From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001
From: priyanka
Date: Wed, 24 Jun 2015 15:03:17 +0530
Subject: initial commit / add all books

---
 551/CH15/EX15.21/21.sce | 43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100755 551/CH15/EX15.21/21.sce

(limited to '551/CH15/EX15.21')

diff --git a/551/CH15/EX15.21/21.sce b/551/CH15/EX15.21/21.sce
new file mode 100755
index 000000000..4522b7b3d
--- /dev/null
+++ b/551/CH15/EX15.21/21.sce
@@ -0,0 +1,43 @@
+clc
+di=0.0296; //m
+d0=0.0384; //m
+U=4000; //W/m^2 0C
+V=3; //m/s
+t_c1=24; //0C
+x=0.9;
+ps=(760-660)/760*1.0133; //bar
+t_h1=51; //0C
+t_h2=51; //0C
+h_fg=2592; //kJ/kg
+t_c2=47; //0C
+P=15; //MW
+ssc=5; //specific steam consumption in kg/kWh
+cpc=4.187; //kJ?kg K
+rho=1000;
+
+m_s=P*10^3*ssc/60; //kg/min
+
+disp("(i) Mass of cooling water circulated per minute =")
+m_w=m_s*x*h_fg/cpc/(t_c2-t_c1);
+disp(m_w)
+disp("kg/min")
+
+
+disp("(ii) Condenser surface area")
+Q=m_s*x*h_fg*10^3/60;
+
+theta=((t_h1-t_c1)- (t_h2-t_c2))/log((t_h1-t_c1)/(t_h2-t_c2)); //Logarithmic mean temperature difference
+A=Q/U/theta;
+disp(A)
+disp("m^2")
+
+
+disp("(iii) Number of tubes required per pass =")
+Np=m_w/60*4/%pi/di^2/V/rho;
+disp(Np)
+
+
+disp("(iv) Tube length =")
+L=A/%pi/d0/(2*Np);
+disp(L)
+disp("m")
\ No newline at end of file
-- 
cgit