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

---
 1529/CH21/EX21.19/21_19.sce | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100755 1529/CH21/EX21.19/21_19.sce

(limited to '1529/CH21/EX21.19')

diff --git a/1529/CH21/EX21.19/21_19.sce b/1529/CH21/EX21.19/21_19.sce
new file mode 100755
index 000000000..9fdf0a437
--- /dev/null
+++ b/1529/CH21/EX21.19/21_19.sce
@@ -0,0 +1,23 @@
+//Chapter 21, Problem 19
+clc
+k=400000                                //transformer rating
+v1=5000                                 //primary current
+v2=320                                  //secondary current
+r1=0.5                                  //resistance in ohm
+r2=0.001                                //resistance in ohm
+lfe=2500                                //iron loss
+pf=0.85                                 //power factor
+i1=k/v1                                 //primary current
+i2=k/v2                                 //secondary current
+lcu=(i1^2*r1)+(i2^2*r2)                 //total copper loss
+lt=lcu+lfe                              //total loss
+pt=k*pf                                 //total output power
+pi=pt+lt                                //input power
+n=(1-(lt/pi))*100                       //efficiency
+lc=lcu*(1/2)^2                          //total copper loss at half load
+lh=lc+lfe                               //total loss at half loss
+ph0=(1/2)*pt                            //output power at half load
+phi=(ph0+lh)                            //input power at half load
+n1=(1-(lh/phi))*100                     //efficiency
+printf("(a) Efficiency on full load = %.3f percent\n\n",n)
+printf("(b) Efficiency at half load = %.3f percent\n\n",n1)
-- 
cgit