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/EX15.19/19.sce | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100755 551/CH15/EX15.19/19.sce

(limited to '551/CH15/EX15.19/19.sce')

diff --git a/551/CH15/EX15.19/19.sce b/551/CH15/EX15.19/19.sce
new file mode 100755
index 000000000..4f63b58fe
--- /dev/null
+++ b/551/CH15/EX15.19/19.sce
@@ -0,0 +1,28 @@
+clc
+t_c1=25; //0C
+t_c2=65; //0C
+cph=1.45; //kJ/kg K
+m_h=0.9; //kg/s
+t_h1=230; //0C
+t_h2=160; //0C
+U=420; //W/m^2 0C
+cpc=4.187; //kJ/kg K
+
+disp("(i) The rate of heat transfer =")
+Q=m_h*cph*(t_h1-t_h2);
+disp(Q)
+disp("kJ/s")
+
+
+disp("(ii) The mass flow rate of water =")
+m_c=Q/cpc/(t_c2-t_c1);
+disp(m_c)
+disp("kg/s")
+
+
+disp("(iii) The surface area of heat exchanger =")
+LMTD=((t_h1-t_c2)- (t_h2-t_c1))/log((t_h1-t_c2)/(t_h2-t_c1)); //logarithmic mean temperature difference
+A=Q*10^3/U/LMTD;
+disp("A=")
+disp(A)
+disp("m^2")
\ No newline at end of file
-- 
cgit