From 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 Mon Sep 17 00:00:00 2001
From: prashantsinalkar
Date: Tue, 10 Oct 2017 12:27:19 +0530
Subject: initial commit / add all books

---
 965/CH2/EX2.72/72.sci | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 965/CH2/EX2.72/72.sci

(limited to '965/CH2/EX2.72/72.sci')

diff --git a/965/CH2/EX2.72/72.sci b/965/CH2/EX2.72/72.sci
new file mode 100644
index 000000000..07e63fedb
--- /dev/null
+++ b/965/CH2/EX2.72/72.sci
@@ -0,0 +1,23 @@
+clc;
+clear all;
+disp("heat flow through wire")
+k=0.12;// W/(m*C)
+r1=2/2;//mm
+r2=r1+0.8;//mm
+ho=35;// W/(m^2*K)
+rc=1000*k/ho;//mm
+disp("mm",rc,"critical radius of insulation =") 
+
+disp("i) heat flow through an insulated wire") 
+Rthcd=(log(r2/r1))/k;
+Rthcv=1000/(ho*r2);
+Rth12=Rthcd+Rthcv;
+//Q12=2*pi*L*(t1-tair)/Rth12;
+
+Rthcd=(log(rc/r1))/k;
+Rthcv=1000/(ho*rc);
+Rth1c=Rthcd+Rthcv;
+//Q1c=2*pi*L*(t1-tair)/Rth1c;
+//(Q1c-Q12)/Q12*100
+change=(1/Rth1c-1/Rth12)*100/(1/Rth12)
+disp("%")
-- 
cgit