m
+t1=60;// degree C
+tair=20;// degree C
+disp("mm",rc,"critical radius of insulation =")
+t=rc-r1;
+disp("mm",t,"minimum insulation of thickness t = ")
+
+disp("i) without insulation ")
+Rthcv=1000/(ho*r1);
+Q1=2*3.1416*L*(t1-tair)/Rthcv;
+disp("W/m",Q1," heat flow without insulation Q1 =")
+Rthcd=(log(rc/r1))/k;
+Rthcv=1000/(ho*rc);
+Rth2=Rthcd+Rthcv;
+Q2=2*3.1416*L*(t1-tair)/Rth2;
+disp("W/m",Q2," heat flow with insulation Q2 =")
+change=(Q2-Q1)*100/Q1;
+disp("%",change,"Percent increase in heat dissipation =")
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